diff --git a/xtask/src/release.rs b/xtask/src/release.rs
index 14fc1f0ddf..3cf0d849f4 100644
--- a/xtask/src/release.rs
+++ b/xtask/src/release.rs
@@ -52,7 +52,14 @@ https://github.com/sponsors/rust-analyzer[GitHub Sponsors].
         let path = changelog_dir.join(format!("{}-changelog-{}.adoc", today, changelog_n));
         write_file(&path, &contents)?;
 
-        for &adoc in ["manual.adoc", "generated_features.adoc", "generated_assists.adoc"].iter() {
+        for &adoc in [
+            "manual.adoc",
+            "generated_features.adoc",
+            "generated_assists.adoc",
+            "generated_diagnostic.adoc",
+        ]
+        .iter()
+        {
             let src = project_root().join("./docs/user/").join(adoc);
             let dst = website_root.join(adoc);
             cp(src, dst)?;
diff --git a/xtask/tests/tidy.rs b/xtask/tests/tidy.rs
index 4600694074..faaef2fd45 100644
--- a/xtask/tests/tidy.rs
+++ b/xtask/tests/tidy.rs
@@ -42,6 +42,7 @@ fn smoke_test_docs_generation() {
     // We don't commit docs to the repo, so we can just overwrite in tests.
     codegen::generate_assists_docs(Mode::Overwrite).unwrap();
     codegen::generate_feature_docs(Mode::Overwrite).unwrap();
+    codegen::generate_diagnostic_docs(Mode::Overwrite).unwrap();
 }
 
 #[test]