diff --git a/Cargo.lock b/Cargo.lock
index 8e13417069..11293fa2b7 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -1985,6 +1985,7 @@ dependencies = [
  "result-like",
  "ruff_macros",
  "ruff_python",
+ "ruff_rustpython",
  "rustc-hash",
  "rustpython-common",
  "rustpython-parser",
@@ -2109,6 +2110,7 @@ dependencies = [
  "insta",
  "once_cell",
  "ruff_formatter",
+ "ruff_rustpython",
  "ruff_testing_macros",
  "ruff_text_size",
  "rustc-hash",
@@ -2118,6 +2120,16 @@ dependencies = [
  "test-case",
 ]
 
+[[package]]
+name = "ruff_rustpython"
+version = "0.0.0"
+dependencies = [
+ "anyhow",
+ "once_cell",
+ "rustpython-common",
+ "rustpython-parser",
+]
+
 [[package]]
 name = "ruff_testing_macros"
 version = "0.0.0"
diff --git a/crates/ruff/Cargo.toml b/crates/ruff/Cargo.toml
index 5cf8cc2844..e100007472 100644
--- a/crates/ruff/Cargo.toml
+++ b/crates/ruff/Cargo.toml
@@ -16,6 +16,10 @@ crate-type = ["cdylib", "rlib"]
 doctest = false
 
 [dependencies]
+ruff_macros = { path = "../ruff_macros" }
+ruff_python = { path = "../ruff_python" }
+ruff_rustpython = { path = "../ruff_rustpython" }
+
 anyhow = { workspace = true }
 bisection = { version = "0.1.0" }
 bitflags = { version = "1.3.2" }
@@ -40,8 +44,6 @@ once_cell = { workspace = true }
 path-absolutize = { version = "3.0.14", features = ["once_cell_cache", "use_unix_paths_on_wasm"] }
 regex = { workspace = true }
 result-like = "0.4.6"
-ruff_macros = { path = "../ruff_macros" }
-ruff_python = { path = "../ruff_python" }
 rustc-hash = { workspace = true }
 rustpython-common = { workspace = true }
 rustpython-parser = { workspace = true }
diff --git a/crates/ruff/src/lib.rs b/crates/ruff/src/lib.rs
index a1f93144a1..df85cd0838 100644
--- a/crates/ruff/src/lib.rs
+++ b/crates/ruff/src/lib.rs
@@ -33,10 +33,8 @@ pub mod resolver;
 mod rule_redirects;
 mod rule_selector;
 mod rules;
-mod rustpython_helpers;
 pub mod settings;
 pub mod source_code;
-mod vendor;
 mod violation;
 mod visibility;
 
diff --git a/crates/ruff/src/lib_wasm.rs b/crates/ruff/src/lib_wasm.rs
index 203c262171..fcbcb79a52 100644
--- a/crates/ruff/src/lib_wasm.rs
+++ b/crates/ruff/src/lib_wasm.rs
@@ -14,7 +14,6 @@ use crate::rules::{
     flake8_quotes, flake8_self, flake8_tidy_imports, flake8_type_checking, flake8_unused_arguments,
     isort, mccabe, pep8_naming, pycodestyle, pydocstyle, pylint, pyupgrade,
 };
-use crate::rustpython_helpers::tokenize;
 use crate::settings::configuration::Configuration;
 use crate::settings::options::Options;
 use crate::settings::{defaults, flags, Settings};
@@ -175,7 +174,7 @@ pub fn check(contents: &str, options: JsValue) -> Result<JsValue, JsValue> {
         Settings::from_configuration(configuration, Path::new(".")).map_err(|e| e.to_string())?;
 
     // Tokenize once.
-    let tokens: Vec<LexResult> = tokenize(contents);
+    let tokens: Vec<LexResult> = ruff_rustpython::tokenize(contents);
 
     // Map row and column locations to byte slices (lazily).
     let locator = Locator::new(contents);
diff --git a/crates/ruff/src/linter.rs b/crates/ruff/src/linter.rs
index 2737d64f58..f16bf31d7d 100644
--- a/crates/ruff/src/linter.rs
+++ b/crates/ruff/src/linter.rs
@@ -24,7 +24,7 @@ use crate::registry::{Diagnostic, LintSource, Rule};
 use crate::rules::pycodestyle;
 use crate::settings::{flags, Settings};
 use crate::source_code::{Indexer, Locator, Stylist};
-use crate::{directives, fs, rustpython_helpers};
+use crate::{directives, fs};
 
 const CARGO_PKG_NAME: &str = env!("CARGO_PKG_NAME");
 const CARGO_PKG_REPOSITORY: &str = env!("CARGO_PKG_REPOSITORY");
@@ -115,7 +115,7 @@ pub fn check_path(
             .iter_enabled()
             .any(|rule_code| matches!(rule_code.lint_source(), LintSource::Imports));
     if use_ast || use_imports || use_doc_lines {
-        match rustpython_helpers::parse_program_tokens(tokens, &path.to_string_lossy()) {
+        match ruff_rustpython::parse_program_tokens(tokens, &path.to_string_lossy()) {
             Ok(python_ast) => {
                 if use_ast {
                     diagnostics.extend(check_ast(
@@ -226,7 +226,7 @@ pub fn add_noqa_to_path(path: &Path, package: Option<&Path>, settings: &Settings
     let contents = std::fs::read_to_string(path)?;
 
     // Tokenize once.
-    let tokens: Vec<LexResult> = rustpython_helpers::tokenize(&contents);
+    let tokens: Vec<LexResult> = ruff_rustpython::tokenize(&contents);
 
     // Map row and column locations to byte slices (lazily).
     let locator = Locator::new(&contents);
@@ -290,7 +290,7 @@ pub fn lint_only(
     autofix: flags::Autofix,
 ) -> LinterResult<Vec<Message>> {
     // Tokenize once.
-    let tokens: Vec<LexResult> = rustpython_helpers::tokenize(contents);
+    let tokens: Vec<LexResult> = ruff_rustpython::tokenize(contents);
 
     // Map row and column locations to byte slices (lazily).
     let locator = Locator::new(contents);
@@ -359,7 +359,7 @@ pub fn lint_fix<'a>(
     // Continuously autofix until the source code stabilizes.
     loop {
         // Tokenize once.
-        let tokens: Vec<LexResult> = rustpython_helpers::tokenize(&transformed);
+        let tokens: Vec<LexResult> = ruff_rustpython::tokenize(&transformed);
 
         // Map row and column locations to byte slices (lazily).
         let locator = Locator::new(&transformed);
diff --git a/crates/ruff/src/rules/pandas_vet/mod.rs b/crates/ruff/src/rules/pandas_vet/mod.rs
index 7de30c7043..8e9f8a6171 100644
--- a/crates/ruff/src/rules/pandas_vet/mod.rs
+++ b/crates/ruff/src/rules/pandas_vet/mod.rs
@@ -18,12 +18,12 @@ mod tests {
     use crate::settings::flags;
     use crate::source_code::{Indexer, Locator, Stylist};
     use crate::test::test_path;
-    use crate::{directives, rustpython_helpers, settings};
+    use crate::{directives, settings};
 
     fn rule_code(contents: &str, expected: &[Rule]) {
         let contents = dedent(contents);
         let settings = settings::Settings::for_rules(&Linter::PandasVet);
-        let tokens: Vec<LexResult> = rustpython_helpers::tokenize(&contents);
+        let tokens: Vec<LexResult> = ruff_rustpython::tokenize(&contents);
         let locator = Locator::new(&contents);
         let stylist = Stylist::from_contents(&contents, &locator);
         let indexer: Indexer = tokens.as_slice().into();
diff --git a/crates/ruff/src/rules/pyflakes/mod.rs b/crates/ruff/src/rules/pyflakes/mod.rs
index 6db17a0888..a63cdf7f61 100644
--- a/crates/ruff/src/rules/pyflakes/mod.rs
+++ b/crates/ruff/src/rules/pyflakes/mod.rs
@@ -20,7 +20,7 @@ mod tests {
     use crate::settings::flags;
     use crate::source_code::{Indexer, Locator, Stylist};
     use crate::test::test_path;
-    use crate::{directives, rustpython_helpers, settings};
+    use crate::{directives, settings};
 
     #[test_case(Rule::UnusedImport, Path::new("F401_0.py"); "F401_0")]
     #[test_case(Rule::UnusedImport, Path::new("F401_1.py"); "F401_1")]
@@ -243,7 +243,7 @@ mod tests {
     fn flakes(contents: &str, expected: &[Rule]) {
         let contents = dedent(contents);
         let settings = settings::Settings::for_rules(&Linter::Pyflakes);
-        let tokens: Vec<LexResult> = rustpython_helpers::tokenize(&contents);
+        let tokens: Vec<LexResult> = ruff_rustpython::tokenize(&contents);
         let locator = Locator::new(&contents);
         let stylist = Stylist::from_contents(&contents, &locator);
         let indexer: Indexer = tokens.as_slice().into();
diff --git a/crates/ruff/src/source_code/generator.rs b/crates/ruff/src/source_code/generator.rs
index 33071934bf..408bde05ba 100644
--- a/crates/ruff/src/source_code/generator.rs
+++ b/crates/ruff/src/source_code/generator.rs
@@ -8,8 +8,9 @@ use rustpython_parser::ast::{
     Suite, Withitem,
 };
 
+use ruff_rustpython::vendor::{bytes, str};
+
 use crate::source_code::stylist::{Indentation, LineEnding, Quote, Stylist};
-use crate::vendor::{bytes, str};
 
 mod precedence {
     pub const ASSIGN: u8 = 3;
diff --git a/crates/ruff/src/source_code/stylist.rs b/crates/ruff/src/source_code/stylist.rs
index 73a022d848..8b4c726566 100644
--- a/crates/ruff/src/source_code/stylist.rs
+++ b/crates/ruff/src/source_code/stylist.rs
@@ -4,13 +4,13 @@ use std::fmt;
 use std::ops::Deref;
 
 use once_cell::unsync::OnceCell;
+use ruff_rustpython::vendor;
 use rustpython_parser::ast::Location;
 use rustpython_parser::{lexer, Mode, Tok};
 
 use crate::ast::types::Range;
 use crate::rules::pydocstyle::helpers::leading_quote;
 use crate::source_code::Locator;
-use crate::vendor;
 
 pub struct Stylist<'a> {
     contents: &'a str,
diff --git a/crates/ruff/src/test.rs b/crates/ruff/src/test.rs
index c1bc2fe445..fb58227714 100644
--- a/crates/ruff/src/test.rs
+++ b/crates/ruff/src/test.rs
@@ -7,12 +7,12 @@ use anyhow::Result;
 use rustpython_parser::lexer::LexResult;
 
 use crate::autofix::fix_file;
+use crate::directives;
 use crate::linter::{check_path, LinterResult};
 use crate::packaging::detect_package_root;
 use crate::registry::Diagnostic;
 use crate::settings::{flags, Settings};
 use crate::source_code::{Indexer, Locator, Stylist};
-use crate::{directives, rustpython_helpers};
 
 pub fn test_resource_path(path: impl AsRef<Path>) -> std::path::PathBuf {
     Path::new("./resources/test/").join(path)
@@ -23,7 +23,7 @@ pub fn test_resource_path(path: impl AsRef<Path>) -> std::path::PathBuf {
 pub fn test_path(path: &Path, settings: &Settings) -> Result<Vec<Diagnostic>> {
     let path = test_resource_path("fixtures").join(path);
     let contents = std::fs::read_to_string(&path)?;
-    let tokens: Vec<LexResult> = rustpython_helpers::tokenize(&contents);
+    let tokens: Vec<LexResult> = ruff_rustpython::tokenize(&contents);
     let locator = Locator::new(&contents);
     let stylist = Stylist::from_contents(&contents, &locator);
     let indexer: Indexer = tokens.as_slice().into();
@@ -58,7 +58,7 @@ pub fn test_path(path: &Path, settings: &Settings) -> Result<Vec<Diagnostic>> {
         let mut iterations = 0;
 
         loop {
-            let tokens: Vec<LexResult> = rustpython_helpers::tokenize(&contents);
+            let tokens: Vec<LexResult> = ruff_rustpython::tokenize(&contents);
             let locator = Locator::new(&contents);
             let stylist = Stylist::from_contents(&contents, &locator);
             let indexer: Indexer = tokens.as_slice().into();
diff --git a/crates/ruff_python_formatter/Cargo.toml b/crates/ruff_python_formatter/Cargo.toml
index a7e76f31f9..5d08682017 100644
--- a/crates/ruff_python_formatter/Cargo.toml
+++ b/crates/ruff_python_formatter/Cargo.toml
@@ -6,17 +6,20 @@ edition = { workspace = true }
 rust-version = { workspace = true }
 
 [dependencies]
+ruff_formatter = { path = "../ruff_formatter" }
+ruff_rustpython = { path = "../ruff_rustpython" }
+ruff_text_size = { path = "../ruff_text_size" }
+
 anyhow = { workspace = true }
 clap = { workspace = true }
 once_cell = { workspace = true }
-ruff_formatter = { path = "../ruff_formatter" }
-ruff_text_size = { path = "../ruff_text_size" }
 rustc-hash = { workspace = true }
 rustpython-common = { workspace = true }
 rustpython-parser = { workspace = true }
 
 [dev-dependencies]
+ruff_testing_macros = { path = "../ruff_testing_macros" }
+
 insta = { version = "1.19.0", features = [] }
 test-case = { version = "2.2.2" }
-ruff_testing_macros = { path = "../ruff_testing_macros" }
-similar = "2.2.1"
+similar = { version = "2.2.1" }
diff --git a/crates/ruff_python_formatter/src/core/mod.rs b/crates/ruff_python_formatter/src/core/mod.rs
index ac97bd01f3..3812c9abd1 100644
--- a/crates/ruff_python_formatter/src/core/mod.rs
+++ b/crates/ruff_python_formatter/src/core/mod.rs
@@ -1,4 +1,3 @@
 pub mod locator;
-pub mod rustpython_helpers;
 pub mod types;
 pub mod visitor;
diff --git a/crates/ruff_python_formatter/src/core/rustpython_helpers.rs b/crates/ruff_python_formatter/src/core/rustpython_helpers.rs
deleted file mode 100644
index 4f5638a423..0000000000
--- a/crates/ruff_python_formatter/src/core/rustpython_helpers.rs
+++ /dev/null
@@ -1,28 +0,0 @@
-use rustpython_parser as parser;
-use rustpython_parser::ast::{Mod, Suite};
-use rustpython_parser::lexer::LexResult;
-use rustpython_parser::{lexer, Mode, ParseError};
-
-/// Collect tokens up to and including the first error.
-pub fn tokenize(contents: &str) -> Vec<LexResult> {
-    let mut tokens: Vec<LexResult> = vec![];
-    for tok in lexer::lex(contents, Mode::Module) {
-        let is_err = tok.is_err();
-        tokens.push(tok);
-        if is_err {
-            break;
-        }
-    }
-    tokens
-}
-
-/// Parse a full Python program from its tokens.
-pub(crate) fn parse_program_tokens(
-    lxr: Vec<LexResult>,
-    source_path: &str,
-) -> anyhow::Result<Suite, ParseError> {
-    parser::parse_tokens(lxr, Mode::Module, source_path).map(|top| match top {
-        Mod::Module { body, .. } => body,
-        _ => unreachable!(),
-    })
-}
diff --git a/crates/ruff_python_formatter/src/lib.rs b/crates/ruff_python_formatter/src/lib.rs
index a960c60b32..9a263fc41a 100644
--- a/crates/ruff_python_formatter/src/lib.rs
+++ b/crates/ruff_python_formatter/src/lib.rs
@@ -5,7 +5,6 @@ use rustpython_parser::lexer::LexResult;
 use crate::attachment::attach;
 use crate::context::ASTFormatContext;
 use crate::core::locator::Locator;
-use crate::core::rustpython_helpers;
 use crate::cst::Stmt;
 use crate::newlines::normalize_newlines;
 use crate::parentheses::normalize_parentheses;
@@ -24,13 +23,13 @@ pub mod trivia;
 
 pub fn fmt(contents: &str) -> Result<Formatted<ASTFormatContext>> {
     // Tokenize once.
-    let tokens: Vec<LexResult> = rustpython_helpers::tokenize(contents);
+    let tokens: Vec<LexResult> = ruff_rustpython::tokenize(contents);
 
     // Extract trivia.
     let trivia = trivia::extract_trivia_tokens(&tokens);
 
     // Parse the AST.
-    let python_ast = rustpython_helpers::parse_program_tokens(tokens, "<filename>")?;
+    let python_ast = ruff_rustpython::parse_program_tokens(tokens, "<filename>")?;
 
     // Convert to a CST.
     let mut python_cst: Vec<Stmt> = python_ast.into_iter().map(Into::into).collect();
diff --git a/crates/ruff_rustpython/Cargo.toml b/crates/ruff_rustpython/Cargo.toml
new file mode 100644
index 0000000000..3c4b893d07
--- /dev/null
+++ b/crates/ruff_rustpython/Cargo.toml
@@ -0,0 +1,14 @@
+[package]
+name = "ruff_rustpython"
+version = "0.0.0"
+publish = false
+edition = { workspace = true }
+rust-version = { workspace = true }
+
+[lib]
+
+[dependencies]
+anyhow = { workspace = true }
+once_cell = { workspace = true }
+rustpython-common = { workspace = true }
+rustpython-parser = { workspace = true }
diff --git a/crates/ruff/src/rustpython_helpers.rs b/crates/ruff_rustpython/src/lib.rs
similarity index 94%
rename from crates/ruff/src/rustpython_helpers.rs
rename to crates/ruff_rustpython/src/lib.rs
index 4f5638a423..a40a9db739 100644
--- a/crates/ruff/src/rustpython_helpers.rs
+++ b/crates/ruff_rustpython/src/lib.rs
@@ -3,6 +3,8 @@ use rustpython_parser::ast::{Mod, Suite};
 use rustpython_parser::lexer::LexResult;
 use rustpython_parser::{lexer, Mode, ParseError};
 
+pub mod vendor;
+
 /// Collect tokens up to and including the first error.
 pub fn tokenize(contents: &str) -> Vec<LexResult> {
     let mut tokens: Vec<LexResult> = vec![];
@@ -17,7 +19,7 @@ pub fn tokenize(contents: &str) -> Vec<LexResult> {
 }
 
 /// Parse a full Python program from its tokens.
-pub(crate) fn parse_program_tokens(
+pub fn parse_program_tokens(
     lxr: Vec<LexResult>,
     source_path: &str,
 ) -> anyhow::Result<Suite, ParseError> {
diff --git a/crates/ruff/src/vendor/bytes.rs b/crates/ruff_rustpython/src/vendor/bytes.rs
similarity index 100%
rename from crates/ruff/src/vendor/bytes.rs
rename to crates/ruff_rustpython/src/vendor/bytes.rs
diff --git a/crates/ruff/src/vendor/mod.rs b/crates/ruff_rustpython/src/vendor/mod.rs
similarity index 100%
rename from crates/ruff/src/vendor/mod.rs
rename to crates/ruff_rustpython/src/vendor/mod.rs
diff --git a/crates/ruff/src/vendor/str.rs b/crates/ruff_rustpython/src/vendor/str.rs
similarity index 100%
rename from crates/ruff/src/vendor/str.rs
rename to crates/ruff_rustpython/src/vendor/str.rs