diff --git a/crates/project/src/project.rs b/crates/project/src/project.rs
index 5c1064400e..e72ca7ac92 100644
--- a/crates/project/src/project.rs
+++ b/crates/project/src/project.rs
@@ -5337,6 +5337,7 @@ mod tests {
     #[gpui::test]
     async fn test_single_file_worktrees_diagnostics(cx: &mut gpui::TestAppContext) {
         cx.foreground().forbid_parking();
+        language::init_test(cx);
 
         let fs = FakeFs::new(cx.background());
         fs.insert_tree(