diff --git a/xtask/src/codegen.rs b/xtask/src/codegen.rs
index 7cdd8f2518..2248a079f3 100644
--- a/xtask/src/codegen.rs
+++ b/xtask/src/codegen.rs
@@ -27,9 +27,9 @@ pub(crate) use self::{
 
 pub(crate) fn docs() -> Result<()> {
     // We don't commit docs to the repo, so we can just overwrite them.
-    gen_assists_docs::generate_assists_docs(Mode::Overwrite)?;
-    gen_feature_docs::generate_feature_docs(Mode::Overwrite)?;
-    gen_diagnostic_docs::generate_diagnostic_docs(Mode::Overwrite)?;
+    gen_assists_docs::generate_assists_docs()?;
+    gen_feature_docs::generate_feature_docs()?;
+    gen_diagnostic_docs::generate_diagnostic_docs()?;
     Ok(())
 }
 
diff --git a/xtask/src/codegen/gen_assists_docs.rs b/xtask/src/codegen/gen_assists_docs.rs
index c469b388d9..a5af1331df 100644
--- a/xtask/src/codegen/gen_assists_docs.rs
+++ b/xtask/src/codegen/gen_assists_docs.rs
@@ -12,12 +12,12 @@ pub(crate) fn generate_assists_tests(mode: Mode) -> Result<()> {
     generate_tests(&assists, mode)
 }
 
-pub(crate) fn generate_assists_docs(mode: Mode) -> Result<()> {
+pub(crate) fn generate_assists_docs() -> Result<()> {
     let assists = Assist::collect()?;
     let contents = assists.into_iter().map(|it| it.to_string()).collect::<Vec<_>>().join("\n\n");
     let contents = format!("//{}\n{}\n", PREAMBLE, contents.trim());
     let dst = project_root().join("docs/user/generated_assists.adoc");
-    codegen::update(&dst, &contents, mode)
+    codegen::update(&dst, &contents, Mode::Overwrite)
 }
 
 #[derive(Debug)]
diff --git a/xtask/src/codegen/gen_diagnostic_docs.rs b/xtask/src/codegen/gen_diagnostic_docs.rs
index a2561817b9..2504e09efd 100644
--- a/xtask/src/codegen/gen_diagnostic_docs.rs
+++ b/xtask/src/codegen/gen_diagnostic_docs.rs
@@ -7,13 +7,13 @@ use crate::{
     project_root, rust_files, Result,
 };
 
-pub(crate) fn generate_diagnostic_docs(mode: Mode) -> Result<()> {
+pub(crate) fn generate_diagnostic_docs() -> Result<()> {
     let diagnostics = Diagnostic::collect()?;
     let contents =
         diagnostics.into_iter().map(|it| it.to_string()).collect::<Vec<_>>().join("\n\n");
     let contents = format!("//{}\n{}\n", PREAMBLE, contents.trim());
     let dst = project_root().join("docs/user/generated_diagnostic.adoc");
-    codegen::update(&dst, &contents, mode)?;
+    codegen::update(&dst, &contents, Mode::Overwrite)?;
     Ok(())
 }
 
diff --git a/xtask/src/codegen/gen_feature_docs.rs b/xtask/src/codegen/gen_feature_docs.rs
index cad7ff477f..8509fec269 100644
--- a/xtask/src/codegen/gen_feature_docs.rs
+++ b/xtask/src/codegen/gen_feature_docs.rs
@@ -7,12 +7,12 @@ use crate::{
     project_root, rust_files, Result,
 };
 
-pub(crate) fn generate_feature_docs(mode: Mode) -> Result<()> {
+pub(crate) fn generate_feature_docs() -> Result<()> {
     let features = Feature::collect()?;
     let contents = features.into_iter().map(|it| it.to_string()).collect::<Vec<_>>().join("\n\n");
     let contents = format!("//{}\n{}\n", PREAMBLE, contents.trim());
     let dst = project_root().join("docs/user/generated_features.adoc");
-    codegen::update(&dst, &contents, mode)?;
+    codegen::update(&dst, &contents, Mode::Overwrite)?;
     Ok(())
 }
 
diff --git a/xtask/src/tidy.rs b/xtask/src/tidy.rs
index 03b4c00926..096bc3af13 100644
--- a/xtask/src/tidy.rs
+++ b/xtask/src/tidy.rs
@@ -31,7 +31,7 @@ fn generate_assists_tests() {
 #[test]
 #[ignore]
 fn generate_lint_completions() {
-    codegen::generate_lint_completions(Mode::Overwrite).unwrap()
+    codegen::generate_lint_completions(Mode::Ensure).unwrap()
 }
 
 #[test]