diff --git a/crates/ruff/src/autofix/edits.rs b/crates/ruff/src/autofix/edits.rs
index 17736349a5..6bdc112ffb 100644
--- a/crates/ruff/src/autofix/edits.rs
+++ b/crates/ruff/src/autofix/edits.rs
@@ -179,16 +179,13 @@ fn is_only<T: PartialEq>(vec: &[T], value: &T) -> bool {
 fn is_lone_child(child: &Stmt, parent: &Stmt) -> bool {
     match parent {
         Stmt::FunctionDef(ast::StmtFunctionDef { body, .. })
-        | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef { body, .. })
         | Stmt::ClassDef(ast::StmtClassDef { body, .. })
-        | Stmt::With(ast::StmtWith { body, .. })
-        | Stmt::AsyncWith(ast::StmtAsyncWith { body, .. }) => {
+        | Stmt::With(ast::StmtWith { body, .. }) => {
             if is_only(body, child) {
                 return true;
             }
         }
         Stmt::For(ast::StmtFor { body, orelse, .. })
-        | Stmt::AsyncFor(ast::StmtAsyncFor { body, orelse, .. })
         | Stmt::While(ast::StmtWhile { body, orelse, .. }) => {
             if is_only(body, child) || is_only(orelse, child) {
                 return true;
diff --git a/crates/ruff/src/checkers/ast/analyze/deferred_for_loops.rs b/crates/ruff/src/checkers/ast/analyze/deferred_for_loops.rs
index c9ed5be35d..8898e1df69 100644
--- a/crates/ruff/src/checkers/ast/analyze/deferred_for_loops.rs
+++ b/crates/ruff/src/checkers/ast/analyze/deferred_for_loops.rs
@@ -11,21 +11,18 @@ pub(crate) fn deferred_for_loops(checker: &mut Checker) {
         for snapshot in for_loops {
             checker.semantic.restore(snapshot);
 
-            if let Stmt::For(ast::StmtFor {
+            let Stmt::For(ast::StmtFor {
                 target, iter, body, ..
-            })
-            | Stmt::AsyncFor(ast::StmtAsyncFor {
-                target, iter, body, ..
-            }) = &checker.semantic.current_statement()
-            {
-                if checker.enabled(Rule::UnusedLoopControlVariable) {
-                    flake8_bugbear::rules::unused_loop_control_variable(checker, target, body);
-                }
-                if checker.enabled(Rule::IncorrectDictIterator) {
-                    perflint::rules::incorrect_dict_iterator(checker, target, iter);
-                }
-            } else {
-                unreachable!("Expected Expr::For | Expr::AsyncFor");
+            }) = checker.semantic.current_statement()
+            else {
+                unreachable!("Expected Stmt::For");
+            };
+
+            if checker.enabled(Rule::UnusedLoopControlVariable) {
+                flake8_bugbear::rules::unused_loop_control_variable(checker, target, body);
+            }
+            if checker.enabled(Rule::IncorrectDictIterator) {
+                perflint::rules::incorrect_dict_iterator(checker, target, iter);
             }
         }
     }
diff --git a/crates/ruff/src/checkers/ast/analyze/deferred_scopes.rs b/crates/ruff/src/checkers/ast/analyze/deferred_scopes.rs
index bcb655a16b..6ab4f74d30 100644
--- a/crates/ruff/src/checkers/ast/analyze/deferred_scopes.rs
+++ b/crates/ruff/src/checkers/ast/analyze/deferred_scopes.rs
@@ -241,10 +241,7 @@ pub(crate) fn deferred_scopes(checker: &mut Checker) {
             flake8_pyi::rules::unused_private_typed_dict(checker, scope, &mut diagnostics);
         }
 
-        if matches!(
-            scope.kind,
-            ScopeKind::Function(_) | ScopeKind::AsyncFunction(_) | ScopeKind::Lambda(_)
-        ) {
+        if matches!(scope.kind, ScopeKind::Function(_) | ScopeKind::Lambda(_)) {
             if checker.enabled(Rule::UnusedVariable) {
                 pyflakes::rules::unused_variable(checker, scope, &mut diagnostics);
             }
@@ -270,10 +267,7 @@ pub(crate) fn deferred_scopes(checker: &mut Checker) {
             }
         }
 
-        if matches!(
-            scope.kind,
-            ScopeKind::Function(_) | ScopeKind::AsyncFunction(_) | ScopeKind::Module
-        ) {
+        if matches!(scope.kind, ScopeKind::Function(_) | ScopeKind::Module) {
             if enforce_typing_imports {
                 let runtime_imports: Vec<&Binding> = checker
                     .semantic
diff --git a/crates/ruff/src/checkers/ast/analyze/expression.rs b/crates/ruff/src/checkers/ast/analyze/expression.rs
index 6398e14e87..038ded69c7 100644
--- a/crates/ruff/src/checkers/ast/analyze/expression.rs
+++ b/crates/ruff/src/checkers/ast/analyze/expression.rs
@@ -206,7 +206,7 @@ pub(crate) fn expression(expr: &Expr, checker: &mut Checker) {
                 }
                 ExprContext::Store => {
                     if checker.enabled(Rule::NonLowercaseVariableInFunction) {
-                        if checker.semantic.current_scope().kind.is_any_function() {
+                        if checker.semantic.current_scope().kind.is_function() {
                             // Ignore globals.
                             if !checker
                                 .semantic
diff --git a/crates/ruff/src/checkers/ast/analyze/statement.rs b/crates/ruff/src/checkers/ast/analyze/statement.rs
index eee23db997..db0fa91f56 100644
--- a/crates/ruff/src/checkers/ast/analyze/statement.rs
+++ b/crates/ruff/src/checkers/ast/analyze/statement.rs
@@ -70,22 +70,14 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
             }
         }
         Stmt::FunctionDef(ast::StmtFunctionDef {
+            is_async,
             name,
             decorator_list,
             returns,
             parameters,
             body,
             type_params,
-            ..
-        })
-        | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef {
-            name,
-            decorator_list,
-            returns,
-            parameters,
-            body,
-            type_params,
-            ..
+            range: _,
         }) => {
             if checker.enabled(Rule::DjangoNonLeadingReceiverDecorator) {
                 flake8_django::rules::non_leading_receiver_decorator(checker, decorator_list);
@@ -151,11 +143,11 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
                 flake8_pyi::rules::non_self_return_type(
                     checker,
                     stmt,
+                    *is_async,
                     name,
                     decorator_list,
                     returns.as_ref().map(AsRef::as_ref),
                     parameters,
-                    stmt.is_async_function_def_stmt(),
                 );
             }
             if checker.enabled(Rule::CustomTypeVarReturnType) {
@@ -181,12 +173,7 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
                 }
             }
             if checker.enabled(Rule::BadExitAnnotation) {
-                flake8_pyi::rules::bad_exit_annotation(
-                    checker,
-                    stmt.is_async_function_def_stmt(),
-                    name,
-                    parameters,
-                );
+                flake8_pyi::rules::bad_exit_annotation(checker, *is_async, name, parameters);
             }
             if checker.enabled(Rule::RedundantNumericUnion) {
                 flake8_pyi::rules::redundant_numeric_union(checker, parameters);
@@ -1097,8 +1084,7 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
                 pygrep_hooks::rules::non_existent_mock_method(checker, test);
             }
         }
-        Stmt::With(ast::StmtWith { items, body, .. })
-        | Stmt::AsyncWith(ast::StmtAsyncWith { items, body, .. }) => {
+        Stmt::With(with_ @ ast::StmtWith { items, body, .. }) => {
             if checker.enabled(Rule::AssertRaisesException) {
                 flake8_bugbear::rules::assert_raises_exception(checker, items);
             }
@@ -1108,8 +1094,7 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
             if checker.enabled(Rule::MultipleWithStatements) {
                 flake8_simplify::rules::multiple_with_statements(
                     checker,
-                    stmt,
-                    body,
+                    with_,
                     checker.semantic.current_statement_parent(),
                 );
             }
@@ -1134,13 +1119,6 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
             iter,
             orelse,
             ..
-        })
-        | Stmt::AsyncFor(ast::StmtAsyncFor {
-            target,
-            body,
-            iter,
-            orelse,
-            ..
         }) => {
             if checker.any_enabled(&[Rule::UnusedLoopControlVariable, Rule::IncorrectDictIterator])
             {
@@ -1339,7 +1317,7 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
                     if !checker
                         .semantic
                         .current_scopes()
-                        .any(|scope| scope.kind.is_any_function())
+                        .any(|scope| scope.kind.is_function())
                     {
                         if checker.enabled(Rule::UnprefixedTypeParam) {
                             flake8_pyi::rules::prefix_type_params(checker, value, targets);
@@ -1404,7 +1382,7 @@ pub(crate) fn statement(stmt: &Stmt, checker: &mut Checker) {
                         if !checker
                             .semantic
                             .current_scopes()
-                            .any(|scope| scope.kind.is_any_function())
+                            .any(|scope| scope.kind.is_function())
                         {
                             flake8_pyi::rules::annotated_assignment_default_in_stub(
                                 checker, target, value, annotation,
diff --git a/crates/ruff/src/checkers/ast/mod.rs b/crates/ruff/src/checkers/ast/mod.rs
index 4b6972ead1..030ea33af9 100644
--- a/crates/ruff/src/checkers/ast/mod.rs
+++ b/crates/ruff/src/checkers/ast/mod.rs
@@ -462,14 +462,6 @@ where
                 returns,
                 type_params,
                 ..
-            })
-            | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef {
-                body,
-                parameters,
-                decorator_list,
-                type_params,
-                returns,
-                ..
             }) => {
                 // Visit the decorators and arguments, but avoid the body, which will be
                 // deferred.
@@ -540,8 +532,7 @@ where
 
                 self.semantic.push_scope(match &stmt {
                     Stmt::FunctionDef(stmt) => ScopeKind::Function(stmt),
-                    Stmt::AsyncFunctionDef(stmt) => ScopeKind::AsyncFunction(stmt),
-                    _ => unreachable!("Expected Stmt::FunctionDef | Stmt::AsyncFunctionDef"),
+                    _ => unreachable!("Expected Stmt::FunctionDef"),
                 });
 
                 self.deferred.functions.push(self.semantic.snapshot());
@@ -743,8 +734,7 @@ where
 
         // Step 3: Clean-up
         match stmt {
-            Stmt::FunctionDef(ast::StmtFunctionDef { name, .. })
-            | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef { name, .. }) => {
+            Stmt::FunctionDef(ast::StmtFunctionDef { name, .. }) => {
                 let scope_id = self.semantic.scope_id;
                 self.deferred.scopes.push(scope_id);
                 self.semantic.pop_scope(); // Function scope
@@ -1626,7 +1616,7 @@ impl<'a> Checker<'a> {
             return;
         }
 
-        if matches!(parent, Stmt::For(_) | Stmt::AsyncFor(_)) {
+        if parent.is_for_stmt() {
             self.add_binding(
                 id,
                 expr.range(),
@@ -1825,19 +1815,14 @@ impl<'a> Checker<'a> {
             for snapshot in deferred_functions {
                 self.semantic.restore(snapshot);
 
-                match &self.semantic.current_statement() {
-                    Stmt::FunctionDef(ast::StmtFunctionDef {
-                        body, parameters, ..
-                    })
-                    | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef {
-                        body, parameters, ..
-                    }) => {
-                        self.visit_parameters(parameters);
-                        self.visit_body(body);
-                    }
-                    _ => {
-                        unreachable!("Expected Stmt::FunctionDef | Stmt::AsyncFunctionDef")
-                    }
+                if let Stmt::FunctionDef(ast::StmtFunctionDef {
+                    body, parameters, ..
+                }) = self.semantic.current_statement()
+                {
+                    self.visit_parameters(parameters);
+                    self.visit_body(body);
+                } else {
+                    unreachable!("Expected Stmt::FunctionDef")
                 }
             }
         }
diff --git a/crates/ruff/src/docstrings/extraction.rs b/crates/ruff/src/docstrings/extraction.rs
index 3a2fdb7660..84cdba07e2 100644
--- a/crates/ruff/src/docstrings/extraction.rs
+++ b/crates/ruff/src/docstrings/extraction.rs
@@ -30,8 +30,7 @@ pub(crate) fn extract_docstring<'a>(definition: &'a Definition<'a>) -> Option<&'
         Definition::Module(module) => docstring_from(module.python_ast),
         Definition::Member(member) => {
             if let Stmt::ClassDef(ast::StmtClassDef { body, .. })
-            | Stmt::FunctionDef(ast::StmtFunctionDef { body, .. })
-            | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef { body, .. }) = &member.stmt
+            | Stmt::FunctionDef(ast::StmtFunctionDef { body, .. }) = &member.stmt
             {
                 docstring_from(body)
             } else {
diff --git a/crates/ruff/src/rules/flake8_annotations/helpers.rs b/crates/ruff/src/rules/flake8_annotations/helpers.rs
index b1572efd82..04ecc41290 100644
--- a/crates/ruff/src/rules/flake8_annotations/helpers.rs
+++ b/crates/ruff/src/rules/flake8_annotations/helpers.rs
@@ -15,14 +15,6 @@ pub(super) fn match_function_def(
             body,
             decorator_list,
             ..
-        })
-        | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef {
-            name,
-            parameters,
-            returns,
-            body,
-            decorator_list,
-            ..
         }) => (
             name,
             parameters,
diff --git a/crates/ruff/src/rules/flake8_bugbear/rules/abstract_base_class.rs b/crates/ruff/src/rules/flake8_bugbear/rules/abstract_base_class.rs
index 8b69b2cf61..43307aa5c1 100644
--- a/crates/ruff/src/rules/flake8_bugbear/rules/abstract_base_class.rs
+++ b/crates/ruff/src/rules/flake8_bugbear/rules/abstract_base_class.rs
@@ -159,18 +159,12 @@ pub(crate) fn abstract_base_class(
             continue;
         }
 
-        let (Stmt::FunctionDef(ast::StmtFunctionDef {
+        let Stmt::FunctionDef(ast::StmtFunctionDef {
             decorator_list,
             body,
             name: method_name,
             ..
-        })
-        | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef {
-            decorator_list,
-            body,
-            name: method_name,
-            ..
-        })) = stmt
+        }) = stmt
         else {
             continue;
         };
diff --git a/crates/ruff/src/rules/flake8_bugbear/rules/function_uses_loop_variable.rs b/crates/ruff/src/rules/flake8_bugbear/rules/function_uses_loop_variable.rs
index 500acd9015..b0291c21b6 100644
--- a/crates/ruff/src/rules/flake8_bugbear/rules/function_uses_loop_variable.rs
+++ b/crates/ruff/src/rules/flake8_bugbear/rules/function_uses_loop_variable.rs
@@ -86,9 +86,6 @@ impl<'a> Visitor<'a> for SuspiciousVariablesVisitor<'a> {
         match stmt {
             Stmt::FunctionDef(ast::StmtFunctionDef {
                 parameters, body, ..
-            })
-            | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef {
-                parameters, body, ..
             }) => {
                 // Collect all loaded variable names.
                 let mut visitor = LoadedNamesVisitor::default();
@@ -236,7 +233,7 @@ struct AssignedNamesVisitor<'a> {
 /// `Visitor` to collect all used identifiers in a statement.
 impl<'a> Visitor<'a> for AssignedNamesVisitor<'a> {
     fn visit_stmt(&mut self, stmt: &'a Stmt) {
-        if matches!(stmt, Stmt::FunctionDef(_) | Stmt::AsyncFunctionDef(_)) {
+        if stmt.is_function_def_stmt() {
             // Don't recurse.
             return;
         }
@@ -251,8 +248,7 @@ impl<'a> Visitor<'a> for AssignedNamesVisitor<'a> {
             }
             Stmt::AugAssign(ast::StmtAugAssign { target, .. })
             | Stmt::AnnAssign(ast::StmtAnnAssign { target, .. })
-            | Stmt::For(ast::StmtFor { target, .. })
-            | Stmt::AsyncFor(ast::StmtAsyncFor { target, .. }) => {
+            | Stmt::For(ast::StmtFor { target, .. }) => {
                 let mut visitor = NamesFromAssignmentsVisitor::default();
                 visitor.visit_expr(target);
                 self.names.extend(visitor.names);
diff --git a/crates/ruff/src/rules/flake8_bugbear/rules/jump_statement_in_finally.rs b/crates/ruff/src/rules/flake8_bugbear/rules/jump_statement_in_finally.rs
index df83409f2e..2d796f4706 100644
--- a/crates/ruff/src/rules/flake8_bugbear/rules/jump_statement_in_finally.rs
+++ b/crates/ruff/src/rules/flake8_bugbear/rules/jump_statement_in_finally.rs
@@ -69,16 +69,13 @@ fn walk_stmt(checker: &mut Checker, body: &[Stmt], f: fn(&Stmt) -> bool) {
             ));
         }
         match stmt {
-            Stmt::While(ast::StmtWhile { body, .. })
-            | Stmt::For(ast::StmtFor { body, .. })
-            | Stmt::AsyncFor(ast::StmtAsyncFor { body, .. }) => {
+            Stmt::While(ast::StmtWhile { body, .. }) | Stmt::For(ast::StmtFor { body, .. }) => {
                 walk_stmt(checker, body, Stmt::is_return_stmt);
             }
             Stmt::If(ast::StmtIf { body, .. })
             | Stmt::Try(ast::StmtTry { body, .. })
             | Stmt::TryStar(ast::StmtTryStar { body, .. })
-            | Stmt::With(ast::StmtWith { body, .. })
-            | Stmt::AsyncWith(ast::StmtAsyncWith { body, .. }) => {
+            | Stmt::With(ast::StmtWith { body, .. }) => {
                 walk_stmt(checker, body, f);
             }
             Stmt::Match(ast::StmtMatch { cases, .. }) => {
diff --git a/crates/ruff/src/rules/flake8_pyi/rules/iter_method_return_iterable.rs b/crates/ruff/src/rules/flake8_pyi/rules/iter_method_return_iterable.rs
index a3f9c1b2c1..1be0eec92f 100644
--- a/crates/ruff/src/rules/flake8_pyi/rules/iter_method_return_iterable.rs
+++ b/crates/ruff/src/rules/flake8_pyi/rules/iter_method_return_iterable.rs
@@ -49,14 +49,14 @@ use crate::checkers::ast::Checker;
 /// ```
 #[violation]
 pub struct IterMethodReturnIterable {
-    async_: bool,
+    is_async: bool,
 }
 
 impl Violation for IterMethodReturnIterable {
     #[derive_message_formats]
     fn message(&self) -> String {
-        let IterMethodReturnIterable { async_ } = self;
-        if *async_ {
+        let IterMethodReturnIterable { is_async } = self;
+        if *is_async {
             format!("`__aiter__` methods should return an `AsyncIterator`, not an `AsyncIterable`")
         } else {
             format!("`__iter__` methods should return an `Iterator`, not an `Iterable`")
@@ -91,7 +91,7 @@ pub(crate) fn iter_method_return_iterable(checker: &mut Checker, definition: &De
         returns
     };
 
-    let async_ = match name.as_str() {
+    let is_async = match name.as_str() {
         "__iter__" => false,
         "__aiter__" => true,
         _ => return,
@@ -101,7 +101,7 @@ pub(crate) fn iter_method_return_iterable(checker: &mut Checker, definition: &De
         .semantic()
         .resolve_call_path(annotation)
         .is_some_and(|call_path| {
-            if async_ {
+            if is_async {
                 matches!(
                     call_path.as_slice(),
                     ["typing", "AsyncIterable"] | ["collections", "abc", "AsyncIterable"]
@@ -115,7 +115,7 @@ pub(crate) fn iter_method_return_iterable(checker: &mut Checker, definition: &De
         })
     {
         checker.diagnostics.push(Diagnostic::new(
-            IterMethodReturnIterable { async_ },
+            IterMethodReturnIterable { is_async },
             returns.range(),
         ));
     }
diff --git a/crates/ruff/src/rules/flake8_pyi/rules/non_self_return_type.rs b/crates/ruff/src/rules/flake8_pyi/rules/non_self_return_type.rs
index f4b9e32ea2..0f251297cb 100644
--- a/crates/ruff/src/rules/flake8_pyi/rules/non_self_return_type.rs
+++ b/crates/ruff/src/rules/flake8_pyi/rules/non_self_return_type.rs
@@ -113,11 +113,11 @@ impl Violation for NonSelfReturnType {
 pub(crate) fn non_self_return_type(
     checker: &mut Checker,
     stmt: &Stmt,
+    is_async: bool,
     name: &str,
     decorator_list: &[Decorator],
     returns: Option<&Expr>,
     parameters: &Parameters,
-    async_: bool,
 ) {
     let ScopeKind::Class(class_def) = checker.semantic().current_scope().kind else {
         return;
@@ -138,7 +138,7 @@ pub(crate) fn non_self_return_type(
         return;
     }
 
-    if async_ {
+    if is_async {
         if name == "__aenter__"
             && is_name(returns, &class_def.name)
             && !is_final(&class_def.decorator_list, checker.semantic())
diff --git a/crates/ruff/src/rules/flake8_pytest_style/rules/fixture.rs b/crates/ruff/src/rules/flake8_pytest_style/rules/fixture.rs
index 63352d2ffa..0a95d0cb60 100644
--- a/crates/ruff/src/rules/flake8_pytest_style/rules/fixture.rs
+++ b/crates/ruff/src/rules/flake8_pytest_style/rules/fixture.rs
@@ -448,7 +448,7 @@ where
                     self.has_return_with_value = true;
                 }
             }
-            Stmt::FunctionDef(_) | Stmt::AsyncFunctionDef(_) => {}
+            Stmt::FunctionDef(_) => {}
             _ => visitor::walk_stmt(self, stmt),
         }
     }
diff --git a/crates/ruff/src/rules/flake8_pytest_style/rules/raises.rs b/crates/ruff/src/rules/flake8_pytest_style/rules/raises.rs
index c8c824648b..f44ad46824 100644
--- a/crates/ruff/src/rules/flake8_pytest_style/rules/raises.rs
+++ b/crates/ruff/src/rules/flake8_pytest_style/rules/raises.rs
@@ -195,12 +195,9 @@ pub(crate) fn complex_raises(
     if raises_called {
         let is_too_complex = if let [stmt] = body {
             match stmt {
-                Stmt::With(ast::StmtWith { body, .. })
-                | Stmt::AsyncWith(ast::StmtAsyncWith { body, .. }) => {
-                    is_non_trivial_with_body(body)
-                }
+                Stmt::With(ast::StmtWith { body, .. }) => is_non_trivial_with_body(body),
                 // Allow function and class definitions to test decorators
-                Stmt::ClassDef(_) | Stmt::FunctionDef(_) | Stmt::AsyncFunctionDef(_) => false,
+                Stmt::ClassDef(_) | Stmt::FunctionDef(_) => false,
                 stmt => is_compound_statement(stmt),
             }
         } else {
diff --git a/crates/ruff/src/rules/flake8_return/rules/function.rs b/crates/ruff/src/rules/flake8_return/rules/function.rs
index 00675beb65..90dfb25173 100644
--- a/crates/ruff/src/rules/flake8_return/rules/function.rs
+++ b/crates/ruff/src/rules/flake8_return/rules/function.rs
@@ -425,9 +425,7 @@ fn implicit_return(checker: &mut Checker, stmt: &Stmt) {
         }
         Stmt::Assert(ast::StmtAssert { test, .. }) if is_const_false(test) => {}
         Stmt::While(ast::StmtWhile { test, .. }) if is_const_true(test) => {}
-        Stmt::For(ast::StmtFor { orelse, .. })
-        | Stmt::AsyncFor(ast::StmtAsyncFor { orelse, .. })
-        | Stmt::While(ast::StmtWhile { orelse, .. }) => {
+        Stmt::For(ast::StmtFor { orelse, .. }) | Stmt::While(ast::StmtWhile { orelse, .. }) => {
             if let Some(last_stmt) = orelse.last() {
                 implicit_return(checker, last_stmt);
             } else {
@@ -454,8 +452,7 @@ fn implicit_return(checker: &mut Checker, stmt: &Stmt) {
                 }
             }
         }
-        Stmt::With(ast::StmtWith { body, .. })
-        | Stmt::AsyncWith(ast::StmtAsyncWith { body, .. }) => {
+        Stmt::With(ast::StmtWith { body, .. }) => {
             if let Some(last_stmt) = body.last() {
                 implicit_return(checker, last_stmt);
             }
diff --git a/crates/ruff/src/rules/flake8_return/visitor.rs b/crates/ruff/src/rules/flake8_return/visitor.rs
index 80bc2f8d7d..775c3356e5 100644
--- a/crates/ruff/src/rules/flake8_return/visitor.rs
+++ b/crates/ruff/src/rules/flake8_return/visitor.rs
@@ -50,12 +50,6 @@ impl<'a> Visitor<'a> for ReturnVisitor<'a> {
                 decorator_list,
                 returns,
                 ..
-            })
-            | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef {
-                parameters,
-                decorator_list,
-                returns,
-                ..
             }) => {
                 // Visit the decorators, etc.
                 self.sibling = Some(stmt);
@@ -101,8 +95,7 @@ impl<'a> Visitor<'a> for ReturnVisitor<'a> {
                         //         x = f.read()
                         //     return x
                         // ```
-                        Stmt::With(ast::StmtWith { body, .. })
-                        | Stmt::AsyncWith(ast::StmtAsyncWith { body, .. }) => {
+                        Stmt::With(ast::StmtWith { body, .. }) => {
                             if let Some(stmt_assign) = body.last().and_then(Stmt::as_assign_stmt) {
                                 self.stack
                                     .assignment_return
diff --git a/crates/ruff/src/rules/flake8_simplify/rules/ast_unary_op.rs b/crates/ruff/src/rules/flake8_simplify/rules/ast_unary_op.rs
index c2aa396b17..f5da2c443b 100644
--- a/crates/ruff/src/rules/flake8_simplify/rules/ast_unary_op.rs
+++ b/crates/ruff/src/rules/flake8_simplify/rules/ast_unary_op.rs
@@ -160,8 +160,7 @@ pub(crate) fn negation_with_equal_op(
     }
 
     // Avoid flagging issues in dunder implementations.
-    if let ScopeKind::Function(ast::StmtFunctionDef { name, .. })
-    | ScopeKind::AsyncFunction(ast::StmtAsyncFunctionDef { name, .. }) =
+    if let ScopeKind::Function(ast::StmtFunctionDef { name, .. }) =
         &checker.semantic().current_scope().kind
     {
         if is_dunder_method(name) {
@@ -218,8 +217,7 @@ pub(crate) fn negation_with_not_equal_op(
     }
 
     // Avoid flagging issues in dunder implementations.
-    if let ScopeKind::Function(ast::StmtFunctionDef { name, .. })
-    | ScopeKind::AsyncFunction(ast::StmtAsyncFunctionDef { name, .. }) =
+    if let ScopeKind::Function(ast::StmtFunctionDef { name, .. }) =
         &checker.semantic().current_scope().kind
     {
         if is_dunder_method(name) {
diff --git a/crates/ruff/src/rules/flake8_simplify/rules/ast_with.rs b/crates/ruff/src/rules/flake8_simplify/rules/ast_with.rs
index 55c5d0d781..528b82e050 100644
--- a/crates/ruff/src/rules/flake8_simplify/rules/ast_with.rs
+++ b/crates/ruff/src/rules/flake8_simplify/rules/ast_with.rs
@@ -63,18 +63,22 @@ impl Violation for MultipleWithStatements {
 /// Returns a boolean indicating whether it's an async with statement, the items
 /// and body.
 fn next_with(body: &[Stmt]) -> Option<(bool, &[WithItem], &[Stmt])> {
-    match body {
-        [Stmt::With(ast::StmtWith { items, body, .. })] => Some((false, items, body)),
-        [Stmt::AsyncWith(ast::StmtAsyncWith { items, body, .. })] => Some((true, items, body)),
-        _ => None,
-    }
+    let [Stmt::With(ast::StmtWith {
+        is_async,
+        items,
+        body,
+        ..
+    })] = body
+    else {
+        return None;
+    };
+    Some((*is_async, items, body))
 }
 
 /// SIM117
 pub(crate) fn multiple_with_statements(
     checker: &mut Checker,
-    with_stmt: &Stmt,
-    with_body: &[Stmt],
+    with_stmt: &ast::StmtWith,
     with_parent: Option<&Stmt>,
 ) {
     // Make sure we fix from top to bottom for nested with statements, e.g. for
@@ -102,8 +106,8 @@ pub(crate) fn multiple_with_statements(
         }
     }
 
-    if let Some((is_async, items, body)) = next_with(with_body) {
-        if is_async != with_stmt.is_async_with_stmt() {
+    if let Some((is_async, items, body)) = next_with(&with_stmt.body) {
+        if is_async != with_stmt.is_async {
             // One of the statements is an async with, while the other is not,
             // we can't merge those statements.
             return;
@@ -133,7 +137,7 @@ pub(crate) fn multiple_with_statements(
             if !checker
                 .indexer()
                 .comment_ranges()
-                .intersects(TextRange::new(with_stmt.start(), with_body[0].start()))
+                .intersects(TextRange::new(with_stmt.start(), with_stmt.body[0].start()))
             {
                 match fix_with::fix_multiple_with_statements(
                     checker.locator(),
diff --git a/crates/ruff/src/rules/flake8_simplify/rules/fix_with.rs b/crates/ruff/src/rules/flake8_simplify/rules/fix_with.rs
index d5dc5ca9d8..36d1f6eb96 100644
--- a/crates/ruff/src/rules/flake8_simplify/rules/fix_with.rs
+++ b/crates/ruff/src/rules/flake8_simplify/rules/fix_with.rs
@@ -1,6 +1,6 @@
 use anyhow::{bail, Result};
 use libcst_native::{CompoundStatement, Statement, Suite, With};
-use ruff_python_ast::Ranged;
+use ruff_python_ast::{self as ast, Ranged};
 
 use crate::autofix::codemods::CodegenStylist;
 use ruff_diagnostics::Edit;
@@ -14,15 +14,15 @@ use crate::cst::matchers::{match_function_def, match_indented_block, match_state
 pub(crate) fn fix_multiple_with_statements(
     locator: &Locator,
     stylist: &Stylist,
-    stmt: &ruff_python_ast::Stmt,
+    with_stmt: &ast::StmtWith,
 ) -> Result<Edit> {
     // Infer the indentation of the outer block.
-    let Some(outer_indent) = whitespace::indentation(locator, stmt) else {
+    let Some(outer_indent) = whitespace::indentation(locator, with_stmt) else {
         bail!("Unable to fix multiline statement");
     };
 
     // Extract the module text.
-    let contents = locator.lines(stmt.range());
+    let contents = locator.lines(with_stmt.range());
 
     // If the block is indented, "embed" it in a function definition, to preserve
     // indentation while retaining valid source code. (We'll strip the prefix later
@@ -82,7 +82,7 @@ pub(crate) fn fix_multiple_with_statements(
             .to_string()
     };
 
-    let range = locator.lines_range(stmt.range());
+    let range = locator.lines_range(with_stmt.range());
 
     Ok(Edit::range_replacement(contents, range))
 }
diff --git a/crates/ruff/src/rules/flake8_simplify/rules/reimplemented_builtin.rs b/crates/ruff/src/rules/flake8_simplify/rules/reimplemented_builtin.rs
index 989036b0e4..257c080349 100644
--- a/crates/ruff/src/rules/flake8_simplify/rules/reimplemented_builtin.rs
+++ b/crates/ruff/src/rules/flake8_simplify/rules/reimplemented_builtin.rs
@@ -60,7 +60,7 @@ impl Violation for ReimplementedBuiltin {
 
 /// SIM110, SIM111
 pub(crate) fn convert_for_loop_to_any_all(checker: &mut Checker, stmt: &Stmt) {
-    if !checker.semantic().current_scope().kind.is_any_function() {
+    if !checker.semantic().current_scope().kind.is_function() {
         return;
     }
 
diff --git a/crates/ruff/src/rules/flake8_unused_arguments/rules/unused_arguments.rs b/crates/ruff/src/rules/flake8_unused_arguments/rules/unused_arguments.rs
index b6bc1e23b7..5699bf8e01 100644
--- a/crates/ruff/src/rules/flake8_unused_arguments/rules/unused_arguments.rs
+++ b/crates/ruff/src/rules/flake8_unused_arguments/rules/unused_arguments.rs
@@ -328,13 +328,6 @@ pub(crate) fn unused_arguments(
             body,
             decorator_list,
             ..
-        })
-        | ScopeKind::AsyncFunction(ast::StmtAsyncFunctionDef {
-            name,
-            parameters,
-            body,
-            decorator_list,
-            ..
         }) => {
             match function_type::classify(
                 name,
diff --git a/crates/ruff/src/rules/isort/block.rs b/crates/ruff/src/rules/isort/block.rs
index f5a2607d8b..3832444b4c 100644
--- a/crates/ruff/src/rules/isort/block.rs
+++ b/crates/ruff/src/rules/isort/block.rs
@@ -89,7 +89,7 @@ impl<'a> BlockBuilder<'a> {
             // sibling (i.e., as if the comment is the next statement, as
             // opposed to the class or function).
             match stmt {
-                Stmt::FunctionDef(_) | Stmt::AsyncFunctionDef(_) => {
+                Stmt::FunctionDef(_) => {
                     if helpers::has_comment_break(stmt, self.locator) {
                         Trailer::Sibling
                     } else {
@@ -196,12 +196,6 @@ where
                 }
                 self.finalize(None);
             }
-            Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef { body, .. }) => {
-                for stmt in body {
-                    self.visit_stmt(stmt);
-                }
-                self.finalize(None);
-            }
             Stmt::ClassDef(ast::StmtClassDef { body, .. }) => {
                 for stmt in body {
                     self.visit_stmt(stmt);
@@ -219,17 +213,6 @@ where
                 }
                 self.finalize(None);
             }
-            Stmt::AsyncFor(ast::StmtAsyncFor { body, orelse, .. }) => {
-                for stmt in body {
-                    self.visit_stmt(stmt);
-                }
-                self.finalize(None);
-
-                for stmt in orelse {
-                    self.visit_stmt(stmt);
-                }
-                self.finalize(None);
-            }
             Stmt::While(ast::StmtWhile { body, orelse, .. }) => {
                 for stmt in body {
                     self.visit_stmt(stmt);
@@ -261,12 +244,6 @@ where
                 }
                 self.finalize(None);
             }
-            Stmt::AsyncWith(ast::StmtAsyncWith { body, .. }) => {
-                for stmt in body {
-                    self.visit_stmt(stmt);
-                }
-                self.finalize(None);
-            }
             Stmt::Match(ast::StmtMatch { cases, .. }) => {
                 for match_case in cases {
                     self.visit_match_case(match_case);
diff --git a/crates/ruff/src/rules/mccabe/rules/function_is_too_complex.rs b/crates/ruff/src/rules/mccabe/rules/function_is_too_complex.rs
index 927ae37b5c..60938d334c 100644
--- a/crates/ruff/src/rules/mccabe/rules/function_is_too_complex.rs
+++ b/crates/ruff/src/rules/mccabe/rules/function_is_too_complex.rs
@@ -82,14 +82,12 @@ fn get_complexity_number(stmts: &[Stmt]) -> usize {
                     complexity += get_complexity_number(&clause.body);
                 }
             }
-            Stmt::For(ast::StmtFor { body, orelse, .. })
-            | Stmt::AsyncFor(ast::StmtAsyncFor { body, orelse, .. }) => {
+            Stmt::For(ast::StmtFor { body, orelse, .. }) => {
                 complexity += 1;
                 complexity += get_complexity_number(body);
                 complexity += get_complexity_number(orelse);
             }
-            Stmt::With(ast::StmtWith { body, .. })
-            | Stmt::AsyncWith(ast::StmtAsyncWith { body, .. }) => {
+            Stmt::With(ast::StmtWith { body, .. }) => {
                 complexity += get_complexity_number(body);
             }
             Stmt::While(ast::StmtWhile { body, orelse, .. }) => {
@@ -131,8 +129,7 @@ fn get_complexity_number(stmts: &[Stmt]) -> usize {
                     complexity += get_complexity_number(body);
                 }
             }
-            Stmt::FunctionDef(ast::StmtFunctionDef { body, .. })
-            | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef { body, .. }) => {
+            Stmt::FunctionDef(ast::StmtFunctionDef { body, .. }) => {
                 complexity += 1;
                 complexity += get_complexity_number(body);
             }
diff --git a/crates/ruff/src/rules/pycodestyle/rules/lambda_assignment.rs b/crates/ruff/src/rules/pycodestyle/rules/lambda_assignment.rs
index 7ae7764574..d06d032d4e 100644
--- a/crates/ruff/src/rules/pycodestyle/rules/lambda_assignment.rs
+++ b/crates/ruff/src/rules/pycodestyle/rules/lambda_assignment.rs
@@ -220,6 +220,7 @@ fn function(
                 })
                 .collect::<Vec<_>>();
             let func = Stmt::FunctionDef(ast::StmtFunctionDef {
+                is_async: false,
                 name: Identifier::new(name.to_string(), TextRange::default()),
                 parameters: Box::new(Parameters {
                     posonlyargs: new_posonlyargs,
@@ -236,6 +237,7 @@ fn function(
         }
     }
     let func = Stmt::FunctionDef(ast::StmtFunctionDef {
+        is_async: false,
         name: Identifier::new(name.to_string(), TextRange::default()),
         parameters: Box::new(parameters.clone()),
         body: vec![body],
diff --git a/crates/ruff/src/rules/pydocstyle/rules/sections.rs b/crates/ruff/src/rules/pydocstyle/rules/sections.rs
index 001e5830ff..38f49dbdfe 100644
--- a/crates/ruff/src/rules/pydocstyle/rules/sections.rs
+++ b/crates/ruff/src/rules/pydocstyle/rules/sections.rs
@@ -1726,9 +1726,7 @@ fn missing_args(checker: &mut Checker, docstring: &Docstring, docstrings_args: &
         return;
     };
 
-    let (Stmt::FunctionDef(ast::StmtFunctionDef { parameters, .. })
-    | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef { parameters, .. })) = stmt
-    else {
+    let Stmt::FunctionDef(ast::StmtFunctionDef { parameters, .. }) = stmt else {
         return;
     };
 
diff --git a/crates/ruff/src/rules/pyflakes/rules/break_outside_loop.rs b/crates/ruff/src/rules/pyflakes/rules/break_outside_loop.rs
index cfe9323c43..0fb29fcc04 100644
--- a/crates/ruff/src/rules/pyflakes/rules/break_outside_loop.rs
+++ b/crates/ruff/src/rules/pyflakes/rules/break_outside_loop.rs
@@ -36,14 +36,12 @@ pub(crate) fn break_outside_loop<'a>(
     let mut child = stmt;
     for parent in parents {
         match parent {
-            Stmt::For(ast::StmtFor { orelse, .. })
-            | Stmt::AsyncFor(ast::StmtAsyncFor { orelse, .. })
-            | Stmt::While(ast::StmtWhile { orelse, .. }) => {
+            Stmt::For(ast::StmtFor { orelse, .. }) | Stmt::While(ast::StmtWhile { orelse, .. }) => {
                 if !orelse.contains(child) {
                     return None;
                 }
             }
-            Stmt::FunctionDef(_) | Stmt::AsyncFunctionDef(_) | Stmt::ClassDef(_) => {
+            Stmt::FunctionDef(_) | Stmt::ClassDef(_) => {
                 break;
             }
             _ => {}
diff --git a/crates/ruff/src/rules/pyflakes/rules/continue_outside_loop.rs b/crates/ruff/src/rules/pyflakes/rules/continue_outside_loop.rs
index 5e773e4095..15a0accc9c 100644
--- a/crates/ruff/src/rules/pyflakes/rules/continue_outside_loop.rs
+++ b/crates/ruff/src/rules/pyflakes/rules/continue_outside_loop.rs
@@ -36,14 +36,12 @@ pub(crate) fn continue_outside_loop<'a>(
     let mut child = stmt;
     for parent in parents {
         match parent {
-            Stmt::For(ast::StmtFor { orelse, .. })
-            | Stmt::AsyncFor(ast::StmtAsyncFor { orelse, .. })
-            | Stmt::While(ast::StmtWhile { orelse, .. }) => {
+            Stmt::For(ast::StmtFor { orelse, .. }) | Stmt::While(ast::StmtWhile { orelse, .. }) => {
                 if !orelse.contains(child) {
                     return None;
                 }
             }
-            Stmt::FunctionDef(_) | Stmt::AsyncFunctionDef(_) | Stmt::ClassDef(_) => {
+            Stmt::FunctionDef(_) | Stmt::ClassDef(_) => {
                 break;
             }
             _ => {}
diff --git a/crates/ruff/src/rules/pyflakes/rules/undefined_local.rs b/crates/ruff/src/rules/pyflakes/rules/undefined_local.rs
index 43c4eda595..e4f931a7bc 100644
--- a/crates/ruff/src/rules/pyflakes/rules/undefined_local.rs
+++ b/crates/ruff/src/rules/pyflakes/rules/undefined_local.rs
@@ -51,7 +51,7 @@ pub(crate) fn undefined_local(
     scope: &Scope,
     diagnostics: &mut Vec<Diagnostic>,
 ) {
-    if scope.kind.is_any_function() {
+    if scope.kind.is_function() {
         for (name, binding_id) in scope.bindings() {
             // If the variable shadows a binding in a parent scope...
             if let Some(shadowed_id) = checker.semantic().shadowed_binding(binding_id) {
diff --git a/crates/ruff/src/rules/pyflakes/rules/unused_variable.rs b/crates/ruff/src/rules/pyflakes/rules/unused_variable.rs
index e91407a7ca..dd3ff4c7c7 100644
--- a/crates/ruff/src/rules/pyflakes/rules/unused_variable.rs
+++ b/crates/ruff/src/rules/pyflakes/rules/unused_variable.rs
@@ -299,7 +299,7 @@ fn remove_unused_variable(
 
 /// F841
 pub(crate) fn unused_variable(checker: &Checker, scope: &Scope, diagnostics: &mut Vec<Diagnostic>) {
-    if scope.uses_locals() && scope.kind.is_any_function() {
+    if scope.uses_locals() && scope.kind.is_function() {
         return;
     }
 
diff --git a/crates/ruff/src/rules/pylint/helpers.rs b/crates/ruff/src/rules/pylint/helpers.rs
index 25ca39c544..60bb0dd223 100644
--- a/crates/ruff/src/rules/pylint/helpers.rs
+++ b/crates/ruff/src/rules/pylint/helpers.rs
@@ -24,16 +24,11 @@ pub(super) fn type_param_name(arguments: &Arguments) -> Option<&str> {
 
 pub(super) fn in_dunder_init(semantic: &SemanticModel, settings: &Settings) -> bool {
     let scope = semantic.current_scope();
-    let (ScopeKind::Function(ast::StmtFunctionDef {
+    let ScopeKind::Function(ast::StmtFunctionDef {
         name,
         decorator_list,
         ..
-    })
-    | ScopeKind::AsyncFunction(ast::StmtAsyncFunctionDef {
-        name,
-        decorator_list,
-        ..
-    })) = scope.kind
+    }) = scope.kind
     else {
         return false;
     };
diff --git a/crates/ruff/src/rules/pylint/rules/continue_in_finally.rs b/crates/ruff/src/rules/pylint/rules/continue_in_finally.rs
index 90f75b83e4..8624f65304 100644
--- a/crates/ruff/src/rules/pylint/rules/continue_in_finally.rs
+++ b/crates/ruff/src/rules/pylint/rules/continue_in_finally.rs
@@ -69,11 +69,10 @@ fn traverse_body(checker: &mut Checker, body: &[Stmt]) {
                 traverse_body(checker, body);
                 traverse_body(checker, orelse);
             }
-            Stmt::For(ast::StmtFor { orelse, .. })
-            | Stmt::AsyncFor(ast::StmtAsyncFor { orelse, .. })
-            | Stmt::While(ast::StmtWhile { orelse, .. }) => traverse_body(checker, orelse),
-            Stmt::With(ast::StmtWith { body, .. })
-            | Stmt::AsyncWith(ast::StmtAsyncWith { body, .. }) => {
+            Stmt::For(ast::StmtFor { orelse, .. }) | Stmt::While(ast::StmtWhile { orelse, .. }) => {
+                traverse_body(checker, orelse);
+            }
+            Stmt::With(ast::StmtWith { body, .. }) => {
                 traverse_body(checker, body);
             }
             Stmt::Match(ast::StmtMatch { cases, .. }) => {
diff --git a/crates/ruff/src/rules/pylint/rules/redefined_loop_name.rs b/crates/ruff/src/rules/pylint/rules/redefined_loop_name.rs
index 870da016f6..23ec06ba31 100644
--- a/crates/ruff/src/rules/pylint/rules/redefined_loop_name.rs
+++ b/crates/ruff/src/rules/pylint/rules/redefined_loop_name.rs
@@ -147,9 +147,7 @@ impl<'a, 'b> StatementVisitor<'b> for InnerForWithAssignTargetsVisitor<'a, 'b> {
     fn visit_stmt(&mut self, stmt: &'b Stmt) {
         // Collect target expressions.
         match stmt {
-            // For and async for.
-            Stmt::For(ast::StmtFor { target, .. })
-            | Stmt::AsyncFor(ast::StmtAsyncFor { target, .. }) => {
+            Stmt::For(ast::StmtFor { target, .. }) => {
                 self.assignment_targets.extend(
                     assignment_targets_from_expr(target, self.dummy_variable_rgx).map(|expr| {
                         ExprWithInnerBindingKind {
@@ -159,7 +157,6 @@ impl<'a, 'b> StatementVisitor<'b> for InnerForWithAssignTargetsVisitor<'a, 'b> {
                     }),
                 );
             }
-            // With.
             Stmt::With(ast::StmtWith { items, .. }) => {
                 self.assignment_targets.extend(
                     assignment_targets_from_with_items(items, self.dummy_variable_rgx).map(
@@ -170,7 +167,6 @@ impl<'a, 'b> StatementVisitor<'b> for InnerForWithAssignTargetsVisitor<'a, 'b> {
                     ),
                 );
             }
-            // Assignment, augmented assignment, and annotated assignment.
             Stmt::Assign(ast::StmtAssign { targets, value, .. }) => {
                 // Check for single-target assignments which are of the
                 // form `x = cast(..., x)`.
@@ -217,8 +213,7 @@ impl<'a, 'b> StatementVisitor<'b> for InnerForWithAssignTargetsVisitor<'a, 'b> {
         // Decide whether to recurse.
         match stmt {
             // Don't recurse into blocks that create a new scope.
-            Stmt::ClassDef(_) => {}
-            Stmt::FunctionDef(_) => {}
+            Stmt::ClassDef(_) | Stmt::FunctionDef(_) => {}
             // Otherwise, do recurse.
             _ => {
                 walk_stmt(self, stmt);
@@ -339,8 +334,7 @@ fn assignment_targets_from_assign_targets<'a>(
 /// PLW2901
 pub(crate) fn redefined_loop_name(checker: &mut Checker, stmt: &Stmt) {
     let (outer_assignment_targets, inner_assignment_targets) = match stmt {
-        Stmt::With(ast::StmtWith { items, body, .. })
-        | Stmt::AsyncWith(ast::StmtAsyncWith { items, body, .. }) => {
+        Stmt::With(ast::StmtWith { items, body, .. }) => {
             let outer_assignment_targets: Vec<ExprWithOuterBindingKind> =
                 assignment_targets_from_with_items(items, &checker.settings.dummy_variable_rgx)
                     .map(|expr| ExprWithOuterBindingKind {
@@ -358,8 +352,7 @@ pub(crate) fn redefined_loop_name(checker: &mut Checker, stmt: &Stmt) {
             }
             (outer_assignment_targets, visitor.assignment_targets)
         }
-        Stmt::For(ast::StmtFor { target, body, .. })
-        | Stmt::AsyncFor(ast::StmtAsyncFor { target, body, .. }) => {
+        Stmt::For(ast::StmtFor { target, body, .. }) => {
             let outer_assignment_targets: Vec<ExprWithOuterBindingKind> =
                 assignment_targets_from_expr(target, &checker.settings.dummy_variable_rgx)
                     .map(|expr| ExprWithOuterBindingKind {
@@ -377,9 +370,7 @@ pub(crate) fn redefined_loop_name(checker: &mut Checker, stmt: &Stmt) {
             }
             (outer_assignment_targets, visitor.assignment_targets)
         }
-        _ => panic!(
-            "redefined_loop_name called on Statement that is not a With, For, AsyncWith, or AsyncFor"
-        )
+        _ => panic!("redefined_loop_name called on Statement that is not a `With` or `For`"),
     };
 
     let mut diagnostics = Vec::new();
diff --git a/crates/ruff/src/rules/pylint/rules/too_many_branches.rs b/crates/ruff/src/rules/pylint/rules/too_many_branches.rs
index bc5e459e9f..2e6e220ec8 100644
--- a/crates/ruff/src/rules/pylint/rules/too_many_branches.rs
+++ b/crates/ruff/src/rules/pylint/rules/too_many_branches.rs
@@ -108,7 +108,6 @@ fn num_branches(stmts: &[Stmt]) -> usize {
                     .sum::<usize>()
             }
             Stmt::For(ast::StmtFor { body, orelse, .. })
-            | Stmt::AsyncFor(ast::StmtAsyncFor { body, orelse, .. })
             | Stmt::While(ast::StmtWhile { body, orelse, .. }) => {
                 1 + num_branches(body)
                     + (if orelse.is_empty() {
diff --git a/crates/ruff/src/rules/pylint/rules/too_many_statements.rs b/crates/ruff/src/rules/pylint/rules/too_many_statements.rs
index 0df12604ac..4088a9e473 100644
--- a/crates/ruff/src/rules/pylint/rules/too_many_statements.rs
+++ b/crates/ruff/src/rules/pylint/rules/too_many_statements.rs
@@ -78,8 +78,7 @@ fn num_statements(stmts: &[Stmt]) -> usize {
                     count += num_statements(&clause.body);
                 }
             }
-            Stmt::For(ast::StmtFor { body, orelse, .. })
-            | Stmt::AsyncFor(ast::StmtAsyncFor { body, orelse, .. }) => {
+            Stmt::For(ast::StmtFor { body, orelse, .. }) => {
                 count += num_statements(body);
                 count += num_statements(orelse);
             }
@@ -129,7 +128,6 @@ fn num_statements(stmts: &[Stmt]) -> usize {
                 }
             }
             Stmt::FunctionDef(ast::StmtFunctionDef { body, .. })
-            | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef { body, .. })
             | Stmt::With(ast::StmtWith { body, .. }) => {
                 count += 1;
                 count += num_statements(body);
diff --git a/crates/ruff/src/rules/pylint/rules/useless_else_on_loop.rs b/crates/ruff/src/rules/pylint/rules/useless_else_on_loop.rs
index 00b0caad33..bf290b59c5 100644
--- a/crates/ruff/src/rules/pylint/rules/useless_else_on_loop.rs
+++ b/crates/ruff/src/rules/pylint/rules/useless_else_on_loop.rs
@@ -63,8 +63,7 @@ fn loop_exits_early(body: &[Stmt]) -> bool {
                     .iter()
                     .any(|clause| loop_exits_early(&clause.body))
         }
-        Stmt::With(ast::StmtWith { body, .. })
-        | Stmt::AsyncWith(ast::StmtAsyncWith { body, .. }) => loop_exits_early(body),
+        Stmt::With(ast::StmtWith { body, .. }) => loop_exits_early(body),
         Stmt::Match(ast::StmtMatch { cases, .. }) => cases
             .iter()
             .any(|MatchCase { body, .. }| loop_exits_early(body)),
@@ -91,9 +90,9 @@ fn loop_exits_early(body: &[Stmt]) -> bool {
                     }) => loop_exits_early(body),
                 })
         }
-        Stmt::For(ast::StmtFor { orelse, .. })
-        | Stmt::AsyncFor(ast::StmtAsyncFor { orelse, .. })
-        | Stmt::While(ast::StmtWhile { orelse, .. }) => loop_exits_early(orelse),
+        Stmt::For(ast::StmtFor { orelse, .. }) | Stmt::While(ast::StmtWhile { orelse, .. }) => {
+            loop_exits_early(orelse)
+        }
         Stmt::Break(_) => true,
         _ => false,
     })
diff --git a/crates/ruff/src/rules/pylint/rules/yield_from_in_async_function.rs b/crates/ruff/src/rules/pylint/rules/yield_from_in_async_function.rs
index 723a927ed4..a94f388a03 100644
--- a/crates/ruff/src/rules/pylint/rules/yield_from_in_async_function.rs
+++ b/crates/ruff/src/rules/pylint/rules/yield_from_in_async_function.rs
@@ -1,7 +1,7 @@
-use ruff_python_ast::{ExprYieldFrom, Ranged};
-
 use ruff_diagnostics::{Diagnostic, Violation};
 use ruff_macros::{derive_message_formats, violation};
+use ruff_python_ast::{self as ast, Ranged};
+use ruff_python_semantic::ScopeKind;
 
 use crate::checkers::ast::Checker;
 
@@ -37,9 +37,11 @@ impl Violation for YieldFromInAsyncFunction {
 }
 
 /// PLE1700
-pub(crate) fn yield_from_in_async_function(checker: &mut Checker, expr: &ExprYieldFrom) {
-    let scope = checker.semantic().current_scope();
-    if scope.kind.is_async_function() {
+pub(crate) fn yield_from_in_async_function(checker: &mut Checker, expr: &ast::ExprYieldFrom) {
+    if matches!(
+        checker.semantic().current_scope().kind,
+        ScopeKind::Function(ast::StmtFunctionDef { is_async: true, .. })
+    ) {
         checker
             .diagnostics
             .push(Diagnostic::new(YieldFromInAsyncFunction, expr.range()));
diff --git a/crates/ruff/src/rules/pyupgrade/rules/super_call_with_parameters.rs b/crates/ruff/src/rules/pyupgrade/rules/super_call_with_parameters.rs
index 457de15f0e..d8c6981aa0 100644
--- a/crates/ruff/src/rules/pyupgrade/rules/super_call_with_parameters.rs
+++ b/crates/ruff/src/rules/pyupgrade/rules/super_call_with_parameters.rs
@@ -83,7 +83,7 @@ pub(crate) fn super_call_with_parameters(
     let scope = checker.semantic().current_scope();
 
     // Check: are we in a Function scope?
-    if !scope.kind.is_any_function() {
+    if !scope.kind.is_function() {
         return;
     }
 
diff --git a/crates/ruff/src/rules/pyupgrade/rules/yield_in_for_loop.rs b/crates/ruff/src/rules/pyupgrade/rules/yield_in_for_loop.rs
index 12e686facb..acf96c59be 100644
--- a/crates/ruff/src/rules/pyupgrade/rules/yield_in_for_loop.rs
+++ b/crates/ruff/src/rules/pyupgrade/rules/yield_in_for_loop.rs
@@ -1,10 +1,10 @@
-use ruff_python_ast::{self as ast, Expr, ExprContext, Ranged, Stmt};
 use rustc_hash::FxHashMap;
 
 use ruff_diagnostics::{AlwaysAutofixableViolation, Diagnostic, Edit, Fix};
 use ruff_macros::{derive_message_formats, violation};
 use ruff_python_ast::statement_visitor::StatementVisitor;
 use ruff_python_ast::visitor::Visitor;
+use ruff_python_ast::{self as ast, Expr, ExprContext, Ranged, Stmt};
 use ruff_python_ast::{statement_visitor, visitor};
 use ruff_python_semantic::StatementKey;
 
@@ -120,7 +120,7 @@ impl<'a> StatementVisitor<'a> for YieldFromVisitor<'a> {
                     }
                 }
             }
-            Stmt::FunctionDef(_) | Stmt::AsyncFunctionDef(_) | Stmt::ClassDef(_) => {
+            Stmt::FunctionDef(_) | Stmt::ClassDef(_) => {
                 // Don't recurse into anything that defines a new scope.
             }
             _ => statement_visitor::walk_stmt(self, stmt),
@@ -162,39 +162,46 @@ impl<'a> Visitor<'a> for ReferenceVisitor<'a> {
 /// UP028
 pub(crate) fn yield_in_for_loop(checker: &mut Checker, stmt: &Stmt) {
     // Intentionally omit async functions.
-    if let Stmt::FunctionDef(ast::StmtFunctionDef { body, .. }) = stmt {
-        let yields = {
-            let mut visitor = YieldFromVisitor::default();
-            visitor.visit_body(body);
-            visitor.yields
-        };
+    let Stmt::FunctionDef(ast::StmtFunctionDef {
+        is_async: false,
+        body,
+        ..
+    }) = stmt
+    else {
+        return;
+    };
 
-        let references = {
-            let mut visitor = ReferenceVisitor::default();
-            visitor.visit_body(body);
-            visitor.references
-        };
+    let yields = {
+        let mut visitor = YieldFromVisitor::default();
+        visitor.visit_body(body);
+        visitor.yields
+    };
 
-        for item in yields {
-            // If any of the bound names are used outside of the loop, don't rewrite.
-            if references.iter().any(|(statement, names)| {
-                *statement != StatementKey::from(item.stmt)
-                    && *statement != StatementKey::from(item.body)
-                    && item.names.iter().any(|name| names.contains(name))
-            }) {
-                continue;
-            }
+    let references = {
+        let mut visitor = ReferenceVisitor::default();
+        visitor.visit_body(body);
+        visitor.references
+    };
 
-            let mut diagnostic = Diagnostic::new(YieldInForLoop, item.stmt.range());
-            if checker.patch(diagnostic.kind.rule()) {
-                let contents = checker.locator().slice(item.iter.range());
-                let contents = format!("yield from {contents}");
-                diagnostic.set_fix(Fix::suggested(Edit::range_replacement(
-                    contents,
-                    item.stmt.range(),
-                )));
-            }
-            checker.diagnostics.push(diagnostic);
+    for item in yields {
+        // If any of the bound names are used outside of the loop, don't rewrite.
+        if references.iter().any(|(statement, names)| {
+            *statement != StatementKey::from(item.stmt)
+                && *statement != StatementKey::from(item.body)
+                && item.names.iter().any(|name| names.contains(name))
+        }) {
+            continue;
         }
+
+        let mut diagnostic = Diagnostic::new(YieldInForLoop, item.stmt.range());
+        if checker.patch(diagnostic.kind.rule()) {
+            let contents = checker.locator().slice(item.iter.range());
+            let contents = format!("yield from {contents}");
+            diagnostic.set_fix(Fix::suggested(Edit::range_replacement(
+                contents,
+                item.stmt.range(),
+            )));
+        }
+        checker.diagnostics.push(diagnostic);
     }
 }
diff --git a/crates/ruff/src/rules/ruff/rules/unreachable.rs b/crates/ruff/src/rules/ruff/rules/unreachable.rs
index 5e2c94a226..b803fce617 100644
--- a/crates/ruff/src/rules/ruff/rules/unreachable.rs
+++ b/crates/ruff/src/rules/ruff/rules/unreachable.rs
@@ -2,8 +2,8 @@ use std::{fmt, iter, usize};
 
 use log::error;
 use ruff_python_ast::{
-    Expr, Identifier, MatchCase, Pattern, PatternMatchAs, Ranged, Stmt, StmtAsyncFor,
-    StmtAsyncWith, StmtFor, StmtMatch, StmtReturn, StmtTry, StmtTryStar, StmtWhile, StmtWith,
+    Expr, Identifier, MatchCase, Pattern, PatternMatchAs, Ranged, Stmt, StmtFor, StmtMatch,
+    StmtReturn, StmtTry, StmtTryStar, StmtWhile, StmtWith,
 };
 use ruff_text_size::{TextRange, TextSize};
 
@@ -467,7 +467,6 @@ impl<'stmt> BasicBlocksBuilder<'stmt> {
             let next = match stmt {
                 // Statements that continue to the next statement after execution.
                 Stmt::FunctionDef(_)
-                | Stmt::AsyncFunctionDef(_)
                 | Stmt::Import(_)
                 | Stmt::ImportFrom(_)
                 | Stmt::ClassDef(_)
@@ -535,12 +534,6 @@ impl<'stmt> BasicBlocksBuilder<'stmt> {
                     body,
                     orelse,
                     ..
-                })
-                | Stmt::AsyncFor(StmtAsyncFor {
-                    iter: condition,
-                    body,
-                    orelse,
-                    ..
                 }) => loop_block(self, Condition::Iterator(condition), body, orelse, after),
                 Stmt::Try(StmtTry {
                     body,
@@ -566,8 +559,7 @@ impl<'stmt> BasicBlocksBuilder<'stmt> {
                     let _ = (body, handlers, orelse, finalbody); // Silence unused code warnings.
                     self.unconditional_next_block(after)
                 }
-                Stmt::With(StmtWith { items, body, .. })
-                | Stmt::AsyncWith(StmtAsyncWith { items, body, .. }) => {
+                Stmt::With(StmtWith { items, body, .. }) => {
                     // TODO: handle `with` statements, see
                     // <https://docs.python.org/3/reference/compound_stmts.html#the-with-statement>.
                     // I recommend to `try` statements first as `with` can desugar
@@ -889,7 +881,6 @@ fn needs_next_block(stmts: &[Stmt]) -> bool {
         Stmt::Return(_) | Stmt::Raise(_) => false,
         Stmt::If(stmt) => needs_next_block(&stmt.body) || stmt.elif_else_clauses.last().map_or(true, |clause| needs_next_block(&clause.body)),
         Stmt::FunctionDef(_)
-        | Stmt::AsyncFunctionDef(_)
         | Stmt::Import(_)
         | Stmt::ImportFrom(_)
         | Stmt::ClassDef(_)
@@ -905,10 +896,8 @@ fn needs_next_block(stmts: &[Stmt]) -> bool {
         | Stmt::Break(_)
         | Stmt::Continue(_)
         | Stmt::For(_)
-        | Stmt::AsyncFor(_)
         | Stmt::While(_)
         | Stmt::With(_)
-        | Stmt::AsyncWith(_)
         | Stmt::Match(_)
         | Stmt::Try(_)
         | Stmt::TryStar(_)
@@ -923,7 +912,6 @@ fn needs_next_block(stmts: &[Stmt]) -> bool {
 fn is_control_flow_stmt(stmt: &Stmt) -> bool {
     match stmt {
         Stmt::FunctionDef(_)
-        | Stmt::AsyncFunctionDef(_)
         | Stmt::Import(_)
         | Stmt::ImportFrom(_)
         | Stmt::ClassDef(_)
@@ -937,11 +925,9 @@ fn is_control_flow_stmt(stmt: &Stmt) -> bool {
         | Stmt::Pass(_) => false,
         Stmt::Return(_)
         | Stmt::For(_)
-        | Stmt::AsyncFor(_)
         | Stmt::While(_)
         | Stmt::If(_)
         | Stmt::With(_)
-        | Stmt::AsyncWith(_)
         | Stmt::Match(_)
         | Stmt::Raise(_)
         | Stmt::Try(_)
diff --git a/crates/ruff/src/rules/tryceratops/rules/type_check_without_type_error.rs b/crates/ruff/src/rules/tryceratops/rules/type_check_without_type_error.rs
index 208f9d3ff9..91e1d25b4c 100644
--- a/crates/ruff/src/rules/tryceratops/rules/type_check_without_type_error.rs
+++ b/crates/ruff/src/rules/tryceratops/rules/type_check_without_type_error.rs
@@ -55,7 +55,7 @@ where
 {
     fn visit_stmt(&mut self, stmt: &'b Stmt) {
         match stmt {
-            Stmt::FunctionDef(_) | Stmt::AsyncFunctionDef(_) | Stmt::ClassDef(_) => {
+            Stmt::FunctionDef(_) | Stmt::ClassDef(_) => {
                 // Don't recurse.
             }
             Stmt::Return(_) => self.returns.push(stmt),
diff --git a/crates/ruff_python_ast/src/cast.rs b/crates/ruff_python_ast/src/cast.rs
index 1b59f69b20..6246442ed7 100644
--- a/crates/ruff_python_ast/src/cast.rs
+++ b/crates/ruff_python_ast/src/cast.rs
@@ -1,19 +1,15 @@
 use crate::{nodes, Decorator, Stmt};
 
 pub fn name(stmt: &Stmt) -> &str {
-    match stmt {
-        Stmt::FunctionDef(nodes::StmtFunctionDef { name, .. })
-        | Stmt::AsyncFunctionDef(nodes::StmtAsyncFunctionDef { name, .. }) => name.as_str(),
-        _ => panic!("Expected Stmt::FunctionDef | Stmt::AsyncFunctionDef"),
-    }
+    let Stmt::FunctionDef(nodes::StmtFunctionDef { name, .. }) = stmt else {
+        panic!("Expected Stmt::FunctionDef")
+    };
+    name.as_str()
 }
 
 pub fn decorator_list(stmt: &Stmt) -> &[Decorator] {
-    match stmt {
-        Stmt::FunctionDef(nodes::StmtFunctionDef { decorator_list, .. })
-        | Stmt::AsyncFunctionDef(nodes::StmtAsyncFunctionDef { decorator_list, .. }) => {
-            decorator_list
-        }
-        _ => panic!("Expected Stmt::FunctionDef | Stmt::AsyncFunctionDef"),
-    }
+    let Stmt::FunctionDef(nodes::StmtFunctionDef { decorator_list, .. }) = stmt else {
+        panic!("Expected Stmt::FunctionDef")
+    };
+    decorator_list
 }
diff --git a/crates/ruff_python_ast/src/comparable.rs b/crates/ruff_python_ast/src/comparable.rs
index 107e079128..71b546a342 100644
--- a/crates/ruff_python_ast/src/comparable.rs
+++ b/crates/ruff_python_ast/src/comparable.rs
@@ -950,16 +950,7 @@ impl<'a> From<&'a ast::Expr> for ComparableExpr<'a> {
 
 #[derive(Debug, PartialEq, Eq, Hash)]
 pub struct StmtFunctionDef<'a> {
-    decorator_list: Vec<ComparableDecorator<'a>>,
-    name: &'a str,
-    type_params: Option<ComparableTypeParams<'a>>,
-    parameters: ComparableParameters<'a>,
-    returns: Option<ComparableExpr<'a>>,
-    body: Vec<ComparableStmt<'a>>,
-}
-
-#[derive(Debug, PartialEq, Eq, Hash)]
-pub struct StmtAsyncFunctionDef<'a> {
+    is_async: bool,
     decorator_list: Vec<ComparableDecorator<'a>>,
     name: &'a str,
     type_params: Option<ComparableTypeParams<'a>>,
@@ -1084,14 +1075,7 @@ pub struct StmtAnnAssign<'a> {
 
 #[derive(Debug, PartialEq, Eq, Hash)]
 pub struct StmtFor<'a> {
-    target: ComparableExpr<'a>,
-    iter: ComparableExpr<'a>,
-    body: Vec<ComparableStmt<'a>>,
-    orelse: Vec<ComparableStmt<'a>>,
-}
-
-#[derive(Debug, PartialEq, Eq, Hash)]
-pub struct StmtAsyncFor<'a> {
+    is_async: bool,
     target: ComparableExpr<'a>,
     iter: ComparableExpr<'a>,
     body: Vec<ComparableStmt<'a>>,
@@ -1114,12 +1098,7 @@ pub struct StmtIf<'a> {
 
 #[derive(Debug, PartialEq, Eq, Hash)]
 pub struct StmtWith<'a> {
-    items: Vec<ComparableWithItem<'a>>,
-    body: Vec<ComparableStmt<'a>>,
-}
-
-#[derive(Debug, PartialEq, Eq, Hash)]
-pub struct StmtAsyncWith<'a> {
+    is_async: bool,
     items: Vec<ComparableWithItem<'a>>,
     body: Vec<ComparableStmt<'a>>,
 }
@@ -1194,7 +1173,6 @@ pub struct StmtLineMagic<'a> {
 #[derive(Debug, PartialEq, Eq, Hash)]
 pub enum ComparableStmt<'a> {
     FunctionDef(StmtFunctionDef<'a>),
-    AsyncFunctionDef(StmtAsyncFunctionDef<'a>),
     ClassDef(StmtClassDef<'a>),
     Return(StmtReturn<'a>),
     Delete(StmtDelete<'a>),
@@ -1202,11 +1180,9 @@ pub enum ComparableStmt<'a> {
     AugAssign(StmtAugAssign<'a>),
     AnnAssign(StmtAnnAssign<'a>),
     For(StmtFor<'a>),
-    AsyncFor(StmtAsyncFor<'a>),
     While(StmtWhile<'a>),
     If(StmtIf<'a>),
     With(StmtWith<'a>),
-    AsyncWith(StmtAsyncWith<'a>),
     Match(StmtMatch<'a>),
     Raise(StmtRaise<'a>),
     Try(StmtTry<'a>),
@@ -1228,6 +1204,7 @@ impl<'a> From<&'a ast::Stmt> for ComparableStmt<'a> {
     fn from(stmt: &'a ast::Stmt) -> Self {
         match stmt {
             ast::Stmt::FunctionDef(ast::StmtFunctionDef {
+                is_async,
                 name,
                 parameters,
                 body,
@@ -1236,22 +1213,7 @@ impl<'a> From<&'a ast::Stmt> for ComparableStmt<'a> {
                 type_params,
                 range: _,
             }) => Self::FunctionDef(StmtFunctionDef {
-                name: name.as_str(),
-                parameters: parameters.into(),
-                body: body.iter().map(Into::into).collect(),
-                decorator_list: decorator_list.iter().map(Into::into).collect(),
-                returns: returns.as_ref().map(Into::into),
-                type_params: type_params.as_ref().map(Into::into),
-            }),
-            ast::Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef {
-                name,
-                parameters,
-                body,
-                decorator_list,
-                returns,
-                type_params,
-                range: _,
-            }) => Self::AsyncFunctionDef(StmtAsyncFunctionDef {
+                is_async: *is_async,
                 name: name.as_str(),
                 parameters: parameters.into(),
                 body: body.iter().map(Into::into).collect(),
@@ -1320,24 +1282,14 @@ impl<'a> From<&'a ast::Stmt> for ComparableStmt<'a> {
                 simple: *simple,
             }),
             ast::Stmt::For(ast::StmtFor {
+                is_async,
                 target,
                 iter,
                 body,
                 orelse,
                 range: _,
             }) => Self::For(StmtFor {
-                target: target.into(),
-                iter: iter.into(),
-                body: body.iter().map(Into::into).collect(),
-                orelse: orelse.iter().map(Into::into).collect(),
-            }),
-            ast::Stmt::AsyncFor(ast::StmtAsyncFor {
-                target,
-                iter,
-                body,
-                orelse,
-                range: _,
-            }) => Self::AsyncFor(StmtAsyncFor {
+                is_async: *is_async,
                 target: target.into(),
                 iter: iter.into(),
                 body: body.iter().map(Into::into).collect(),
@@ -1364,18 +1316,12 @@ impl<'a> From<&'a ast::Stmt> for ComparableStmt<'a> {
                 elif_else_clauses: elif_else_clauses.iter().map(Into::into).collect(),
             }),
             ast::Stmt::With(ast::StmtWith {
+                is_async,
                 items,
                 body,
                 range: _,
             }) => Self::With(StmtWith {
-                items: items.iter().map(Into::into).collect(),
-                body: body.iter().map(Into::into).collect(),
-            }),
-            ast::Stmt::AsyncWith(ast::StmtAsyncWith {
-                items,
-                body,
-                range: _,
-            }) => Self::AsyncWith(StmtAsyncWith {
+                is_async: *is_async,
                 items: items.iter().map(Into::into).collect(),
                 body: body.iter().map(Into::into).collect(),
             }),
diff --git a/crates/ruff_python_ast/src/function.rs b/crates/ruff_python_ast/src/function.rs
deleted file mode 100644
index 96737bcf86..0000000000
--- a/crates/ruff_python_ast/src/function.rs
+++ /dev/null
@@ -1,134 +0,0 @@
-use crate::node::AnyNodeRef;
-use crate::{
-    Decorator, Expr, Identifier, Parameters, Ranged, StmtAsyncFunctionDef, StmtFunctionDef, Suite,
-    TypeParams,
-};
-use ruff_text_size::TextRange;
-
-/// Enum that represents any python function definition.
-#[derive(Copy, Clone, PartialEq, Debug)]
-pub enum AnyFunctionDefinition<'a> {
-    FunctionDefinition(&'a StmtFunctionDef),
-    AsyncFunctionDefinition(&'a StmtAsyncFunctionDef),
-}
-
-impl<'a> AnyFunctionDefinition<'a> {
-    pub const fn cast_ref(reference: AnyNodeRef<'a>) -> Option<Self> {
-        match reference {
-            AnyNodeRef::StmtAsyncFunctionDef(definition) => {
-                Some(Self::AsyncFunctionDefinition(definition))
-            }
-            AnyNodeRef::StmtFunctionDef(definition) => Some(Self::FunctionDefinition(definition)),
-            _ => None,
-        }
-    }
-
-    /// Returns `Some` if this is a [`StmtFunctionDef`] and `None` otherwise.
-    pub const fn as_function_definition(self) -> Option<&'a StmtFunctionDef> {
-        if let Self::FunctionDefinition(definition) = self {
-            Some(definition)
-        } else {
-            None
-        }
-    }
-
-    /// Returns `Some` if this is a [`StmtAsyncFunctionDef`] and `None` otherwise.
-    pub const fn as_async_function_definition(self) -> Option<&'a StmtAsyncFunctionDef> {
-        if let Self::AsyncFunctionDefinition(definition) = self {
-            Some(definition)
-        } else {
-            None
-        }
-    }
-
-    /// Returns the function's name
-    pub const fn name(self) -> &'a Identifier {
-        match self {
-            Self::FunctionDefinition(definition) => &definition.name,
-            Self::AsyncFunctionDefinition(definition) => &definition.name,
-        }
-    }
-
-    /// Returns the function arguments (parameters).
-    pub fn arguments(self) -> &'a Parameters {
-        match self {
-            Self::FunctionDefinition(definition) => definition.parameters.as_ref(),
-            Self::AsyncFunctionDefinition(definition) => definition.parameters.as_ref(),
-        }
-    }
-
-    /// Returns the function's body
-    pub const fn body(self) -> &'a Suite {
-        match self {
-            Self::FunctionDefinition(definition) => &definition.body,
-            Self::AsyncFunctionDefinition(definition) => &definition.body,
-        }
-    }
-
-    /// Returns the decorators attributing the function.
-    pub fn decorators(self) -> &'a [Decorator] {
-        match self {
-            Self::FunctionDefinition(definition) => &definition.decorator_list,
-            Self::AsyncFunctionDefinition(definition) => &definition.decorator_list,
-        }
-    }
-
-    pub fn returns(self) -> Option<&'a Expr> {
-        match self {
-            Self::FunctionDefinition(definition) => definition.returns.as_deref(),
-            Self::AsyncFunctionDefinition(definition) => definition.returns.as_deref(),
-        }
-    }
-
-    pub fn type_params(self) -> Option<&'a TypeParams> {
-        match self {
-            Self::FunctionDefinition(definition) => definition.type_params.as_ref(),
-            Self::AsyncFunctionDefinition(definition) => definition.type_params.as_ref(),
-        }
-    }
-
-    /// Returns `true` if this is [`Self::AsyncFunctionDefinition`]
-    pub const fn is_async(self) -> bool {
-        matches!(self, Self::AsyncFunctionDefinition(_))
-    }
-}
-
-impl Ranged for AnyFunctionDefinition<'_> {
-    fn range(&self) -> TextRange {
-        match self {
-            AnyFunctionDefinition::FunctionDefinition(definition) => definition.range(),
-            AnyFunctionDefinition::AsyncFunctionDefinition(definition) => definition.range(),
-        }
-    }
-}
-
-impl<'a> From<&'a StmtFunctionDef> for AnyFunctionDefinition<'a> {
-    fn from(value: &'a StmtFunctionDef) -> Self {
-        Self::FunctionDefinition(value)
-    }
-}
-
-impl<'a> From<&'a StmtAsyncFunctionDef> for AnyFunctionDefinition<'a> {
-    fn from(value: &'a StmtAsyncFunctionDef) -> Self {
-        Self::AsyncFunctionDefinition(value)
-    }
-}
-
-impl<'a> From<AnyFunctionDefinition<'a>> for AnyNodeRef<'a> {
-    fn from(value: AnyFunctionDefinition<'a>) -> Self {
-        match value {
-            AnyFunctionDefinition::FunctionDefinition(function_def) => {
-                AnyNodeRef::StmtFunctionDef(function_def)
-            }
-            AnyFunctionDefinition::AsyncFunctionDefinition(async_def) => {
-                AnyNodeRef::StmtAsyncFunctionDef(async_def)
-            }
-        }
-    }
-}
-
-impl<'a> From<&'a AnyFunctionDefinition<'a>> for AnyNodeRef<'a> {
-    fn from(value: &'a AnyFunctionDefinition<'a>) -> Self {
-        (*value).into()
-    }
-}
diff --git a/crates/ruff_python_ast/src/helpers.rs b/crates/ruff_python_ast/src/helpers.rs
index d29a68b167..a7994a3b49 100644
--- a/crates/ruff_python_ast/src/helpers.rs
+++ b/crates/ruff_python_ast/src/helpers.rs
@@ -18,14 +18,11 @@ pub const fn is_compound_statement(stmt: &Stmt) -> bool {
     matches!(
         stmt,
         Stmt::FunctionDef(_)
-            | Stmt::AsyncFunctionDef(_)
             | Stmt::ClassDef(_)
             | Stmt::While(_)
             | Stmt::For(_)
-            | Stmt::AsyncFor(_)
             | Stmt::Match(_)
             | Stmt::With(_)
-            | Stmt::AsyncWith(_)
             | Stmt::If(_)
             | Stmt::Try(_)
             | Stmt::TryStar(_)
@@ -321,14 +318,6 @@ where
             decorator_list,
             returns,
             ..
-        })
-        | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef {
-            parameters,
-            type_params,
-            body,
-            decorator_list,
-            returns,
-            ..
         }) => {
             parameters
                 .posonlyargs
@@ -439,13 +428,6 @@ where
             body,
             orelse,
             ..
-        })
-        | Stmt::AsyncFor(ast::StmtAsyncFor {
-            target,
-            iter,
-            body,
-            orelse,
-            ..
         }) => {
             any_over_expr(target, func)
                 || any_over_expr(iter, func)
@@ -474,8 +456,7 @@ where
                         || any_over_body(&clause.body, func)
                 })
         }
-        Stmt::With(ast::StmtWith { items, body, .. })
-        | Stmt::AsyncWith(ast::StmtAsyncWith { items, body, .. }) => {
+        Stmt::With(ast::StmtWith { items, body, .. }) => {
             items.iter().any(|with_item| {
                 any_over_expr(&with_item.context_expr, func)
                     || with_item
@@ -912,7 +893,7 @@ where
 {
     fn visit_stmt(&mut self, stmt: &'b Stmt) {
         match stmt {
-            Stmt::FunctionDef(_) | Stmt::AsyncFunctionDef(_) | Stmt::ClassDef(_) => {
+            Stmt::FunctionDef(_) | Stmt::ClassDef(_) => {
                 // Don't recurse.
             }
             Stmt::Return(stmt) => self.returns.push(stmt),
@@ -941,11 +922,7 @@ where
                 self.raises
                     .push((stmt.range(), exc.as_deref(), cause.as_deref()));
             }
-            Stmt::ClassDef(_)
-            | Stmt::FunctionDef(_)
-            | Stmt::AsyncFunctionDef(_)
-            | Stmt::Try(_)
-            | Stmt::TryStar(_) => {}
+            Stmt::ClassDef(_) | Stmt::FunctionDef(_) | Stmt::Try(_) | Stmt::TryStar(_) => {}
             Stmt::If(ast::StmtIf {
                 body,
                 elif_else_clauses,
@@ -958,9 +935,7 @@ where
             }
             Stmt::While(ast::StmtWhile { body, .. })
             | Stmt::With(ast::StmtWith { body, .. })
-            | Stmt::AsyncWith(ast::StmtAsyncWith { body, .. })
-            | Stmt::For(ast::StmtFor { body, .. })
-            | Stmt::AsyncFor(ast::StmtAsyncFor { body, .. }) => {
+            | Stmt::For(ast::StmtFor { body, .. }) => {
                 walk_body(self, body);
             }
             Stmt::Match(ast::StmtMatch { cases, .. }) => {
diff --git a/crates/ruff_python_ast/src/identifier.rs b/crates/ruff_python_ast/src/identifier.rs
index d5d18a9641..38a014ef14 100644
--- a/crates/ruff_python_ast/src/identifier.rs
+++ b/crates/ruff_python_ast/src/identifier.rs
@@ -31,8 +31,7 @@ impl Identifier for Stmt {
     fn identifier(&self) -> TextRange {
         match self {
             Stmt::ClassDef(ast::StmtClassDef { name, .. })
-            | Stmt::FunctionDef(ast::StmtFunctionDef { name, .. })
-            | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef { name, .. }) => name.range(),
+            | Stmt::FunctionDef(ast::StmtFunctionDef { name, .. }) => name.range(),
             _ => self.range(),
         }
     }
@@ -85,10 +84,9 @@ pub fn except(handler: &ExceptHandler, source: &str) -> TextRange {
         .expect("Failed to find `except` token in `ExceptHandler`")
 }
 
-/// Return the [`TextRange`] of the `else` token in a `For`, `AsyncFor`, or `While` statement.
+/// Return the [`TextRange`] of the `else` token in a `For` or `While` statement.
 pub fn else_(stmt: &Stmt, source: &str) -> Option<TextRange> {
     let (Stmt::For(ast::StmtFor { body, orelse, .. })
-    | Stmt::AsyncFor(ast::StmtAsyncFor { body, orelse, .. })
     | Stmt::While(ast::StmtWhile { body, orelse, .. })) = stmt
     else {
         return None;
diff --git a/crates/ruff_python_ast/src/lib.rs b/crates/ruff_python_ast/src/lib.rs
index a7489fb7a1..25ebbc0329 100644
--- a/crates/ruff_python_ast/src/lib.rs
+++ b/crates/ruff_python_ast/src/lib.rs
@@ -6,7 +6,6 @@ pub mod call_path;
 pub mod cast;
 pub mod comparable;
 pub mod docstrings;
-pub mod function;
 pub mod hashable;
 pub mod helpers;
 pub mod identifier;
diff --git a/crates/ruff_python_ast/src/node.rs b/crates/ruff_python_ast/src/node.rs
index 6f7f2c911f..ec2c6075c0 100644
--- a/crates/ruff_python_ast/src/node.rs
+++ b/crates/ruff_python_ast/src/node.rs
@@ -24,7 +24,6 @@ pub enum AnyNode {
     ModModule(ast::ModModule),
     ModExpression(ast::ModExpression),
     StmtFunctionDef(ast::StmtFunctionDef),
-    StmtAsyncFunctionDef(ast::StmtAsyncFunctionDef),
     StmtClassDef(ast::StmtClassDef),
     StmtReturn(ast::StmtReturn),
     StmtDelete(ast::StmtDelete),
@@ -33,11 +32,9 @@ pub enum AnyNode {
     StmtAugAssign(ast::StmtAugAssign),
     StmtAnnAssign(ast::StmtAnnAssign),
     StmtFor(ast::StmtFor),
-    StmtAsyncFor(ast::StmtAsyncFor),
     StmtWhile(ast::StmtWhile),
     StmtIf(ast::StmtIf),
     StmtWith(ast::StmtWith),
-    StmtAsyncWith(ast::StmtAsyncWith),
     StmtMatch(ast::StmtMatch),
     StmtRaise(ast::StmtRaise),
     StmtTry(ast::StmtTry),
@@ -110,7 +107,6 @@ impl AnyNode {
     pub fn statement(self) -> Option<Stmt> {
         match self {
             AnyNode::StmtFunctionDef(node) => Some(Stmt::FunctionDef(node)),
-            AnyNode::StmtAsyncFunctionDef(node) => Some(Stmt::AsyncFunctionDef(node)),
             AnyNode::StmtClassDef(node) => Some(Stmt::ClassDef(node)),
             AnyNode::StmtReturn(node) => Some(Stmt::Return(node)),
             AnyNode::StmtDelete(node) => Some(Stmt::Delete(node)),
@@ -119,11 +115,9 @@ impl AnyNode {
             AnyNode::StmtAugAssign(node) => Some(Stmt::AugAssign(node)),
             AnyNode::StmtAnnAssign(node) => Some(Stmt::AnnAssign(node)),
             AnyNode::StmtFor(node) => Some(Stmt::For(node)),
-            AnyNode::StmtAsyncFor(node) => Some(Stmt::AsyncFor(node)),
             AnyNode::StmtWhile(node) => Some(Stmt::While(node)),
             AnyNode::StmtIf(node) => Some(Stmt::If(node)),
             AnyNode::StmtWith(node) => Some(Stmt::With(node)),
-            AnyNode::StmtAsyncWith(node) => Some(Stmt::AsyncWith(node)),
             AnyNode::StmtMatch(node) => Some(Stmt::Match(node)),
             AnyNode::StmtRaise(node) => Some(Stmt::Raise(node)),
             AnyNode::StmtTry(node) => Some(Stmt::Try(node)),
@@ -230,7 +224,6 @@ impl AnyNode {
             AnyNode::ModModule(_)
             | AnyNode::ModExpression(_)
             | AnyNode::StmtFunctionDef(_)
-            | AnyNode::StmtAsyncFunctionDef(_)
             | AnyNode::StmtClassDef(_)
             | AnyNode::StmtReturn(_)
             | AnyNode::StmtDelete(_)
@@ -239,11 +232,9 @@ impl AnyNode {
             | AnyNode::StmtAugAssign(_)
             | AnyNode::StmtAnnAssign(_)
             | AnyNode::StmtFor(_)
-            | AnyNode::StmtAsyncFor(_)
             | AnyNode::StmtWhile(_)
             | AnyNode::StmtIf(_)
             | AnyNode::StmtWith(_)
-            | AnyNode::StmtAsyncWith(_)
             | AnyNode::StmtMatch(_)
             | AnyNode::StmtRaise(_)
             | AnyNode::StmtTry(_)
@@ -291,7 +282,6 @@ impl AnyNode {
             AnyNode::ModExpression(node) => Some(Mod::Expression(node)),
 
             AnyNode::StmtFunctionDef(_)
-            | AnyNode::StmtAsyncFunctionDef(_)
             | AnyNode::StmtClassDef(_)
             | AnyNode::StmtReturn(_)
             | AnyNode::StmtDelete(_)
@@ -300,11 +290,9 @@ impl AnyNode {
             | AnyNode::StmtAugAssign(_)
             | AnyNode::StmtAnnAssign(_)
             | AnyNode::StmtFor(_)
-            | AnyNode::StmtAsyncFor(_)
             | AnyNode::StmtWhile(_)
             | AnyNode::StmtIf(_)
             | AnyNode::StmtWith(_)
-            | AnyNode::StmtAsyncWith(_)
             | AnyNode::StmtMatch(_)
             | AnyNode::StmtRaise(_)
             | AnyNode::StmtTry(_)
@@ -388,7 +376,6 @@ impl AnyNode {
             AnyNode::ModModule(_)
             | AnyNode::ModExpression(_)
             | AnyNode::StmtFunctionDef(_)
-            | AnyNode::StmtAsyncFunctionDef(_)
             | AnyNode::StmtClassDef(_)
             | AnyNode::StmtReturn(_)
             | AnyNode::StmtDelete(_)
@@ -397,11 +384,9 @@ impl AnyNode {
             | AnyNode::StmtAugAssign(_)
             | AnyNode::StmtAnnAssign(_)
             | AnyNode::StmtFor(_)
-            | AnyNode::StmtAsyncFor(_)
             | AnyNode::StmtWhile(_)
             | AnyNode::StmtIf(_)
             | AnyNode::StmtWith(_)
-            | AnyNode::StmtAsyncWith(_)
             | AnyNode::StmtMatch(_)
             | AnyNode::StmtRaise(_)
             | AnyNode::StmtTry(_)
@@ -470,7 +455,6 @@ impl AnyNode {
             AnyNode::ModModule(_)
             | AnyNode::ModExpression(_)
             | AnyNode::StmtFunctionDef(_)
-            | AnyNode::StmtAsyncFunctionDef(_)
             | AnyNode::StmtClassDef(_)
             | AnyNode::StmtReturn(_)
             | AnyNode::StmtDelete(_)
@@ -479,11 +463,9 @@ impl AnyNode {
             | AnyNode::StmtAugAssign(_)
             | AnyNode::StmtAnnAssign(_)
             | AnyNode::StmtFor(_)
-            | AnyNode::StmtAsyncFor(_)
             | AnyNode::StmtWhile(_)
             | AnyNode::StmtIf(_)
             | AnyNode::StmtWith(_)
-            | AnyNode::StmtAsyncWith(_)
             | AnyNode::StmtMatch(_)
             | AnyNode::StmtRaise(_)
             | AnyNode::StmtTry(_)
@@ -577,7 +559,6 @@ impl AnyNode {
             Self::ModModule(node) => AnyNodeRef::ModModule(node),
             Self::ModExpression(node) => AnyNodeRef::ModExpression(node),
             Self::StmtFunctionDef(node) => AnyNodeRef::StmtFunctionDef(node),
-            Self::StmtAsyncFunctionDef(node) => AnyNodeRef::StmtAsyncFunctionDef(node),
             Self::StmtClassDef(node) => AnyNodeRef::StmtClassDef(node),
             Self::StmtReturn(node) => AnyNodeRef::StmtReturn(node),
             Self::StmtDelete(node) => AnyNodeRef::StmtDelete(node),
@@ -586,11 +567,9 @@ impl AnyNode {
             Self::StmtAugAssign(node) => AnyNodeRef::StmtAugAssign(node),
             Self::StmtAnnAssign(node) => AnyNodeRef::StmtAnnAssign(node),
             Self::StmtFor(node) => AnyNodeRef::StmtFor(node),
-            Self::StmtAsyncFor(node) => AnyNodeRef::StmtAsyncFor(node),
             Self::StmtWhile(node) => AnyNodeRef::StmtWhile(node),
             Self::StmtIf(node) => AnyNodeRef::StmtIf(node),
             Self::StmtWith(node) => AnyNodeRef::StmtWith(node),
-            Self::StmtAsyncWith(node) => AnyNodeRef::StmtAsyncWith(node),
             Self::StmtMatch(node) => AnyNodeRef::StmtMatch(node),
             Self::StmtRaise(node) => AnyNodeRef::StmtRaise(node),
             Self::StmtTry(node) => AnyNodeRef::StmtTry(node),
@@ -750,34 +729,6 @@ impl AstNode for ast::StmtFunctionDef {
         AnyNode::from(self)
     }
 }
-impl AstNode for ast::StmtAsyncFunctionDef {
-    fn cast(kind: AnyNode) -> Option<Self>
-    where
-        Self: Sized,
-    {
-        if let AnyNode::StmtAsyncFunctionDef(node) = kind {
-            Some(node)
-        } else {
-            None
-        }
-    }
-
-    fn cast_ref(kind: AnyNodeRef) -> Option<&Self> {
-        if let AnyNodeRef::StmtAsyncFunctionDef(node) = kind {
-            Some(node)
-        } else {
-            None
-        }
-    }
-
-    fn as_any_node_ref(&self) -> AnyNodeRef {
-        AnyNodeRef::from(self)
-    }
-
-    fn into_any_node(self) -> AnyNode {
-        AnyNode::from(self)
-    }
-}
 impl AstNode for ast::StmtClassDef {
     fn cast(kind: AnyNode) -> Option<Self>
     where
@@ -1002,34 +953,6 @@ impl AstNode for ast::StmtFor {
         AnyNode::from(self)
     }
 }
-impl AstNode for ast::StmtAsyncFor {
-    fn cast(kind: AnyNode) -> Option<Self>
-    where
-        Self: Sized,
-    {
-        if let AnyNode::StmtAsyncFor(node) = kind {
-            Some(node)
-        } else {
-            None
-        }
-    }
-
-    fn cast_ref(kind: AnyNodeRef) -> Option<&Self> {
-        if let AnyNodeRef::StmtAsyncFor(node) = kind {
-            Some(node)
-        } else {
-            None
-        }
-    }
-
-    fn as_any_node_ref(&self) -> AnyNodeRef {
-        AnyNodeRef::from(self)
-    }
-
-    fn into_any_node(self) -> AnyNode {
-        AnyNode::from(self)
-    }
-}
 impl AstNode for ast::StmtWhile {
     fn cast(kind: AnyNode) -> Option<Self>
     where
@@ -1142,34 +1065,6 @@ impl AstNode for ast::StmtWith {
         AnyNode::from(self)
     }
 }
-impl AstNode for ast::StmtAsyncWith {
-    fn cast(kind: AnyNode) -> Option<Self>
-    where
-        Self: Sized,
-    {
-        if let AnyNode::StmtAsyncWith(node) = kind {
-            Some(node)
-        } else {
-            None
-        }
-    }
-
-    fn cast_ref(kind: AnyNodeRef) -> Option<&Self> {
-        if let AnyNodeRef::StmtAsyncWith(node) = kind {
-            Some(node)
-        } else {
-            None
-        }
-    }
-
-    fn as_any_node_ref(&self) -> AnyNodeRef {
-        AnyNodeRef::from(self)
-    }
-
-    fn into_any_node(self) -> AnyNode {
-        AnyNode::from(self)
-    }
-}
 impl AstNode for ast::StmtMatch {
     fn cast(kind: AnyNode) -> Option<Self>
     where
@@ -2996,7 +2891,6 @@ impl From<Stmt> for AnyNode {
     fn from(stmt: Stmt) -> Self {
         match stmt {
             Stmt::FunctionDef(node) => AnyNode::StmtFunctionDef(node),
-            Stmt::AsyncFunctionDef(node) => AnyNode::StmtAsyncFunctionDef(node),
             Stmt::ClassDef(node) => AnyNode::StmtClassDef(node),
             Stmt::Return(node) => AnyNode::StmtReturn(node),
             Stmt::Delete(node) => AnyNode::StmtDelete(node),
@@ -3005,11 +2899,9 @@ impl From<Stmt> for AnyNode {
             Stmt::AugAssign(node) => AnyNode::StmtAugAssign(node),
             Stmt::AnnAssign(node) => AnyNode::StmtAnnAssign(node),
             Stmt::For(node) => AnyNode::StmtFor(node),
-            Stmt::AsyncFor(node) => AnyNode::StmtAsyncFor(node),
             Stmt::While(node) => AnyNode::StmtWhile(node),
             Stmt::If(node) => AnyNode::StmtIf(node),
             Stmt::With(node) => AnyNode::StmtWith(node),
-            Stmt::AsyncWith(node) => AnyNode::StmtAsyncWith(node),
             Stmt::Match(node) => AnyNode::StmtMatch(node),
             Stmt::Raise(node) => AnyNode::StmtRaise(node),
             Stmt::Try(node) => AnyNode::StmtTry(node),
@@ -3113,12 +3005,6 @@ impl From<ast::StmtFunctionDef> for AnyNode {
     }
 }
 
-impl From<ast::StmtAsyncFunctionDef> for AnyNode {
-    fn from(node: ast::StmtAsyncFunctionDef) -> Self {
-        AnyNode::StmtAsyncFunctionDef(node)
-    }
-}
-
 impl From<ast::StmtClassDef> for AnyNode {
     fn from(node: ast::StmtClassDef) -> Self {
         AnyNode::StmtClassDef(node)
@@ -3167,12 +3053,6 @@ impl From<ast::StmtFor> for AnyNode {
     }
 }
 
-impl From<ast::StmtAsyncFor> for AnyNode {
-    fn from(node: ast::StmtAsyncFor) -> Self {
-        AnyNode::StmtAsyncFor(node)
-    }
-}
-
 impl From<ast::StmtWhile> for AnyNode {
     fn from(node: ast::StmtWhile) -> Self {
         AnyNode::StmtWhile(node)
@@ -3197,12 +3077,6 @@ impl From<ast::StmtWith> for AnyNode {
     }
 }
 
-impl From<ast::StmtAsyncWith> for AnyNode {
-    fn from(node: ast::StmtAsyncWith) -> Self {
-        AnyNode::StmtAsyncWith(node)
-    }
-}
-
 impl From<ast::StmtMatch> for AnyNode {
     fn from(node: ast::StmtMatch) -> Self {
         AnyNode::StmtMatch(node)
@@ -3588,7 +3462,6 @@ impl Ranged for AnyNode {
             AnyNode::ModModule(node) => node.range(),
             AnyNode::ModExpression(node) => node.range(),
             AnyNode::StmtFunctionDef(node) => node.range(),
-            AnyNode::StmtAsyncFunctionDef(node) => node.range(),
             AnyNode::StmtClassDef(node) => node.range(),
             AnyNode::StmtReturn(node) => node.range(),
             AnyNode::StmtDelete(node) => node.range(),
@@ -3597,11 +3470,9 @@ impl Ranged for AnyNode {
             AnyNode::StmtAugAssign(node) => node.range(),
             AnyNode::StmtAnnAssign(node) => node.range(),
             AnyNode::StmtFor(node) => node.range(),
-            AnyNode::StmtAsyncFor(node) => node.range(),
             AnyNode::StmtWhile(node) => node.range(),
             AnyNode::StmtIf(node) => node.range(),
             AnyNode::StmtWith(node) => node.range(),
-            AnyNode::StmtAsyncWith(node) => node.range(),
             AnyNode::StmtMatch(node) => node.range(),
             AnyNode::StmtRaise(node) => node.range(),
             AnyNode::StmtTry(node) => node.range(),
@@ -3677,7 +3548,6 @@ pub enum AnyNodeRef<'a> {
     ModModule(&'a ast::ModModule),
     ModExpression(&'a ast::ModExpression),
     StmtFunctionDef(&'a ast::StmtFunctionDef),
-    StmtAsyncFunctionDef(&'a ast::StmtAsyncFunctionDef),
     StmtClassDef(&'a ast::StmtClassDef),
     StmtReturn(&'a ast::StmtReturn),
     StmtDelete(&'a ast::StmtDelete),
@@ -3686,11 +3556,9 @@ pub enum AnyNodeRef<'a> {
     StmtAugAssign(&'a ast::StmtAugAssign),
     StmtAnnAssign(&'a ast::StmtAnnAssign),
     StmtFor(&'a ast::StmtFor),
-    StmtAsyncFor(&'a ast::StmtAsyncFor),
     StmtWhile(&'a ast::StmtWhile),
     StmtIf(&'a ast::StmtIf),
     StmtWith(&'a ast::StmtWith),
-    StmtAsyncWith(&'a ast::StmtAsyncWith),
     StmtMatch(&'a ast::StmtMatch),
     StmtRaise(&'a ast::StmtRaise),
     StmtTry(&'a ast::StmtTry),
@@ -3765,7 +3633,6 @@ impl AnyNodeRef<'_> {
             AnyNodeRef::ModModule(node) => NonNull::from(*node).cast(),
             AnyNodeRef::ModExpression(node) => NonNull::from(*node).cast(),
             AnyNodeRef::StmtFunctionDef(node) => NonNull::from(*node).cast(),
-            AnyNodeRef::StmtAsyncFunctionDef(node) => NonNull::from(*node).cast(),
             AnyNodeRef::StmtClassDef(node) => NonNull::from(*node).cast(),
             AnyNodeRef::StmtReturn(node) => NonNull::from(*node).cast(),
             AnyNodeRef::StmtDelete(node) => NonNull::from(*node).cast(),
@@ -3774,11 +3641,9 @@ impl AnyNodeRef<'_> {
             AnyNodeRef::StmtAugAssign(node) => NonNull::from(*node).cast(),
             AnyNodeRef::StmtAnnAssign(node) => NonNull::from(*node).cast(),
             AnyNodeRef::StmtFor(node) => NonNull::from(*node).cast(),
-            AnyNodeRef::StmtAsyncFor(node) => NonNull::from(*node).cast(),
             AnyNodeRef::StmtWhile(node) => NonNull::from(*node).cast(),
             AnyNodeRef::StmtIf(node) => NonNull::from(*node).cast(),
             AnyNodeRef::StmtWith(node) => NonNull::from(*node).cast(),
-            AnyNodeRef::StmtAsyncWith(node) => NonNull::from(*node).cast(),
             AnyNodeRef::StmtMatch(node) => NonNull::from(*node).cast(),
             AnyNodeRef::StmtRaise(node) => NonNull::from(*node).cast(),
             AnyNodeRef::StmtTry(node) => NonNull::from(*node).cast(),
@@ -3859,7 +3724,6 @@ impl AnyNodeRef<'_> {
             AnyNodeRef::ModModule(_) => NodeKind::ModModule,
             AnyNodeRef::ModExpression(_) => NodeKind::ModExpression,
             AnyNodeRef::StmtFunctionDef(_) => NodeKind::StmtFunctionDef,
-            AnyNodeRef::StmtAsyncFunctionDef(_) => NodeKind::StmtAsyncFunctionDef,
             AnyNodeRef::StmtClassDef(_) => NodeKind::StmtClassDef,
             AnyNodeRef::StmtReturn(_) => NodeKind::StmtReturn,
             AnyNodeRef::StmtDelete(_) => NodeKind::StmtDelete,
@@ -3868,11 +3732,9 @@ impl AnyNodeRef<'_> {
             AnyNodeRef::StmtAugAssign(_) => NodeKind::StmtAugAssign,
             AnyNodeRef::StmtAnnAssign(_) => NodeKind::StmtAnnAssign,
             AnyNodeRef::StmtFor(_) => NodeKind::StmtFor,
-            AnyNodeRef::StmtAsyncFor(_) => NodeKind::StmtAsyncFor,
             AnyNodeRef::StmtWhile(_) => NodeKind::StmtWhile,
             AnyNodeRef::StmtIf(_) => NodeKind::StmtIf,
             AnyNodeRef::StmtWith(_) => NodeKind::StmtWith,
-            AnyNodeRef::StmtAsyncWith(_) => NodeKind::StmtAsyncWith,
             AnyNodeRef::StmtMatch(_) => NodeKind::StmtMatch,
             AnyNodeRef::StmtRaise(_) => NodeKind::StmtRaise,
             AnyNodeRef::StmtTry(_) => NodeKind::StmtTry,
@@ -3945,7 +3807,6 @@ impl AnyNodeRef<'_> {
     pub const fn is_statement(self) -> bool {
         match self {
             AnyNodeRef::StmtFunctionDef(_)
-            | AnyNodeRef::StmtAsyncFunctionDef(_)
             | AnyNodeRef::StmtClassDef(_)
             | AnyNodeRef::StmtReturn(_)
             | AnyNodeRef::StmtDelete(_)
@@ -3954,11 +3815,9 @@ impl AnyNodeRef<'_> {
             | AnyNodeRef::StmtAugAssign(_)
             | AnyNodeRef::StmtAnnAssign(_)
             | AnyNodeRef::StmtFor(_)
-            | AnyNodeRef::StmtAsyncFor(_)
             | AnyNodeRef::StmtWhile(_)
             | AnyNodeRef::StmtIf(_)
             | AnyNodeRef::StmtWith(_)
-            | AnyNodeRef::StmtAsyncWith(_)
             | AnyNodeRef::StmtMatch(_)
             | AnyNodeRef::StmtRaise(_)
             | AnyNodeRef::StmtTry(_)
@@ -4065,7 +3924,6 @@ impl AnyNodeRef<'_> {
             AnyNodeRef::ModModule(_)
             | AnyNodeRef::ModExpression(_)
             | AnyNodeRef::StmtFunctionDef(_)
-            | AnyNodeRef::StmtAsyncFunctionDef(_)
             | AnyNodeRef::StmtClassDef(_)
             | AnyNodeRef::StmtReturn(_)
             | AnyNodeRef::StmtDelete(_)
@@ -4074,11 +3932,9 @@ impl AnyNodeRef<'_> {
             | AnyNodeRef::StmtAugAssign(_)
             | AnyNodeRef::StmtAnnAssign(_)
             | AnyNodeRef::StmtFor(_)
-            | AnyNodeRef::StmtAsyncFor(_)
             | AnyNodeRef::StmtWhile(_)
             | AnyNodeRef::StmtIf(_)
             | AnyNodeRef::StmtWith(_)
-            | AnyNodeRef::StmtAsyncWith(_)
             | AnyNodeRef::StmtMatch(_)
             | AnyNodeRef::StmtRaise(_)
             | AnyNodeRef::StmtTry(_)
@@ -4125,7 +3981,6 @@ impl AnyNodeRef<'_> {
             AnyNodeRef::ModModule(_) | AnyNodeRef::ModExpression(_) => true,
 
             AnyNodeRef::StmtFunctionDef(_)
-            | AnyNodeRef::StmtAsyncFunctionDef(_)
             | AnyNodeRef::StmtClassDef(_)
             | AnyNodeRef::StmtReturn(_)
             | AnyNodeRef::StmtDelete(_)
@@ -4134,11 +3989,9 @@ impl AnyNodeRef<'_> {
             | AnyNodeRef::StmtAugAssign(_)
             | AnyNodeRef::StmtAnnAssign(_)
             | AnyNodeRef::StmtFor(_)
-            | AnyNodeRef::StmtAsyncFor(_)
             | AnyNodeRef::StmtWhile(_)
             | AnyNodeRef::StmtIf(_)
             | AnyNodeRef::StmtWith(_)
-            | AnyNodeRef::StmtAsyncWith(_)
             | AnyNodeRef::StmtMatch(_)
             | AnyNodeRef::StmtRaise(_)
             | AnyNodeRef::StmtTry(_)
@@ -4222,7 +4075,6 @@ impl AnyNodeRef<'_> {
             AnyNodeRef::ModModule(_)
             | AnyNodeRef::ModExpression(_)
             | AnyNodeRef::StmtFunctionDef(_)
-            | AnyNodeRef::StmtAsyncFunctionDef(_)
             | AnyNodeRef::StmtClassDef(_)
             | AnyNodeRef::StmtReturn(_)
             | AnyNodeRef::StmtDelete(_)
@@ -4231,11 +4083,9 @@ impl AnyNodeRef<'_> {
             | AnyNodeRef::StmtAugAssign(_)
             | AnyNodeRef::StmtAnnAssign(_)
             | AnyNodeRef::StmtFor(_)
-            | AnyNodeRef::StmtAsyncFor(_)
             | AnyNodeRef::StmtWhile(_)
             | AnyNodeRef::StmtIf(_)
             | AnyNodeRef::StmtWith(_)
-            | AnyNodeRef::StmtAsyncWith(_)
             | AnyNodeRef::StmtMatch(_)
             | AnyNodeRef::StmtRaise(_)
             | AnyNodeRef::StmtTry(_)
@@ -4304,7 +4154,6 @@ impl AnyNodeRef<'_> {
             AnyNodeRef::ModModule(_)
             | AnyNodeRef::ModExpression(_)
             | AnyNodeRef::StmtFunctionDef(_)
-            | AnyNodeRef::StmtAsyncFunctionDef(_)
             | AnyNodeRef::StmtClassDef(_)
             | AnyNodeRef::StmtReturn(_)
             | AnyNodeRef::StmtDelete(_)
@@ -4313,11 +4162,9 @@ impl AnyNodeRef<'_> {
             | AnyNodeRef::StmtAugAssign(_)
             | AnyNodeRef::StmtAnnAssign(_)
             | AnyNodeRef::StmtFor(_)
-            | AnyNodeRef::StmtAsyncFor(_)
             | AnyNodeRef::StmtWhile(_)
             | AnyNodeRef::StmtIf(_)
             | AnyNodeRef::StmtWith(_)
-            | AnyNodeRef::StmtAsyncWith(_)
             | AnyNodeRef::StmtMatch(_)
             | AnyNodeRef::StmtRaise(_)
             | AnyNodeRef::StmtTry(_)
@@ -4391,13 +4238,10 @@ impl AnyNodeRef<'_> {
             self,
             AnyNodeRef::StmtIf(_)
                 | AnyNodeRef::StmtFor(_)
-                | AnyNodeRef::StmtAsyncFor(_)
                 | AnyNodeRef::StmtWhile(_)
                 | AnyNodeRef::StmtWith(_)
-                | AnyNodeRef::StmtAsyncWith(_)
                 | AnyNodeRef::StmtMatch(_)
                 | AnyNodeRef::StmtFunctionDef(_)
-                | AnyNodeRef::StmtAsyncFunctionDef(_)
                 | AnyNodeRef::StmtClassDef(_)
                 | AnyNodeRef::StmtTry(_)
                 | AnyNodeRef::StmtTryStar(_)
@@ -4435,12 +4279,6 @@ impl<'a> From<&'a ast::StmtFunctionDef> for AnyNodeRef<'a> {
     }
 }
 
-impl<'a> From<&'a ast::StmtAsyncFunctionDef> for AnyNodeRef<'a> {
-    fn from(node: &'a ast::StmtAsyncFunctionDef) -> Self {
-        AnyNodeRef::StmtAsyncFunctionDef(node)
-    }
-}
-
 impl<'a> From<&'a ast::StmtClassDef> for AnyNodeRef<'a> {
     fn from(node: &'a ast::StmtClassDef) -> Self {
         AnyNodeRef::StmtClassDef(node)
@@ -4489,12 +4327,6 @@ impl<'a> From<&'a ast::StmtFor> for AnyNodeRef<'a> {
     }
 }
 
-impl<'a> From<&'a ast::StmtAsyncFor> for AnyNodeRef<'a> {
-    fn from(node: &'a ast::StmtAsyncFor) -> Self {
-        AnyNodeRef::StmtAsyncFor(node)
-    }
-}
-
 impl<'a> From<&'a ast::StmtWhile> for AnyNodeRef<'a> {
     fn from(node: &'a ast::StmtWhile) -> Self {
         AnyNodeRef::StmtWhile(node)
@@ -4519,12 +4351,6 @@ impl<'a> From<&'a ast::StmtWith> for AnyNodeRef<'a> {
     }
 }
 
-impl<'a> From<&'a ast::StmtAsyncWith> for AnyNodeRef<'a> {
-    fn from(node: &'a ast::StmtAsyncWith) -> Self {
-        AnyNodeRef::StmtAsyncWith(node)
-    }
-}
-
 impl<'a> From<&'a ast::StmtMatch> for AnyNodeRef<'a> {
     fn from(node: &'a ast::StmtMatch) -> Self {
         AnyNodeRef::StmtMatch(node)
@@ -4864,7 +4690,6 @@ impl<'a> From<&'a Stmt> for AnyNodeRef<'a> {
     fn from(stmt: &'a Stmt) -> Self {
         match stmt {
             Stmt::FunctionDef(node) => AnyNodeRef::StmtFunctionDef(node),
-            Stmt::AsyncFunctionDef(node) => AnyNodeRef::StmtAsyncFunctionDef(node),
             Stmt::ClassDef(node) => AnyNodeRef::StmtClassDef(node),
             Stmt::Return(node) => AnyNodeRef::StmtReturn(node),
             Stmt::Delete(node) => AnyNodeRef::StmtDelete(node),
@@ -4873,11 +4698,9 @@ impl<'a> From<&'a Stmt> for AnyNodeRef<'a> {
             Stmt::AugAssign(node) => AnyNodeRef::StmtAugAssign(node),
             Stmt::AnnAssign(node) => AnyNodeRef::StmtAnnAssign(node),
             Stmt::For(node) => AnyNodeRef::StmtFor(node),
-            Stmt::AsyncFor(node) => AnyNodeRef::StmtAsyncFor(node),
             Stmt::While(node) => AnyNodeRef::StmtWhile(node),
             Stmt::If(node) => AnyNodeRef::StmtIf(node),
             Stmt::With(node) => AnyNodeRef::StmtWith(node),
-            Stmt::AsyncWith(node) => AnyNodeRef::StmtAsyncWith(node),
             Stmt::Match(node) => AnyNodeRef::StmtMatch(node),
             Stmt::Raise(node) => AnyNodeRef::StmtRaise(node),
             Stmt::Try(node) => AnyNodeRef::StmtTry(node),
@@ -5027,7 +4850,6 @@ impl Ranged for AnyNodeRef<'_> {
             AnyNodeRef::ModModule(node) => node.range(),
             AnyNodeRef::ModExpression(node) => node.range(),
             AnyNodeRef::StmtFunctionDef(node) => node.range(),
-            AnyNodeRef::StmtAsyncFunctionDef(node) => node.range(),
             AnyNodeRef::StmtClassDef(node) => node.range(),
             AnyNodeRef::StmtReturn(node) => node.range(),
             AnyNodeRef::StmtDelete(node) => node.range(),
@@ -5036,11 +4858,9 @@ impl Ranged for AnyNodeRef<'_> {
             AnyNodeRef::StmtAugAssign(node) => node.range(),
             AnyNodeRef::StmtAnnAssign(node) => node.range(),
             AnyNodeRef::StmtFor(node) => node.range(),
-            AnyNodeRef::StmtAsyncFor(node) => node.range(),
             AnyNodeRef::StmtWhile(node) => node.range(),
             AnyNodeRef::StmtIf(node) => node.range(),
             AnyNodeRef::StmtWith(node) => node.range(),
-            AnyNodeRef::StmtAsyncWith(node) => node.range(),
             AnyNodeRef::StmtMatch(node) => node.range(),
             AnyNodeRef::StmtRaise(node) => node.range(),
             AnyNodeRef::StmtTry(node) => node.range(),
@@ -5118,7 +4938,6 @@ pub enum NodeKind {
     ModExpression,
     ModFunctionType,
     StmtFunctionDef,
-    StmtAsyncFunctionDef,
     StmtClassDef,
     StmtReturn,
     StmtDelete,
@@ -5127,11 +4946,9 @@ pub enum NodeKind {
     StmtAugAssign,
     StmtAnnAssign,
     StmtFor,
-    StmtAsyncFor,
     StmtWhile,
     StmtIf,
     StmtWith,
-    StmtAsyncWith,
     StmtMatch,
     StmtRaise,
     StmtTry,
diff --git a/crates/ruff_python_ast/src/nodes.rs b/crates/ruff_python_ast/src/nodes.rs
index d536ce8ca6..5e5239872a 100644
--- a/crates/ruff_python_ast/src/nodes.rs
+++ b/crates/ruff_python_ast/src/nodes.rs
@@ -45,8 +45,6 @@ impl From<ModExpression> for Mod {
 pub enum Stmt {
     #[is(name = "function_def_stmt")]
     FunctionDef(StmtFunctionDef),
-    #[is(name = "async_function_def_stmt")]
-    AsyncFunctionDef(StmtAsyncFunctionDef),
     #[is(name = "class_def_stmt")]
     ClassDef(StmtClassDef),
     #[is(name = "return_stmt")]
@@ -63,16 +61,12 @@ pub enum Stmt {
     TypeAlias(StmtTypeAlias),
     #[is(name = "for_stmt")]
     For(StmtFor),
-    #[is(name = "async_for_stmt")]
-    AsyncFor(StmtAsyncFor),
     #[is(name = "while_stmt")]
     While(StmtWhile),
     #[is(name = "if_stmt")]
     If(StmtIf),
     #[is(name = "with_stmt")]
     With(StmtWith),
-    #[is(name = "async_with_stmt")]
-    AsyncWith(StmtAsyncWith),
     #[is(name = "match_stmt")]
     Match(StmtMatch),
     #[is(name = "raise_stmt")]
@@ -118,10 +112,15 @@ impl From<StmtLineMagic> for Stmt {
     }
 }
 
-/// See also [FunctionDef](https://docs.python.org/3/library/ast.html#ast.FunctionDef)
+/// See also [FunctionDef](https://docs.python.org/3/library/ast.html#ast.FunctionDef) and
+/// [AsyncFunctionDef](https://docs.python.org/3/library/ast.html#ast.AsyncFunctionDef).
+///
+/// This type differs from the original Python AST, as it collapses the
+/// synchronous and asynchronous variants into a single type.
 #[derive(Clone, Debug, PartialEq)]
 pub struct StmtFunctionDef {
     pub range: TextRange,
+    pub is_async: bool,
     pub decorator_list: Vec<Decorator>,
     pub name: Identifier,
     pub type_params: Option<TypeParams>,
@@ -136,24 +135,6 @@ impl From<StmtFunctionDef> for Stmt {
     }
 }
 
-/// See also [AsyncFunctionDef](https://docs.python.org/3/library/ast.html#ast.AsyncFunctionDef)
-#[derive(Clone, Debug, PartialEq)]
-pub struct StmtAsyncFunctionDef {
-    pub range: TextRange,
-    pub decorator_list: Vec<Decorator>,
-    pub name: Identifier,
-    pub type_params: Option<TypeParams>,
-    pub parameters: Box<Parameters>,
-    pub returns: Option<Box<Expr>>,
-    pub body: Vec<Stmt>,
-}
-
-impl From<StmtAsyncFunctionDef> for Stmt {
-    fn from(payload: StmtAsyncFunctionDef) -> Self {
-        Stmt::AsyncFunctionDef(payload)
-    }
-}
-
 /// See also [ClassDef](https://docs.python.org/3/library/ast.html#ast.ClassDef)
 #[derive(Clone, Debug, PartialEq)]
 pub struct StmtClassDef {
@@ -275,10 +256,15 @@ impl From<StmtAnnAssign> for Stmt {
     }
 }
 
-/// See also [For](https://docs.python.org/3/library/ast.html#ast.For)
+/// See also [For](https://docs.python.org/3/library/ast.html#ast.For) and
+/// [AsyncFor](https://docs.python.org/3/library/ast.html#ast.AsyncFor).
+///
+/// This type differs from the original Python AST, as it collapses the
+/// synchronous and asynchronous variants into a single type.
 #[derive(Clone, Debug, PartialEq)]
 pub struct StmtFor {
     pub range: TextRange,
+    pub is_async: bool,
     pub target: Box<Expr>,
     pub iter: Box<Expr>,
     pub body: Vec<Stmt>,
@@ -291,23 +277,8 @@ impl From<StmtFor> for Stmt {
     }
 }
 
-/// See also [AsyncFor](https://docs.python.org/3/library/ast.html#ast.AsyncFor)
-#[derive(Clone, Debug, PartialEq)]
-pub struct StmtAsyncFor {
-    pub range: TextRange,
-    pub target: Box<Expr>,
-    pub iter: Box<Expr>,
-    pub body: Vec<Stmt>,
-    pub orelse: Vec<Stmt>,
-}
-
-impl From<StmtAsyncFor> for Stmt {
-    fn from(payload: StmtAsyncFor) -> Self {
-        Stmt::AsyncFor(payload)
-    }
-}
-
-/// See also [While](https://docs.python.org/3/library/ast.html#ast.While)
+/// See also [While](https://docs.python.org/3/library/ast.html#ast.While) and
+/// [AsyncWhile](https://docs.python.org/3/library/ast.html#ast.AsyncWhile).
 #[derive(Clone, Debug, PartialEq)]
 pub struct StmtWhile {
     pub range: TextRange,
@@ -344,10 +315,15 @@ pub struct ElifElseClause {
     pub body: Vec<Stmt>,
 }
 
-/// See also [With](https://docs.python.org/3/library/ast.html#ast.With)
+/// See also [With](https://docs.python.org/3/library/ast.html#ast.With) and
+/// [AsyncWith](https://docs.python.org/3/library/ast.html#ast.AsyncWith).
+///
+/// This type differs from the original Python AST, as it collapses the
+/// synchronous and asynchronous variants into a single type.
 #[derive(Clone, Debug, PartialEq)]
 pub struct StmtWith {
     pub range: TextRange,
+    pub is_async: bool,
     pub items: Vec<WithItem>,
     pub body: Vec<Stmt>,
 }
@@ -358,20 +334,6 @@ impl From<StmtWith> for Stmt {
     }
 }
 
-/// See also [AsyncWith](https://docs.python.org/3/library/ast.html#ast.AsyncWith)
-#[derive(Clone, Debug, PartialEq)]
-pub struct StmtAsyncWith {
-    pub range: TextRange,
-    pub items: Vec<WithItem>,
-    pub body: Vec<Stmt>,
-}
-
-impl From<StmtAsyncWith> for Stmt {
-    fn from(payload: StmtAsyncWith) -> Self {
-        Stmt::AsyncWith(payload)
-    }
-}
-
 /// See also [Match](https://docs.python.org/3/library/ast.html#ast.Match)
 #[derive(Clone, Debug, PartialEq)]
 pub struct StmtMatch {
@@ -2599,11 +2561,6 @@ impl Ranged for crate::nodes::StmtFunctionDef {
         self.range
     }
 }
-impl Ranged for crate::nodes::StmtAsyncFunctionDef {
-    fn range(&self) -> TextRange {
-        self.range
-    }
-}
 impl Ranged for crate::nodes::StmtClassDef {
     fn range(&self) -> TextRange {
         self.range
@@ -2644,11 +2601,6 @@ impl Ranged for crate::nodes::StmtFor {
         self.range
     }
 }
-impl Ranged for crate::nodes::StmtAsyncFor {
-    fn range(&self) -> TextRange {
-        self.range
-    }
-}
 impl Ranged for crate::nodes::StmtWhile {
     fn range(&self) -> TextRange {
         self.range
@@ -2669,11 +2621,6 @@ impl Ranged for crate::nodes::StmtWith {
         self.range
     }
 }
-impl Ranged for crate::nodes::StmtAsyncWith {
-    fn range(&self) -> TextRange {
-        self.range
-    }
-}
 impl Ranged for crate::nodes::StmtMatch {
     fn range(&self) -> TextRange {
         self.range
@@ -2748,7 +2695,6 @@ impl Ranged for crate::Stmt {
     fn range(&self) -> TextRange {
         match self {
             Self::FunctionDef(node) => node.range(),
-            Self::AsyncFunctionDef(node) => node.range(),
             Self::ClassDef(node) => node.range(),
             Self::Return(node) => node.range(),
             Self::Delete(node) => node.range(),
@@ -2757,11 +2703,9 @@ impl Ranged for crate::Stmt {
             Self::AugAssign(node) => node.range(),
             Self::AnnAssign(node) => node.range(),
             Self::For(node) => node.range(),
-            Self::AsyncFor(node) => node.range(),
             Self::While(node) => node.range(),
             Self::If(node) => node.range(),
             Self::With(node) => node.range(),
-            Self::AsyncWith(node) => node.range(),
             Self::Match(node) => node.range(),
             Self::Raise(node) => node.range(),
             Self::Try(node) => node.range(),
@@ -3110,8 +3054,7 @@ mod size_assertions {
     use static_assertions::assert_eq_size;
 
     assert_eq_size!(Stmt, [u8; 144]);
-    assert_eq_size!(StmtFunctionDef, [u8; 136]);
-    assert_eq_size!(StmtAsyncFunctionDef, [u8; 136]);
+    assert_eq_size!(StmtFunctionDef, [u8; 144]);
     assert_eq_size!(StmtClassDef, [u8; 104]);
     assert_eq_size!(StmtTry, [u8; 104]);
     assert_eq_size!(Expr, [u8; 80]);
diff --git a/crates/ruff_python_ast/src/statement_visitor.rs b/crates/ruff_python_ast/src/statement_visitor.rs
index c061e0beb8..57f458d8fb 100644
--- a/crates/ruff_python_ast/src/statement_visitor.rs
+++ b/crates/ruff_python_ast/src/statement_visitor.rs
@@ -32,9 +32,6 @@ pub fn walk_stmt<'a, V: StatementVisitor<'a> + ?Sized>(visitor: &mut V, stmt: &'
         Stmt::FunctionDef(ast::StmtFunctionDef { body, .. }) => {
             visitor.visit_body(body);
         }
-        Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef { body, .. }) => {
-            visitor.visit_body(body);
-        }
         Stmt::For(ast::StmtFor { body, orelse, .. }) => {
             visitor.visit_body(body);
             visitor.visit_body(orelse);
@@ -42,10 +39,6 @@ pub fn walk_stmt<'a, V: StatementVisitor<'a> + ?Sized>(visitor: &mut V, stmt: &'
         Stmt::ClassDef(ast::StmtClassDef { body, .. }) => {
             visitor.visit_body(body);
         }
-        Stmt::AsyncFor(ast::StmtAsyncFor { body, orelse, .. }) => {
-            visitor.visit_body(body);
-            visitor.visit_body(orelse);
-        }
         Stmt::While(ast::StmtWhile { body, orelse, .. }) => {
             visitor.visit_body(body);
             visitor.visit_body(orelse);
@@ -63,9 +56,6 @@ pub fn walk_stmt<'a, V: StatementVisitor<'a> + ?Sized>(visitor: &mut V, stmt: &'
         Stmt::With(ast::StmtWith { body, .. }) => {
             visitor.visit_body(body);
         }
-        Stmt::AsyncWith(ast::StmtAsyncWith { body, .. }) => {
-            visitor.visit_body(body);
-        }
         Stmt::Match(ast::StmtMatch { cases, .. }) => {
             for match_case in cases {
                 visitor.visit_match_case(match_case);
diff --git a/crates/ruff_python_ast/src/traversal.rs b/crates/ruff_python_ast/src/traversal.rs
index 95f88d13c9..6a732aa890 100644
--- a/crates/ruff_python_ast/src/traversal.rs
+++ b/crates/ruff_python_ast/src/traversal.rs
@@ -5,7 +5,6 @@ use crate::{self as ast, ExceptHandler, Stmt, Suite};
 pub fn suite<'a>(stmt: &'a Stmt, parent: &'a Stmt) -> Option<&'a Suite> {
     match parent {
         Stmt::FunctionDef(ast::StmtFunctionDef { body, .. }) => Some(body),
-        Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef { body, .. }) => Some(body),
         Stmt::ClassDef(ast::StmtClassDef { body, .. }) => Some(body),
         Stmt::For(ast::StmtFor { body, orelse, .. }) => {
             if body.contains(stmt) {
@@ -16,15 +15,6 @@ pub fn suite<'a>(stmt: &'a Stmt, parent: &'a Stmt) -> Option<&'a Suite> {
                 None
             }
         }
-        Stmt::AsyncFor(ast::StmtAsyncFor { body, orelse, .. }) => {
-            if body.contains(stmt) {
-                Some(body)
-            } else if orelse.contains(stmt) {
-                Some(orelse)
-            } else {
-                None
-            }
-        }
         Stmt::While(ast::StmtWhile { body, orelse, .. }) => {
             if body.contains(stmt) {
                 Some(body)
@@ -49,7 +39,6 @@ pub fn suite<'a>(stmt: &'a Stmt, parent: &'a Stmt) -> Option<&'a Suite> {
             }
         }
         Stmt::With(ast::StmtWith { body, .. }) => Some(body),
-        Stmt::AsyncWith(ast::StmtAsyncWith { body, .. }) => Some(body),
         Stmt::Match(ast::StmtMatch { cases, .. }) => cases
             .iter()
             .map(|case| &case.body)
diff --git a/crates/ruff_python_ast/src/visitor.rs b/crates/ruff_python_ast/src/visitor.rs
index b3aac478bb..be2fc8fc6d 100644
--- a/crates/ruff_python_ast/src/visitor.rs
+++ b/crates/ruff_python_ast/src/visitor.rs
@@ -128,26 +128,6 @@ pub fn walk_stmt<'a, V: Visitor<'a> + ?Sized>(visitor: &mut V, stmt: &'a Stmt) {
             }
             visitor.visit_body(body);
         }
-        Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef {
-            parameters,
-            body,
-            decorator_list,
-            returns,
-            type_params,
-            ..
-        }) => {
-            for decorator in decorator_list {
-                visitor.visit_decorator(decorator);
-            }
-            if let Some(type_params) = type_params {
-                visitor.visit_type_params(type_params);
-            }
-            visitor.visit_parameters(parameters);
-            for expr in returns {
-                visitor.visit_annotation(expr);
-            }
-            visitor.visit_body(body);
-        }
         Stmt::ClassDef(ast::StmtClassDef {
             arguments,
             body,
@@ -228,18 +208,6 @@ pub fn walk_stmt<'a, V: Visitor<'a> + ?Sized>(visitor: &mut V, stmt: &'a Stmt) {
             visitor.visit_body(body);
             visitor.visit_body(orelse);
         }
-        Stmt::AsyncFor(ast::StmtAsyncFor {
-            target,
-            iter,
-            body,
-            orelse,
-            ..
-        }) => {
-            visitor.visit_expr(iter);
-            visitor.visit_expr(target);
-            visitor.visit_body(body);
-            visitor.visit_body(orelse);
-        }
         Stmt::While(ast::StmtWhile {
             test,
             body,
@@ -271,12 +239,6 @@ pub fn walk_stmt<'a, V: Visitor<'a> + ?Sized>(visitor: &mut V, stmt: &'a Stmt) {
             }
             visitor.visit_body(body);
         }
-        Stmt::AsyncWith(ast::StmtAsyncWith { items, body, .. }) => {
-            for with_item in items {
-                visitor.visit_with_item(with_item);
-            }
-            visitor.visit_body(body);
-        }
         Stmt::Match(ast::StmtMatch {
             subject,
             cases,
diff --git a/crates/ruff_python_ast/src/visitor/preorder.rs b/crates/ruff_python_ast/src/visitor/preorder.rs
index 84a9e0535a..90ae53db61 100644
--- a/crates/ruff_python_ast/src/visitor/preorder.rs
+++ b/crates/ruff_python_ast/src/visitor/preorder.rs
@@ -145,14 +145,6 @@ where
             returns,
             type_params,
             ..
-        })
-        | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef {
-            parameters,
-            body,
-            decorator_list,
-            returns,
-            type_params,
-            ..
         }) => {
             for decorator in decorator_list {
                 visitor.visit_decorator(decorator);
@@ -261,13 +253,6 @@ where
             body,
             orelse,
             ..
-        })
-        | Stmt::AsyncFor(ast::StmtAsyncFor {
-            target,
-            iter,
-            body,
-            orelse,
-            ..
         }) => {
             visitor.visit_expr(target);
             visitor.visit_expr(iter);
@@ -302,11 +287,7 @@ where
         Stmt::With(ast::StmtWith {
             items,
             body,
-            range: _,
-        })
-        | Stmt::AsyncWith(ast::StmtAsyncWith {
-            items,
-            body,
+            is_async: _,
             range: _,
         }) => {
             for with_item in items {
diff --git a/crates/ruff_python_codegen/src/generator.rs b/crates/ruff_python_codegen/src/generator.rs
index b502abad65..162f75736d 100644
--- a/crates/ruff_python_codegen/src/generator.rs
+++ b/crates/ruff_python_codegen/src/generator.rs
@@ -23,7 +23,6 @@ mod precedence {
     pub(crate) const YIELD_FROM: u8 = 7;
     pub(crate) const IF: u8 = 9;
     pub(crate) const FOR: u8 = 9;
-    pub(crate) const ASYNC_FOR: u8 = 9;
     pub(crate) const WHILE: u8 = 9;
     pub(crate) const RETURN: u8 = 11;
     pub(crate) const SLICE: u8 = 13;
@@ -204,6 +203,7 @@ impl<'a> Generator<'a> {
 
         match ast {
             Stmt::FunctionDef(ast::StmtFunctionDef {
+                is_async,
                 name,
                 parameters,
                 body,
@@ -220,6 +220,9 @@ impl<'a> Generator<'a> {
                     });
                 }
                 statement!({
+                    if *is_async {
+                        self.p("async ");
+                    }
                     self.p("def ");
                     self.p_id(name);
                     if let Some(type_params) = type_params {
@@ -239,42 +242,6 @@ impl<'a> Generator<'a> {
                     self.newlines(2);
                 }
             }
-            Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef {
-                name,
-                parameters,
-                body,
-                returns,
-                decorator_list,
-                type_params,
-                ..
-            }) => {
-                self.newlines(if self.indent_depth == 0 { 2 } else { 1 });
-                for decorator in decorator_list {
-                    statement!({
-                        self.p("@");
-                        self.unparse_expr(&decorator.expression, precedence::MAX);
-                    });
-                }
-                statement!({
-                    self.p("async def ");
-                    self.p_id(name);
-                    if let Some(type_params) = type_params {
-                        self.unparse_type_params(type_params);
-                    }
-                    self.p("(");
-                    self.unparse_parameters(parameters);
-                    self.p(")");
-                    if let Some(returns) = returns {
-                        self.p(" -> ");
-                        self.unparse_expr(returns, precedence::MAX);
-                    }
-                    self.p(":");
-                });
-                self.body(body);
-                if self.indent_depth == 0 {
-                    self.newlines(2);
-                }
-            }
             Stmt::ClassDef(ast::StmtClassDef {
                 name,
                 arguments,
@@ -400,6 +367,7 @@ impl<'a> Generator<'a> {
                 });
             }
             Stmt::For(ast::StmtFor {
+                is_async,
                 target,
                 iter,
                 body,
@@ -407,6 +375,9 @@ impl<'a> Generator<'a> {
                 ..
             }) => {
                 statement!({
+                    if *is_async {
+                        self.p("async ");
+                    }
                     self.p("for ");
                     self.unparse_expr(target, precedence::FOR);
                     self.p(" in ");
@@ -421,28 +392,6 @@ impl<'a> Generator<'a> {
                     self.body(orelse);
                 }
             }
-            Stmt::AsyncFor(ast::StmtAsyncFor {
-                target,
-                iter,
-                body,
-                orelse,
-                ..
-            }) => {
-                statement!({
-                    self.p("async for ");
-                    self.unparse_expr(target, precedence::ASYNC_FOR);
-                    self.p(" in ");
-                    self.unparse_expr(iter, precedence::MAX);
-                    self.p(":");
-                });
-                self.body(body);
-                if !orelse.is_empty() {
-                    statement!({
-                        self.p("else:");
-                    });
-                    self.body(orelse);
-                }
-            }
             Stmt::While(ast::StmtWhile {
                 test,
                 body,
@@ -490,21 +439,17 @@ impl<'a> Generator<'a> {
                     self.body(&clause.body);
                 }
             }
-            Stmt::With(ast::StmtWith { items, body, .. }) => {
+            Stmt::With(ast::StmtWith {
+                is_async,
+                items,
+                body,
+                ..
+            }) => {
                 statement!({
-                    self.p("with ");
-                    let mut first = true;
-                    for item in items {
-                        self.p_delim(&mut first, ", ");
-                        self.unparse_with_item(item);
+                    if *is_async {
+                        self.p("async ");
                     }
-                    self.p(":");
-                });
-                self.body(body);
-            }
-            Stmt::AsyncWith(ast::StmtAsyncWith { items, body, .. }) => {
-                statement!({
-                    self.p("async with ");
+                    self.p("with ");
                     let mut first = true;
                     for item in items {
                         self.p_delim(&mut first, ", ");
diff --git a/crates/ruff_python_formatter/src/comments/placement.rs b/crates/ruff_python_formatter/src/comments/placement.rs
index 865c770b19..728ea3e7ca 100644
--- a/crates/ruff_python_formatter/src/comments/placement.rs
+++ b/crates/ruff_python_formatter/src/comments/placement.rs
@@ -67,9 +67,7 @@ pub(super) fn place_comment<'a>(
             handle_module_level_own_line_comment_before_class_or_function_comment(comment, locator)
         }
         AnyNodeRef::WithItem(_) => handle_with_item_comment(comment, locator),
-        AnyNodeRef::StmtFunctionDef(_) | AnyNodeRef::StmtAsyncFunctionDef(_) => {
-            handle_leading_function_with_decorators_comment(comment)
-        }
+        AnyNodeRef::StmtFunctionDef(_) => handle_leading_function_with_decorators_comment(comment),
         AnyNodeRef::StmtClassDef(class_def) => {
             handle_leading_class_with_decorators_comment(comment, class_def)
         }
@@ -178,7 +176,6 @@ fn handle_end_of_line_comment_around_body<'a>(
 fn is_first_statement_in_body(statement: AnyNodeRef, has_body: AnyNodeRef) -> bool {
     match has_body {
         AnyNodeRef::StmtFor(ast::StmtFor { body, orelse, .. })
-        | AnyNodeRef::StmtAsyncFor(ast::StmtAsyncFor { body, orelse, .. })
         | AnyNodeRef::StmtWhile(ast::StmtWhile { body, orelse, .. }) => {
             are_same_optional(statement, body.first())
                 || are_same_optional(statement, orelse.first())
@@ -208,7 +205,6 @@ fn is_first_statement_in_body(statement: AnyNodeRef, has_body: AnyNodeRef) -> bo
             body, ..
         })
         | AnyNodeRef::StmtFunctionDef(ast::StmtFunctionDef { body, .. })
-        | AnyNodeRef::StmtAsyncFunctionDef(ast::StmtAsyncFunctionDef { body, .. })
         | AnyNodeRef::StmtClassDef(ast::StmtClassDef { body, .. }) => {
             are_same_optional(statement, body.first())
         }
@@ -773,9 +769,7 @@ fn handle_module_level_own_line_comment_before_class_or_function_comment<'a>(
     // ... where the following is a function or class statement.
     if !matches!(
         following,
-        AnyNodeRef::StmtAsyncFunctionDef(_)
-            | AnyNodeRef::StmtFunctionDef(_)
-            | AnyNodeRef::StmtClassDef(_)
+        AnyNodeRef::StmtFunctionDef(_) | AnyNodeRef::StmtClassDef(_)
     ) {
         return CommentPlacement::Default(comment);
     }
@@ -1408,10 +1402,8 @@ where
 fn last_child_in_body(node: AnyNodeRef) -> Option<AnyNodeRef> {
     let body = match node {
         AnyNodeRef::StmtFunctionDef(ast::StmtFunctionDef { body, .. })
-        | AnyNodeRef::StmtAsyncFunctionDef(ast::StmtAsyncFunctionDef { body, .. })
         | AnyNodeRef::StmtClassDef(ast::StmtClassDef { body, .. })
         | AnyNodeRef::StmtWith(ast::StmtWith { body, .. })
-        | AnyNodeRef::StmtAsyncWith(ast::StmtAsyncWith { body, .. })
         | AnyNodeRef::MatchCase(MatchCase { body, .. })
         | AnyNodeRef::ExceptHandlerExceptHandler(ast::ExceptHandlerExceptHandler {
             body, ..
@@ -1424,7 +1416,6 @@ fn last_child_in_body(node: AnyNodeRef) -> Option<AnyNodeRef> {
         }) => elif_else_clauses.last().map_or(body, |clause| &clause.body),
 
         AnyNodeRef::StmtFor(ast::StmtFor { body, orelse, .. })
-        | AnyNodeRef::StmtAsyncFor(ast::StmtAsyncFor { body, orelse, .. })
         | AnyNodeRef::StmtWhile(ast::StmtWhile { body, orelse, .. }) => {
             if orelse.is_empty() {
                 body
@@ -1477,7 +1468,6 @@ fn last_child_in_body(node: AnyNodeRef) -> Option<AnyNodeRef> {
 fn is_first_statement_in_alternate_body(statement: AnyNodeRef, has_body: AnyNodeRef) -> bool {
     match has_body {
         AnyNodeRef::StmtFor(ast::StmtFor { orelse, .. })
-        | AnyNodeRef::StmtAsyncFor(ast::StmtAsyncFor { orelse, .. })
         | AnyNodeRef::StmtWhile(ast::StmtWhile { orelse, .. }) => {
             are_same_optional(statement, orelse.first())
         }
diff --git a/crates/ruff_python_formatter/src/expression/expr_named_expr.rs b/crates/ruff_python_formatter/src/expression/expr_named_expr.rs
index 88bf4b2052..e0b1f674b9 100644
--- a/crates/ruff_python_formatter/src/expression/expr_named_expr.rs
+++ b/crates/ruff_python_formatter/src/expression/expr_named_expr.rs
@@ -46,7 +46,6 @@ impl NeedsParentheses for ExprNamedExpr {
             || parent.is_with_item()
             || parent.is_stmt_delete()
             || parent.is_stmt_for()
-            || parent.is_stmt_async_for()
         {
             OptionalParentheses::Always
         } else {
diff --git a/crates/ruff_python_formatter/src/generated.rs b/crates/ruff_python_formatter/src/generated.rs
index 1871e09bd5..5a71b2d6e9 100644
--- a/crates/ruff_python_formatter/src/generated.rs
+++ b/crates/ruff_python_formatter/src/generated.rs
@@ -108,42 +108,6 @@ impl<'ast> IntoFormat<PyFormatContext<'ast>> for ast::StmtFunctionDef {
     }
 }
 
-impl FormatRule<ast::StmtAsyncFunctionDef, PyFormatContext<'_>>
-    for crate::statement::stmt_async_function_def::FormatStmtAsyncFunctionDef
-{
-    #[inline]
-    fn fmt(&self, node: &ast::StmtAsyncFunctionDef, f: &mut PyFormatter) -> FormatResult<()> {
-        FormatNodeRule::<ast::StmtAsyncFunctionDef>::fmt(self, node, f)
-    }
-}
-impl<'ast> AsFormat<PyFormatContext<'ast>> for ast::StmtAsyncFunctionDef {
-    type Format<'a> = FormatRefWithRule<
-        'a,
-        ast::StmtAsyncFunctionDef,
-        crate::statement::stmt_async_function_def::FormatStmtAsyncFunctionDef,
-        PyFormatContext<'ast>,
-    >;
-    fn format(&self) -> Self::Format<'_> {
-        FormatRefWithRule::new(
-            self,
-            crate::statement::stmt_async_function_def::FormatStmtAsyncFunctionDef::default(),
-        )
-    }
-}
-impl<'ast> IntoFormat<PyFormatContext<'ast>> for ast::StmtAsyncFunctionDef {
-    type Format = FormatOwnedWithRule<
-        ast::StmtAsyncFunctionDef,
-        crate::statement::stmt_async_function_def::FormatStmtAsyncFunctionDef,
-        PyFormatContext<'ast>,
-    >;
-    fn into_format(self) -> Self::Format {
-        FormatOwnedWithRule::new(
-            self,
-            crate::statement::stmt_async_function_def::FormatStmtAsyncFunctionDef::default(),
-        )
-    }
-}
-
 impl FormatRule<ast::StmtClassDef, PyFormatContext<'_>>
     for crate::statement::stmt_class_def::FormatStmtClassDef
 {
@@ -424,42 +388,6 @@ impl<'ast> IntoFormat<PyFormatContext<'ast>> for ast::StmtFor {
     }
 }
 
-impl FormatRule<ast::StmtAsyncFor, PyFormatContext<'_>>
-    for crate::statement::stmt_async_for::FormatStmtAsyncFor
-{
-    #[inline]
-    fn fmt(&self, node: &ast::StmtAsyncFor, f: &mut PyFormatter) -> FormatResult<()> {
-        FormatNodeRule::<ast::StmtAsyncFor>::fmt(self, node, f)
-    }
-}
-impl<'ast> AsFormat<PyFormatContext<'ast>> for ast::StmtAsyncFor {
-    type Format<'a> = FormatRefWithRule<
-        'a,
-        ast::StmtAsyncFor,
-        crate::statement::stmt_async_for::FormatStmtAsyncFor,
-        PyFormatContext<'ast>,
-    >;
-    fn format(&self) -> Self::Format<'_> {
-        FormatRefWithRule::new(
-            self,
-            crate::statement::stmt_async_for::FormatStmtAsyncFor::default(),
-        )
-    }
-}
-impl<'ast> IntoFormat<PyFormatContext<'ast>> for ast::StmtAsyncFor {
-    type Format = FormatOwnedWithRule<
-        ast::StmtAsyncFor,
-        crate::statement::stmt_async_for::FormatStmtAsyncFor,
-        PyFormatContext<'ast>,
-    >;
-    fn into_format(self) -> Self::Format {
-        FormatOwnedWithRule::new(
-            self,
-            crate::statement::stmt_async_for::FormatStmtAsyncFor::default(),
-        )
-    }
-}
-
 impl FormatRule<ast::StmtWhile, PyFormatContext<'_>>
     for crate::statement::stmt_while::FormatStmtWhile
 {
@@ -554,42 +482,6 @@ impl<'ast> IntoFormat<PyFormatContext<'ast>> for ast::StmtWith {
     }
 }
 
-impl FormatRule<ast::StmtAsyncWith, PyFormatContext<'_>>
-    for crate::statement::stmt_async_with::FormatStmtAsyncWith
-{
-    #[inline]
-    fn fmt(&self, node: &ast::StmtAsyncWith, f: &mut PyFormatter) -> FormatResult<()> {
-        FormatNodeRule::<ast::StmtAsyncWith>::fmt(self, node, f)
-    }
-}
-impl<'ast> AsFormat<PyFormatContext<'ast>> for ast::StmtAsyncWith {
-    type Format<'a> = FormatRefWithRule<
-        'a,
-        ast::StmtAsyncWith,
-        crate::statement::stmt_async_with::FormatStmtAsyncWith,
-        PyFormatContext<'ast>,
-    >;
-    fn format(&self) -> Self::Format<'_> {
-        FormatRefWithRule::new(
-            self,
-            crate::statement::stmt_async_with::FormatStmtAsyncWith::default(),
-        )
-    }
-}
-impl<'ast> IntoFormat<PyFormatContext<'ast>> for ast::StmtAsyncWith {
-    type Format = FormatOwnedWithRule<
-        ast::StmtAsyncWith,
-        crate::statement::stmt_async_with::FormatStmtAsyncWith,
-        PyFormatContext<'ast>,
-    >;
-    fn into_format(self) -> Self::Format {
-        FormatOwnedWithRule::new(
-            self,
-            crate::statement::stmt_async_with::FormatStmtAsyncWith::default(),
-        )
-    }
-}
-
 impl FormatRule<ast::StmtMatch, PyFormatContext<'_>>
     for crate::statement::stmt_match::FormatStmtMatch
 {
diff --git a/crates/ruff_python_formatter/src/statement/mod.rs b/crates/ruff_python_formatter/src/statement/mod.rs
index 114d771528..1a92f03e39 100644
--- a/crates/ruff_python_formatter/src/statement/mod.rs
+++ b/crates/ruff_python_formatter/src/statement/mod.rs
@@ -5,9 +5,6 @@ use ruff_python_ast::Stmt;
 pub(crate) mod stmt_ann_assign;
 pub(crate) mod stmt_assert;
 pub(crate) mod stmt_assign;
-pub(crate) mod stmt_async_for;
-pub(crate) mod stmt_async_function_def;
-pub(crate) mod stmt_async_with;
 pub(crate) mod stmt_aug_assign;
 pub(crate) mod stmt_break;
 pub(crate) mod stmt_class_def;
@@ -40,7 +37,6 @@ impl FormatRule<Stmt, PyFormatContext<'_>> for FormatStmt {
     fn fmt(&self, item: &Stmt, f: &mut PyFormatter) -> FormatResult<()> {
         match item {
             Stmt::FunctionDef(x) => x.format().fmt(f),
-            Stmt::AsyncFunctionDef(x) => x.format().fmt(f),
             Stmt::ClassDef(x) => x.format().fmt(f),
             Stmt::Return(x) => x.format().fmt(f),
             Stmt::Delete(x) => x.format().fmt(f),
@@ -48,11 +44,9 @@ impl FormatRule<Stmt, PyFormatContext<'_>> for FormatStmt {
             Stmt::AugAssign(x) => x.format().fmt(f),
             Stmt::AnnAssign(x) => x.format().fmt(f),
             Stmt::For(x) => x.format().fmt(f),
-            Stmt::AsyncFor(x) => x.format().fmt(f),
             Stmt::While(x) => x.format().fmt(f),
             Stmt::If(x) => x.format().fmt(f),
             Stmt::With(x) => x.format().fmt(f),
-            Stmt::AsyncWith(x) => x.format().fmt(f),
             Stmt::Match(x) => x.format().fmt(f),
             Stmt::Raise(x) => x.format().fmt(f),
             Stmt::Try(x) => x.format().fmt(f),
diff --git a/crates/ruff_python_formatter/src/statement/stmt_async_for.rs b/crates/ruff_python_formatter/src/statement/stmt_async_for.rs
deleted file mode 100644
index f47b3452e2..0000000000
--- a/crates/ruff_python_formatter/src/statement/stmt_async_for.rs
+++ /dev/null
@@ -1,23 +0,0 @@
-use crate::prelude::*;
-use crate::statement::stmt_for::AnyStatementFor;
-use crate::{FormatNodeRule, PyFormatter};
-use ruff_formatter::FormatResult;
-use ruff_python_ast::StmtAsyncFor;
-
-#[derive(Default)]
-pub struct FormatStmtAsyncFor;
-
-impl FormatNodeRule<StmtAsyncFor> for FormatStmtAsyncFor {
-    fn fmt_fields(&self, item: &StmtAsyncFor, f: &mut PyFormatter) -> FormatResult<()> {
-        AnyStatementFor::from(item).fmt(f)
-    }
-
-    fn fmt_dangling_comments(
-        &self,
-        _node: &StmtAsyncFor,
-        _f: &mut PyFormatter,
-    ) -> FormatResult<()> {
-        // Handled in `fmt_fields`
-        Ok(())
-    }
-}
diff --git a/crates/ruff_python_formatter/src/statement/stmt_async_function_def.rs b/crates/ruff_python_formatter/src/statement/stmt_async_function_def.rs
deleted file mode 100644
index 1ba23722e5..0000000000
--- a/crates/ruff_python_formatter/src/statement/stmt_async_function_def.rs
+++ /dev/null
@@ -1,24 +0,0 @@
-use ruff_python_ast::StmtAsyncFunctionDef;
-
-use ruff_python_ast::function::AnyFunctionDefinition;
-
-use crate::prelude::*;
-use crate::FormatNodeRule;
-
-#[derive(Default)]
-pub struct FormatStmtAsyncFunctionDef;
-
-impl FormatNodeRule<StmtAsyncFunctionDef> for FormatStmtAsyncFunctionDef {
-    fn fmt_fields(&self, item: &StmtAsyncFunctionDef, f: &mut PyFormatter) -> FormatResult<()> {
-        AnyFunctionDefinition::from(item).format().fmt(f)
-    }
-
-    fn fmt_dangling_comments(
-        &self,
-        _node: &StmtAsyncFunctionDef,
-        _f: &mut PyFormatter,
-    ) -> FormatResult<()> {
-        // Handled by `AnyFunctionDef`
-        Ok(())
-    }
-}
diff --git a/crates/ruff_python_formatter/src/statement/stmt_async_with.rs b/crates/ruff_python_formatter/src/statement/stmt_async_with.rs
deleted file mode 100644
index fdd89fdb2f..0000000000
--- a/crates/ruff_python_formatter/src/statement/stmt_async_with.rs
+++ /dev/null
@@ -1,22 +0,0 @@
-use crate::prelude::*;
-use crate::statement::stmt_with::AnyStatementWith;
-use crate::FormatNodeRule;
-use ruff_python_ast::StmtAsyncWith;
-
-#[derive(Default)]
-pub struct FormatStmtAsyncWith;
-
-impl FormatNodeRule<StmtAsyncWith> for FormatStmtAsyncWith {
-    fn fmt_fields(&self, item: &StmtAsyncWith, f: &mut PyFormatter) -> FormatResult<()> {
-        AnyStatementWith::from(item).fmt(f)
-    }
-
-    fn fmt_dangling_comments(
-        &self,
-        _node: &StmtAsyncWith,
-        _f: &mut PyFormatter,
-    ) -> FormatResult<()> {
-        // Handled in `fmt_fields`
-        Ok(())
-    }
-}
diff --git a/crates/ruff_python_formatter/src/statement/stmt_for.rs b/crates/ruff_python_formatter/src/statement/stmt_for.rs
index 957fd563c7..e9cac17d23 100644
--- a/crates/ruff_python_formatter/src/statement/stmt_for.rs
+++ b/crates/ruff_python_formatter/src/statement/stmt_for.rs
@@ -1,13 +1,12 @@
+use ruff_formatter::{format_args, write, Buffer, FormatResult};
+use ruff_python_ast::{Expr, Ranged, Stmt, StmtFor};
+
 use crate::comments::{leading_alternate_branch_comments, trailing_comments};
 use crate::expression::expr_tuple::TupleParentheses;
 use crate::expression::maybe_parenthesize_expression;
 use crate::expression::parentheses::Parenthesize;
 use crate::prelude::*;
 use crate::{FormatNodeRule, PyFormatter};
-use ruff_formatter::{format_args, write, Buffer, FormatResult};
-use ruff_python_ast::node::AnyNodeRef;
-use ruff_python_ast::{Expr, Ranged, Stmt, StmtAsyncFor, StmtFor, Suite};
-use ruff_text_size::TextRange;
 
 #[derive(Debug)]
 struct ExprTupleWithoutParentheses<'a>(&'a Expr);
@@ -27,85 +26,19 @@ impl Format<PyFormatContext<'_>> for ExprTupleWithoutParentheses<'_> {
 #[derive(Default)]
 pub struct FormatStmtFor;
 
-pub(super) enum AnyStatementFor<'a> {
-    For(&'a StmtFor),
-    AsyncFor(&'a StmtAsyncFor),
-}
-
-impl<'a> AnyStatementFor<'a> {
-    const fn is_async(&self) -> bool {
-        matches!(self, AnyStatementFor::AsyncFor(_))
-    }
-
-    fn target(&self) -> &Expr {
-        match self {
-            AnyStatementFor::For(stmt) => &stmt.target,
-            AnyStatementFor::AsyncFor(stmt) => &stmt.target,
-        }
-    }
-
-    #[allow(clippy::iter_not_returning_iterator)]
-    fn iter(&self) -> &Expr {
-        match self {
-            AnyStatementFor::For(stmt) => &stmt.iter,
-            AnyStatementFor::AsyncFor(stmt) => &stmt.iter,
-        }
-    }
-
-    fn body(&self) -> &Suite {
-        match self {
-            AnyStatementFor::For(stmt) => &stmt.body,
-            AnyStatementFor::AsyncFor(stmt) => &stmt.body,
-        }
-    }
-
-    fn orelse(&self) -> &Suite {
-        match self {
-            AnyStatementFor::For(stmt) => &stmt.orelse,
-            AnyStatementFor::AsyncFor(stmt) => &stmt.orelse,
-        }
-    }
-}
-
-impl Ranged for AnyStatementFor<'_> {
-    fn range(&self) -> TextRange {
-        match self {
-            AnyStatementFor::For(stmt) => stmt.range(),
-            AnyStatementFor::AsyncFor(stmt) => stmt.range(),
-        }
-    }
-}
-
-impl<'a> From<&'a StmtFor> for AnyStatementFor<'a> {
-    fn from(value: &'a StmtFor) -> Self {
-        AnyStatementFor::For(value)
-    }
-}
-
-impl<'a> From<&'a StmtAsyncFor> for AnyStatementFor<'a> {
-    fn from(value: &'a StmtAsyncFor) -> Self {
-        AnyStatementFor::AsyncFor(value)
-    }
-}
-
-impl<'a> From<&AnyStatementFor<'a>> for AnyNodeRef<'a> {
-    fn from(value: &AnyStatementFor<'a>) -> Self {
-        match value {
-            AnyStatementFor::For(stmt) => AnyNodeRef::StmtFor(stmt),
-            AnyStatementFor::AsyncFor(stmt) => AnyNodeRef::StmtAsyncFor(stmt),
-        }
-    }
-}
-
-impl Format<PyFormatContext<'_>> for AnyStatementFor<'_> {
-    fn fmt(&self, f: &mut PyFormatter) -> FormatResult<()> {
-        let target = self.target();
-        let iter = self.iter();
-        let body = self.body();
-        let orelse = self.orelse();
+impl FormatNodeRule<StmtFor> for FormatStmtFor {
+    fn fmt_fields(&self, item: &StmtFor, f: &mut PyFormatter) -> FormatResult<()> {
+        let StmtFor {
+            is_async,
+            target,
+            iter,
+            body,
+            orelse,
+            range: _,
+        } = item;
 
         let comments = f.context().comments().clone();
-        let dangling_comments = comments.dangling_comments(self);
+        let dangling_comments = comments.dangling_comments(item);
         let body_start = body.first().map_or(iter.end(), Stmt::start);
         let or_else_comments_start =
             dangling_comments.partition_point(|comment| comment.slice().end() < body_start);
@@ -116,15 +49,14 @@ impl Format<PyFormatContext<'_>> for AnyStatementFor<'_> {
         write!(
             f,
             [
-                self.is_async()
-                    .then_some(format_args![text("async"), space()]),
+                is_async.then_some(format_args![text("async"), space()]),
                 text("for"),
                 space(),
                 ExprTupleWithoutParentheses(target),
                 space(),
                 text("in"),
                 space(),
-                maybe_parenthesize_expression(iter, self, Parenthesize::IfBreaks),
+                maybe_parenthesize_expression(iter, item, Parenthesize::IfBreaks),
                 text(":"),
                 trailing_comments(trailing_condition_comments),
                 block_indent(&body.format())
@@ -153,12 +85,6 @@ impl Format<PyFormatContext<'_>> for AnyStatementFor<'_> {
 
         Ok(())
     }
-}
-
-impl FormatNodeRule<StmtFor> for FormatStmtFor {
-    fn fmt_fields(&self, item: &StmtFor, f: &mut PyFormatter) -> FormatResult<()> {
-        AnyStatementFor::from(item).fmt(f)
-    }
 
     fn fmt_dangling_comments(&self, _node: &StmtFor, _f: &mut PyFormatter) -> FormatResult<()> {
         // Handled in `fmt_fields`
diff --git a/crates/ruff_python_formatter/src/statement/stmt_function_def.rs b/crates/ruff_python_formatter/src/statement/stmt_function_def.rs
index 37100ad626..80a8da56ca 100644
--- a/crates/ruff_python_formatter/src/statement/stmt_function_def.rs
+++ b/crates/ruff_python_formatter/src/statement/stmt_function_def.rs
@@ -1,11 +1,8 @@
+use ruff_formatter::write;
 use ruff_python_ast::{Ranged, StmtFunctionDef};
-
-use ruff_formatter::{write, FormatOwnedWithRule, FormatRefWithRule};
-use ruff_python_ast::function::AnyFunctionDefinition;
 use ruff_python_trivia::lines_after_ignoring_trivia;
 
 use crate::comments::{leading_comments, trailing_comments};
-
 use crate::expression::parentheses::{optional_parentheses, Parentheses};
 use crate::prelude::*;
 use crate::statement::suite::SuiteKind;
@@ -16,24 +13,6 @@ pub struct FormatStmtFunctionDef;
 
 impl FormatNodeRule<StmtFunctionDef> for FormatStmtFunctionDef {
     fn fmt_fields(&self, item: &StmtFunctionDef, f: &mut PyFormatter) -> FormatResult<()> {
-        AnyFunctionDefinition::from(item).format().fmt(f)
-    }
-
-    fn fmt_dangling_comments(
-        &self,
-        _node: &StmtFunctionDef,
-        _f: &mut PyFormatter,
-    ) -> FormatResult<()> {
-        // Handled by `AnyFunctionDef`
-        Ok(())
-    }
-}
-
-#[derive(Default)]
-pub struct FormatAnyFunctionDef;
-
-impl FormatRule<AnyFunctionDefinition<'_>, PyFormatContext<'_>> for FormatAnyFunctionDef {
-    fn fmt(&self, item: &AnyFunctionDefinition<'_>, f: &mut PyFormatter) -> FormatResult<()> {
         let comments = f.context().comments().clone();
 
         let dangling_comments = comments.dangling_comments(item);
@@ -43,9 +22,9 @@ impl FormatRule<AnyFunctionDefinition<'_>, PyFormatContext<'_>> for FormatAnyFun
         let (leading_definition_comments, trailing_definition_comments) =
             dangling_comments.split_at(trailing_definition_comments_start);
 
-        if let Some(last_decorator) = item.decorators().last() {
+        if let Some(last_decorator) = item.decorator_list.last() {
             f.join_with(hard_line_break())
-                .entries(item.decorators().iter().formatted())
+                .entries(item.decorator_list.iter().formatted())
                 .finish()?;
 
             if leading_definition_comments.is_empty() {
@@ -69,21 +48,19 @@ impl FormatRule<AnyFunctionDefinition<'_>, PyFormatContext<'_>> for FormatAnyFun
             }
         }
 
-        if item.is_async() {
+        if item.is_async {
             write!(f, [text("async"), space()])?;
         }
 
-        let name = item.name();
+        write!(f, [text("def"), space(), item.name.format()])?;
 
-        write!(f, [text("def"), space(), name.format()])?;
-
-        if let Some(type_params) = item.type_params() {
+        if let Some(type_params) = item.type_params.as_ref() {
             write!(f, [type_params.format()])?;
         }
 
-        write!(f, [item.arguments().format()])?;
+        write!(f, [item.parameters.format()])?;
 
-        if let Some(return_annotation) = item.returns() {
+        if let Some(return_annotation) = item.returns.as_ref() {
             write!(
                 f,
                 [
@@ -102,33 +79,17 @@ impl FormatRule<AnyFunctionDefinition<'_>, PyFormatContext<'_>> for FormatAnyFun
             [
                 text(":"),
                 trailing_comments(trailing_definition_comments),
-                block_indent(&item.body().format().with_options(SuiteKind::Function))
+                block_indent(&item.body.format().with_options(SuiteKind::Function))
             ]
         )
     }
-}
 
-impl<'def, 'ast> AsFormat<PyFormatContext<'ast>> for AnyFunctionDefinition<'def> {
-    type Format<'a> = FormatRefWithRule<
-        'a,
-        AnyFunctionDefinition<'def>,
-        FormatAnyFunctionDef,
-        PyFormatContext<'ast>,
-    > where Self: 'a;
-
-    fn format(&self) -> Self::Format<'_> {
-        FormatRefWithRule::new(self, FormatAnyFunctionDef)
-    }
-}
-
-impl<'def, 'ast> IntoFormat<PyFormatContext<'ast>> for AnyFunctionDefinition<'def> {
-    type Format = FormatOwnedWithRule<
-        AnyFunctionDefinition<'def>,
-        FormatAnyFunctionDef,
-        PyFormatContext<'ast>,
-    >;
-
-    fn into_format(self) -> Self::Format {
-        FormatOwnedWithRule::new(self, FormatAnyFunctionDef)
+    fn fmt_dangling_comments(
+        &self,
+        _node: &StmtFunctionDef,
+        _f: &mut PyFormatter,
+    ) -> FormatResult<()> {
+        // Handled in `fmt_fields`
+        Ok(())
     }
 }
diff --git a/crates/ruff_python_formatter/src/statement/stmt_with.rs b/crates/ruff_python_formatter/src/statement/stmt_with.rs
index 828d0e3536..b8afb2042d 100644
--- a/crates/ruff_python_formatter/src/statement/stmt_with.rs
+++ b/crates/ruff_python_formatter/src/statement/stmt_with.rs
@@ -1,9 +1,7 @@
-use ruff_python_ast::{Ranged, StmtAsyncWith, StmtWith, Suite, WithItem};
-use ruff_text_size::TextRange;
-
 use ruff_formatter::{format_args, write, FormatError};
-use ruff_python_ast::node::AnyNodeRef;
+use ruff_python_ast::{Ranged, StmtWith};
 use ruff_python_trivia::{SimpleTokenKind, SimpleTokenizer};
+use ruff_text_size::TextRange;
 
 use crate::comments::trailing_comments;
 use crate::expression::parentheses::{
@@ -12,81 +10,29 @@ use crate::expression::parentheses::{
 use crate::prelude::*;
 use crate::FormatNodeRule;
 
-pub(super) enum AnyStatementWith<'a> {
-    With(&'a StmtWith),
-    AsyncWith(&'a StmtAsyncWith),
-}
+#[derive(Default)]
+pub struct FormatStmtWith;
 
-impl<'a> AnyStatementWith<'a> {
-    const fn is_async(&self) -> bool {
-        matches!(self, AnyStatementWith::AsyncWith(_))
-    }
-
-    fn items(&self) -> &[WithItem] {
-        match self {
-            AnyStatementWith::With(with) => with.items.as_slice(),
-            AnyStatementWith::AsyncWith(with) => with.items.as_slice(),
-        }
-    }
-
-    fn body(&self) -> &Suite {
-        match self {
-            AnyStatementWith::With(with) => &with.body,
-            AnyStatementWith::AsyncWith(with) => &with.body,
-        }
-    }
-}
-
-impl Ranged for AnyStatementWith<'_> {
-    fn range(&self) -> TextRange {
-        match self {
-            AnyStatementWith::With(with) => with.range(),
-            AnyStatementWith::AsyncWith(with) => with.range(),
-        }
-    }
-}
-
-impl<'a> From<&'a StmtWith> for AnyStatementWith<'a> {
-    fn from(value: &'a StmtWith) -> Self {
-        AnyStatementWith::With(value)
-    }
-}
-
-impl<'a> From<&'a StmtAsyncWith> for AnyStatementWith<'a> {
-    fn from(value: &'a StmtAsyncWith) -> Self {
-        AnyStatementWith::AsyncWith(value)
-    }
-}
-
-impl<'a> From<&AnyStatementWith<'a>> for AnyNodeRef<'a> {
-    fn from(value: &AnyStatementWith<'a>) -> Self {
-        match value {
-            AnyStatementWith::With(with) => AnyNodeRef::StmtWith(with),
-            AnyStatementWith::AsyncWith(with) => AnyNodeRef::StmtAsyncWith(with),
-        }
-    }
-}
-
-impl Format<PyFormatContext<'_>> for AnyStatementWith<'_> {
-    fn fmt(&self, f: &mut PyFormatter) -> FormatResult<()> {
+impl FormatNodeRule<StmtWith> for FormatStmtWith {
+    fn fmt_fields(&self, item: &StmtWith, f: &mut PyFormatter) -> FormatResult<()> {
         let comments = f.context().comments().clone();
-        let dangling_comments = comments.dangling_comments(self);
+        let dangling_comments = comments.dangling_comments(item);
 
         write!(
             f,
             [
-                self.is_async()
+                item.is_async
                     .then_some(format_args![text("async"), space()]),
                 text("with"),
                 space()
             ]
         )?;
 
-        if are_with_items_parenthesized(self, f.context())? {
+        if are_with_items_parenthesized(item, f.context())? {
             optional_parentheses(&format_with(|f| {
-                let mut joiner = f.join_comma_separated(self.body().first().unwrap().start());
+                let mut joiner = f.join_comma_separated(item.body.first().unwrap().start());
 
-                for item in self.items() {
+                for item in &item.items {
                     joiner.entry_with_line_separator(
                         item,
                         &item.format(),
@@ -98,7 +44,7 @@ impl Format<PyFormatContext<'_>> for AnyStatementWith<'_> {
             .fmt(f)?;
         } else {
             f.join_with(format_args![text(","), space()])
-                .entries(self.items().iter().formatted())
+                .entries(item.items.iter().formatted())
                 .finish()?;
         }
 
@@ -107,18 +53,20 @@ impl Format<PyFormatContext<'_>> for AnyStatementWith<'_> {
             [
                 text(":"),
                 trailing_comments(dangling_comments),
-                block_indent(&self.body().format())
+                block_indent(&item.body.format())
             ]
         )
     }
+
+    fn fmt_dangling_comments(&self, _node: &StmtWith, _f: &mut PyFormatter) -> FormatResult<()> {
+        // Handled in `fmt_fields`
+        Ok(())
+    }
 }
 
-fn are_with_items_parenthesized(
-    with: &AnyStatementWith,
-    context: &PyFormatContext,
-) -> FormatResult<bool> {
+fn are_with_items_parenthesized(with: &StmtWith, context: &PyFormatContext) -> FormatResult<bool> {
     let first_with_item = with
-        .items()
+        .items
         .first()
         .ok_or(FormatError::syntax_error("Expected at least one with item"))?;
     let before_first_with_item = TextRange::new(with.start(), first_with_item.start());
@@ -145,17 +93,3 @@ fn are_with_items_parenthesized(
         None => Ok(false),
     }
 }
-
-#[derive(Default)]
-pub struct FormatStmtWith;
-
-impl FormatNodeRule<StmtWith> for FormatStmtWith {
-    fn fmt_fields(&self, item: &StmtWith, f: &mut PyFormatter) -> FormatResult<()> {
-        AnyStatementWith::from(item).fmt(f)
-    }
-
-    fn fmt_dangling_comments(&self, _node: &StmtWith, _f: &mut PyFormatter) -> FormatResult<()> {
-        // Handled in `fmt_fields`
-        Ok(())
-    }
-}
diff --git a/crates/ruff_python_formatter/src/statement/suite.rs b/crates/ruff_python_formatter/src/statement/suite.rs
index 771ad26036..ad3da3c927 100644
--- a/crates/ruff_python_formatter/src/statement/suite.rs
+++ b/crates/ruff_python_formatter/src/statement/suite.rs
@@ -210,10 +210,7 @@ impl FormatRule<Suite, PyFormatContext<'_>> for FormatSuite {
 
 /// Returns `true` if a [`Stmt`] is a class or function definition.
 const fn is_class_or_function_definition(stmt: &Stmt) -> bool {
-    matches!(
-        stmt,
-        Stmt::FunctionDef(_) | Stmt::AsyncFunctionDef(_) | Stmt::ClassDef(_)
-    )
+    matches!(stmt, Stmt::FunctionDef(_) | Stmt::ClassDef(_))
 }
 
 /// Returns `true` if a [`Stmt`] is an import.
diff --git a/crates/ruff_python_parser/src/python.lalrpop b/crates/ruff_python_parser/src/python.lalrpop
index fb75124ea0..3416ab6c09 100644
--- a/crates/ruff_python_parser/src/python.lalrpop
+++ b/crates/ruff_python_parser/src/python.lalrpop
@@ -858,11 +858,7 @@ ForStatement: ast::Stmt = {
             .end();
         let target = Box::new(set_context(target, ast::ExprContext::Store));
         let iter = Box::new(iter);
-        if is_async.is_some() {
-            ast::Stmt::AsyncFor(ast::StmtAsyncFor { target, iter, body, orelse, range: (location..end_location).into() })
-        } else {
-            ast::Stmt::For(ast::StmtFor { target, iter, body, orelse, range: (location..end_location).into() })
-        }
+        ast::Stmt::For(ast::StmtFor { target, iter, body, orelse, is_async: is_async.is_some(), range: (location..end_location).into() })
     },
 };
 
@@ -975,11 +971,7 @@ ExceptClause: ast::ExceptHandler = {
 WithStatement: ast::Stmt = {
     <location:@L> <is_async:"async"?> "with" <items:WithItems> ":" <body:Suite> => {
         let end_location = body.last().unwrap().end();
-        if is_async.is_some() {
-            ast::StmtAsyncWith { items, body, range: (location..end_location).into() }.into()
-        } else {
-            ast::StmtWith { items, body, range: (location..end_location).into() }.into()
-        }
+        ast::StmtWith { items, body, is_async: is_async.is_some(), range: (location..end_location).into() }.into()
     },
 };
 
@@ -1014,11 +1006,7 @@ FuncDef: ast::Stmt = {
         let args = Box::new(args);
         let returns = r.map(Box::new);
         let end_location = body.last().unwrap().end();
-        if is_async.is_some() {
-            ast::StmtAsyncFunctionDef { name, parameters:args, body, decorator_list, returns, type_params, range: (location..end_location).into() }.into()
-        } else {
-            ast::StmtFunctionDef { name, parameters:args, body, decorator_list, returns, type_params, range: (location..end_location).into() }.into()
-        }
+        ast::StmtFunctionDef { name, parameters:args, body, decorator_list, returns, type_params, is_async: is_async.is_some(), range: (location..end_location).into() }.into()
     },
 };
 
diff --git a/crates/ruff_python_parser/src/python.rs b/crates/ruff_python_parser/src/python.rs
index 8577cb525b..4ca7af8dfe 100644
--- a/crates/ruff_python_parser/src/python.rs
+++ b/crates/ruff_python_parser/src/python.rs
@@ -1,5 +1,5 @@
 // auto-generated: "lalrpop 0.20.0"
-// sha3: f99d8cb29227bfbe1fa07719f655304a9a93fd4715726687ef40c091adbdbad5
+// sha3: d713a7771107f8c20353ce5e890fba004b3c5491f513d28e9348a49cd510c59b
 use num_bigint::BigInt;
 use ruff_text_size::TextSize;
 use ruff_python_ast::{self as ast, Ranged, MagicKind};
@@ -33081,11 +33081,7 @@ fn __action147<
             .end();
         let target = Box::new(set_context(target, ast::ExprContext::Store));
         let iter = Box::new(iter);
-        if is_async.is_some() {
-            ast::Stmt::AsyncFor(ast::StmtAsyncFor { target, iter, body, orelse, range: (location..end_location).into() })
-        } else {
-            ast::Stmt::For(ast::StmtFor { target, iter, body, orelse, range: (location..end_location).into() })
-        }
+        ast::Stmt::For(ast::StmtFor { target, iter, body, orelse, is_async: is_async.is_some(), range: (location..end_location).into() })
     }
 }
 
@@ -33306,11 +33302,7 @@ fn __action155<
 {
     {
         let end_location = body.last().unwrap().end();
-        if is_async.is_some() {
-            ast::StmtAsyncWith { items, body, range: (location..end_location).into() }.into()
-        } else {
-            ast::StmtWith { items, body, range: (location..end_location).into() }.into()
-        }
+        ast::StmtWith { items, body, is_async: is_async.is_some(), range: (location..end_location).into() }.into()
     }
 }
 
@@ -33407,11 +33399,7 @@ fn __action161<
         let args = Box::new(args);
         let returns = r.map(Box::new);
         let end_location = body.last().unwrap().end();
-        if is_async.is_some() {
-            ast::StmtAsyncFunctionDef { name, parameters:args, body, decorator_list, returns, type_params, range: (location..end_location).into() }.into()
-        } else {
-            ast::StmtFunctionDef { name, parameters:args, body, decorator_list, returns, type_params, range: (location..end_location).into() }.into()
-        }
+        ast::StmtFunctionDef { name, parameters:args, body, decorator_list, returns, type_params, is_async: is_async.is_some(), range: (location..end_location).into() }.into()
     }
 }
 
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__context__tests__assign_for.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__context__tests__assign_for.snap
index fb74fe3e48..2d4bf6ba9b 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__context__tests__assign_for.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__context__tests__assign_for.snap
@@ -6,6 +6,7 @@ expression: parse_ast
     For(
         StmtFor {
             range: 0..24,
+            is_async: false,
             target: Name(
                 ExprName {
                     range: 4..5,
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__context__tests__assign_with.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__context__tests__assign_with.snap
index c77adbe5f3..f977b37549 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__context__tests__assign_with.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__context__tests__assign_with.snap
@@ -6,6 +6,7 @@ expression: parse_ast
     With(
         StmtWith {
             range: 0..17,
+            is_async: false,
             items: [
                 WithItem {
                     range: 5..11,
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_kw_only_args.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_kw_only_args.snap
index 4e6cabe7e1..ad7dbadf9a 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_kw_only_args.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_kw_only_args.snap
@@ -7,6 +7,7 @@ Ok(
         FunctionDef(
             StmtFunctionDef {
                 range: 0..23,
+                is_async: false,
                 decorator_list: [],
                 name: Identifier {
                     id: "f",
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_kw_only_args_with_defaults.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_kw_only_args_with_defaults.snap
index 2008962778..33a05a02ec 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_kw_only_args_with_defaults.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_kw_only_args_with_defaults.snap
@@ -7,6 +7,7 @@ Ok(
         FunctionDef(
             StmtFunctionDef {
                 range: 0..29,
+                is_async: false,
                 decorator_list: [],
                 name: Identifier {
                     id: "f",
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_no_args.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_no_args.snap
index 2c5ceaf090..4e2121628d 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_no_args.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_no_args.snap
@@ -7,6 +7,7 @@ Ok(
         FunctionDef(
             StmtFunctionDef {
                 range: 0..13,
+                is_async: false,
                 decorator_list: [],
                 name: Identifier {
                     id: "f",
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_no_args_with_ranges.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_no_args_with_ranges.snap
index 2c5ceaf090..4e2121628d 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_no_args_with_ranges.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_no_args_with_ranges.snap
@@ -7,6 +7,7 @@ Ok(
         FunctionDef(
             StmtFunctionDef {
                 range: 0..13,
+                is_async: false,
                 decorator_list: [],
                 name: Identifier {
                     id: "f",
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args.snap
index 5e32c2421e..cd12db1311 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args.snap
@@ -7,6 +7,7 @@ Ok(
         FunctionDef(
             StmtFunctionDef {
                 range: 0..32,
+                is_async: false,
                 decorator_list: [],
                 name: Identifier {
                     id: "f",
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args_with_defaults.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args_with_defaults.snap
index fe9ac3afcf..4276b8915b 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args_with_defaults.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args_with_defaults.snap
@@ -7,6 +7,7 @@ Ok(
         FunctionDef(
             StmtFunctionDef {
                 range: 0..38,
+                is_async: false,
                 decorator_list: [],
                 name: Identifier {
                     id: "f",
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args_with_defaults_and_varargs.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args_with_defaults_and_varargs.snap
index 8944370563..ba1ece7a57 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args_with_defaults_and_varargs.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args_with_defaults_and_varargs.snap
@@ -7,6 +7,7 @@ Ok(
         FunctionDef(
             StmtFunctionDef {
                 range: 0..42,
+                is_async: false,
                 decorator_list: [],
                 name: Identifier {
                     id: "f",
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args_with_defaults_and_varargs_and_kwargs.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args_with_defaults_and_varargs_and_kwargs.snap
index e5ef63795f..dc2888c7bd 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args_with_defaults_and_varargs_and_kwargs.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_and_kw_only_args_with_defaults_and_varargs_and_kwargs.snap
@@ -7,6 +7,7 @@ Ok(
         FunctionDef(
             StmtFunctionDef {
                 range: 0..52,
+                is_async: false,
                 decorator_list: [],
                 name: Identifier {
                     id: "f",
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_args.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_args.snap
index 8a969a82e6..788b1b7a49 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_args.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_args.snap
@@ -7,6 +7,7 @@ Ok(
         FunctionDef(
             StmtFunctionDef {
                 range: 0..20,
+                is_async: false,
                 decorator_list: [],
                 name: Identifier {
                     id: "f",
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_args_with_defaults.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_args_with_defaults.snap
index 4f369f862b..7c0459ab6c 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_args_with_defaults.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_args_with_defaults.snap
@@ -7,6 +7,7 @@ Ok(
         FunctionDef(
             StmtFunctionDef {
                 range: 0..26,
+                is_async: false,
                 decorator_list: [],
                 name: Identifier {
                     id: "f",
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_args_with_ranges.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_args_with_ranges.snap
index 8a969a82e6..788b1b7a49 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_args_with_ranges.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__function__tests__function_pos_args_with_ranges.snap
@@ -7,6 +7,7 @@ Ok(
         FunctionDef(
             StmtFunctionDef {
                 range: 0..20,
+                is_async: false,
                 decorator_list: [],
                 name: Identifier {
                     id: "f",
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__decorator_ranges.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__decorator_ranges.snap
index b976725751..160699606e 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__decorator_ranges.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__decorator_ranges.snap
@@ -6,6 +6,7 @@ expression: parse_ast
     FunctionDef(
         StmtFunctionDef {
             range: 0..34,
+            is_async: false,
             decorator_list: [
                 Decorator {
                     range: 0..13,
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__jupyter_magic.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__jupyter_magic.snap
index 895867df6e..ba9adb4a07 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__jupyter_magic.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__jupyter_magic.snap
@@ -125,6 +125,7 @@ Module(
             FunctionDef(
                 StmtFunctionDef {
                     range: 566..626,
+                    is_async: false,
                     decorator_list: [],
                     name: Identifier {
                         id: "foo",
@@ -199,6 +200,7 @@ Module(
             For(
                 StmtFor {
                     range: 701..727,
+                    is_async: false,
                     target: Name(
                         ExprName {
                             range: 705..706,
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__parse_class.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__parse_class.snap
index 9ac6469514..601df87ff8 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__parse_class.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__parse_class.snap
@@ -38,6 +38,7 @@ expression: "parse_suite(source, \"<test>\").unwrap()"
                 FunctionDef(
                     StmtFunctionDef {
                         range: 18..44,
+                        is_async: false,
                         decorator_list: [],
                         name: Identifier {
                             id: "__init__",
@@ -78,6 +79,7 @@ expression: "parse_suite(source, \"<test>\").unwrap()"
                 FunctionDef(
                     StmtFunctionDef {
                         range: 46..98,
+                        is_async: false,
                         decorator_list: [],
                         name: Identifier {
                             id: "method_with_default",
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__parse_function_definition.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__parse_function_definition.snap
index 1c03ac6610..cf0f7df886 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__parse_function_definition.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__parse_function_definition.snap
@@ -6,6 +6,7 @@ expression: "parse_suite(source, \"<test>\").unwrap()"
     FunctionDef(
         StmtFunctionDef {
             range: 0..20,
+            is_async: false,
             decorator_list: [],
             name: Identifier {
                 id: "func",
@@ -53,6 +54,7 @@ expression: "parse_suite(source, \"<test>\").unwrap()"
     FunctionDef(
         StmtFunctionDef {
             range: 22..53,
+            is_async: false,
             decorator_list: [],
             name: Identifier {
                 id: "func",
@@ -132,6 +134,7 @@ expression: "parse_suite(source, \"<test>\").unwrap()"
     FunctionDef(
         StmtFunctionDef {
             range: 55..91,
+            is_async: false,
             decorator_list: [],
             name: Identifier {
                 id: "func",
@@ -219,6 +222,7 @@ expression: "parse_suite(source, \"<test>\").unwrap()"
     FunctionDef(
         StmtFunctionDef {
             range: 93..138,
+            is_async: false,
             decorator_list: [],
             name: Identifier {
                 id: "func",
@@ -321,6 +325,7 @@ expression: "parse_suite(source, \"<test>\").unwrap()"
     FunctionDef(
         StmtFunctionDef {
             range: 140..171,
+            is_async: false,
             decorator_list: [],
             name: Identifier {
                 id: "func",
@@ -393,6 +398,7 @@ expression: "parse_suite(source, \"<test>\").unwrap()"
     FunctionDef(
         StmtFunctionDef {
             range: 173..230,
+            is_async: false,
             decorator_list: [],
             name: Identifier {
                 id: "func",
@@ -496,6 +502,7 @@ expression: "parse_suite(source, \"<test>\").unwrap()"
     FunctionDef(
         StmtFunctionDef {
             range: 232..273,
+            is_async: false,
             decorator_list: [],
             name: Identifier {
                 id: "func",
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__variadic_generics.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__variadic_generics.snap
index ec38d5c16b..891e02d914 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__variadic_generics.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__variadic_generics.snap
@@ -6,6 +6,7 @@ expression: parse_ast
     FunctionDef(
         StmtFunctionDef {
             range: 1..49,
+            is_async: false,
             decorator_list: [],
             name: Identifier {
                 id: "args_to_tuple",
diff --git a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__with_statement.snap b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__with_statement.snap
index 668b5381fe..abae0fb4bc 100644
--- a/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__with_statement.snap
+++ b/crates/ruff_python_parser/src/snapshots/ruff_python_parser__parser__tests__with_statement.snap
@@ -1,11 +1,12 @@
 ---
 source: crates/ruff_python_parser/src/parser.rs
-expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
+expression: "parse_suite(source, \"<test>\").unwrap()"
 ---
 [
     With(
         StmtWith {
             range: 0..12,
+            is_async: false,
             items: [
                 WithItem {
                     range: 5..6,
@@ -33,6 +34,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 13..30,
+            is_async: false,
             items: [
                 WithItem {
                     range: 18..24,
@@ -68,6 +70,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 31..46,
+            is_async: false,
             items: [
                 WithItem {
                     range: 36..37,
@@ -108,6 +111,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 47..72,
+            is_async: false,
             items: [
                 WithItem {
                     range: 52..58,
@@ -164,6 +168,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 73..97,
+            is_async: false,
             items: [
                 WithItem {
                     range: 78..91,
@@ -214,6 +219,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 98..127,
+            is_async: false,
             items: [
                 WithItem {
                     range: 103..121,
@@ -272,6 +278,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 128..141,
+            is_async: false,
             items: [
                 WithItem {
                     range: 133..135,
@@ -297,6 +304,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 142..160,
+            is_async: false,
             items: [
                 WithItem {
                     range: 147..154,
@@ -330,6 +338,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 161..175,
+            is_async: false,
             items: [
                 WithItem {
                     range: 167..168,
@@ -357,6 +366,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 176..195,
+            is_async: false,
             items: [
                 WithItem {
                     range: 181..189,
@@ -392,6 +402,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 196..211,
+            is_async: false,
             items: [
                 WithItem {
                     range: 202..203,
@@ -419,6 +430,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 212..232,
+            is_async: false,
             items: [
                 WithItem {
                     range: 217..226,
@@ -462,6 +474,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 233..250,
+            is_async: false,
             items: [
                 WithItem {
                     range: 239..243,
@@ -502,6 +515,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 251..273,
+            is_async: false,
             items: [
                 WithItem {
                     range: 256..267,
@@ -554,6 +568,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 274..290,
+            is_async: false,
             items: [
                 WithItem {
                     range: 279..284,
@@ -593,6 +608,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 291..312,
+            is_async: false,
             items: [
                 WithItem {
                     range: 296..306,
@@ -640,6 +656,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 313..331,
+            is_async: false,
             items: [
                 WithItem {
                     range: 318..325,
@@ -688,6 +705,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 332..355,
+            is_async: false,
             items: [
                 WithItem {
                     range: 337..349,
@@ -744,6 +762,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 356..375,
+            is_async: false,
             items: [
                 WithItem {
                     range: 361..369,
@@ -783,6 +802,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 376..400,
+            is_async: false,
             items: [
                 WithItem {
                     range: 381..394,
@@ -830,6 +850,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 401..428,
+            is_async: false,
             items: [
                 WithItem {
                     range: 406..422,
@@ -898,6 +919,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 429..461,
+            is_async: false,
             items: [
                 WithItem {
                     range: 434..455,
@@ -974,6 +996,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 462..481,
+            is_async: false,
             items: [
                 WithItem {
                     range: 468..474,
@@ -1009,6 +1032,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 482..502,
+            is_async: false,
             items: [
                 WithItem {
                     range: 488..494,
@@ -1044,6 +1068,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 503..530,
+            is_async: false,
             items: [
                 WithItem {
                     range: 509..515,
@@ -1100,6 +1125,7 @@ expression: "ast::Suite::parse(source, \"<test>\").unwrap()"
     With(
         StmtWith {
             range: 531..559,
+            is_async: false,
             items: [
                 WithItem {
                     range: 537..543,
diff --git a/crates/ruff_python_semantic/src/analyze/visibility.rs b/crates/ruff_python_semantic/src/analyze/visibility.rs
index bc2d536938..846e41fa67 100644
--- a/crates/ruff_python_semantic/src/analyze/visibility.rs
+++ b/crates/ruff_python_semantic/src/analyze/visibility.rs
@@ -178,8 +178,7 @@ impl ModuleSource<'_> {
 
 pub(crate) fn function_visibility(stmt: &Stmt) -> Visibility {
     match stmt {
-        Stmt::FunctionDef(ast::StmtFunctionDef { name, .. })
-        | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef { name, .. }) => {
+        Stmt::FunctionDef(ast::StmtFunctionDef { name, .. }) => {
             if name.starts_with('_') {
                 Visibility::Private
             } else {
@@ -191,52 +190,45 @@ pub(crate) fn function_visibility(stmt: &Stmt) -> Visibility {
 }
 
 pub(crate) fn method_visibility(stmt: &Stmt) -> Visibility {
-    match stmt {
-        Stmt::FunctionDef(ast::StmtFunctionDef {
-            name,
-            decorator_list,
-            ..
+    let Stmt::FunctionDef(ast::StmtFunctionDef {
+        name,
+        decorator_list,
+        ..
+    }) = stmt
+    else {
+        panic!("Found non-FunctionDef in method_visibility")
+    };
+
+    // Is this a setter or deleter?
+    if decorator_list.iter().any(|decorator| {
+        collect_call_path(&decorator.expression).is_some_and(|call_path| {
+            call_path.as_slice() == [name, "setter"] || call_path.as_slice() == [name, "deleter"]
         })
-        | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef {
-            name,
-            decorator_list,
-            ..
-        }) => {
-            // Is this a setter or deleter?
-            if decorator_list.iter().any(|decorator| {
-                collect_call_path(&decorator.expression).is_some_and(|call_path| {
-                    call_path.as_slice() == [name, "setter"]
-                        || call_path.as_slice() == [name, "deleter"]
-                })
-            }) {
-                return Visibility::Private;
-            }
-
-            // Is the method non-private?
-            if !name.starts_with('_') {
-                return Visibility::Public;
-            }
-
-            // Is this a magic method?
-            if name.starts_with("__") && name.ends_with("__") {
-                return Visibility::Public;
-            }
-
-            Visibility::Private
-        }
-        _ => panic!("Found non-FunctionDef in method_visibility"),
+    }) {
+        return Visibility::Private;
     }
+
+    // Is the method non-private?
+    if !name.starts_with('_') {
+        return Visibility::Public;
+    }
+
+    // Is this a magic method?
+    if name.starts_with("__") && name.ends_with("__") {
+        return Visibility::Public;
+    }
+
+    Visibility::Private
 }
 
 pub(crate) fn class_visibility(stmt: &Stmt) -> Visibility {
-    match stmt {
-        Stmt::ClassDef(ast::StmtClassDef { name, .. }) => {
-            if name.starts_with('_') {
-                Visibility::Private
-            } else {
-                Visibility::Public
-            }
-        }
-        _ => panic!("Found non-ClassDef in function_visibility"),
+    let Stmt::ClassDef(ast::StmtClassDef { name, .. }) = stmt else {
+        panic!("Found non-ClassDef in class_visibility")
+    };
+
+    if name.starts_with('_') {
+        Visibility::Private
+    } else {
+        Visibility::Public
     }
 }
diff --git a/crates/ruff_python_semantic/src/definition.rs b/crates/ruff_python_semantic/src/definition.rs
index aec18d62f5..e3a5bfd649 100644
--- a/crates/ruff_python_semantic/src/definition.rs
+++ b/crates/ruff_python_semantic/src/definition.rs
@@ -84,7 +84,6 @@ impl<'a> Member<'a> {
     pub fn name(&self) -> Option<&'a str> {
         match &self.stmt {
             Stmt::FunctionDef(ast::StmtFunctionDef { name, .. })
-            | Stmt::AsyncFunctionDef(ast::StmtAsyncFunctionDef { name, .. })
             | Stmt::ClassDef(ast::StmtClassDef { name, .. }) => Some(name),
             _ => None,
         }
diff --git a/crates/ruff_python_semantic/src/globals.rs b/crates/ruff_python_semantic/src/globals.rs
index a17b79b6f8..ffaf1b16f9 100644
--- a/crates/ruff_python_semantic/src/globals.rs
+++ b/crates/ruff_python_semantic/src/globals.rs
@@ -80,7 +80,7 @@ impl<'a> StatementVisitor<'a> for GlobalsVisitor<'a> {
                     self.0.insert(name.as_str(), *range);
                 }
             }
-            Stmt::FunctionDef(_) | Stmt::AsyncFunctionDef(_) | Stmt::ClassDef(_) => {
+            Stmt::FunctionDef(_) | Stmt::ClassDef(_) => {
                 // Don't recurse.
             }
             _ => walk_stmt(self, stmt),
diff --git a/crates/ruff_python_semantic/src/model.rs b/crates/ruff_python_semantic/src/model.rs
index 2dc7e6e69b..3ae1b06bb2 100644
--- a/crates/ruff_python_semantic/src/model.rs
+++ b/crates/ruff_python_semantic/src/model.rs
@@ -478,7 +478,7 @@ impl<'a> SemanticModel<'a> {
                 }
             }
 
-            seen_function |= scope.kind.is_any_function();
+            seen_function |= scope.kind.is_function();
             import_starred = import_starred || scope.uses_star_imports();
         }
 
@@ -540,7 +540,7 @@ impl<'a> SemanticModel<'a> {
                 }
             }
 
-            seen_function |= scope.kind.is_any_function();
+            seen_function |= scope.kind.is_function();
         }
 
         None
@@ -1015,11 +1015,8 @@ impl<'a> SemanticModel<'a> {
     /// Return `true` if the model is in an async context.
     pub fn in_async_context(&self) -> bool {
         for scope in self.current_scopes() {
-            if scope.kind.is_async_function() {
-                return true;
-            }
-            if scope.kind.is_function() {
-                return false;
+            if let ScopeKind::Function(ast::StmtFunctionDef { is_async, .. }) = scope.kind {
+                return *is_async;
             }
         }
         false
diff --git a/crates/ruff_python_semantic/src/scope.rs b/crates/ruff_python_semantic/src/scope.rs
index b80d612784..3de3b058f9 100644
--- a/crates/ruff_python_semantic/src/scope.rs
+++ b/crates/ruff_python_semantic/src/scope.rs
@@ -178,19 +178,12 @@ bitflags! {
 pub enum ScopeKind<'a> {
     Class(&'a ast::StmtClassDef),
     Function(&'a ast::StmtFunctionDef),
-    AsyncFunction(&'a ast::StmtAsyncFunctionDef),
     Generator,
     Module,
     Type,
     Lambda(&'a ast::ExprLambda),
 }
 
-impl ScopeKind<'_> {
-    pub const fn is_any_function(&self) -> bool {
-        matches!(self, ScopeKind::Function(_) | ScopeKind::AsyncFunction(_))
-    }
-}
-
 /// Id uniquely identifying a scope in a program.
 ///
 /// Using a `u32` is sufficient because Ruff only supports parsing documents with a size of max `u32::max`