diff --git a/crates/project/src/project.rs b/crates/project/src/project.rs
index 182e205cc2..f23df06eb7 100644
--- a/crates/project/src/project.rs
+++ b/crates/project/src/project.rs
@@ -475,7 +475,10 @@ impl Project {
 
     fn add_worktree(&mut self, worktree: ModelHandle<Worktree>, cx: &mut ModelContext<Self>) {
         cx.observe(&worktree, |_, _, cx| cx.notify()).detach();
-        cx.subscribe(&worktree, |_, worktree, event, cx| match event {
+        cx.subscribe(&worktree, |this, worktree, event, cx| match event {
+            worktree::Event::LanguageRegistered => {
+                this.diagnose(cx);
+            }
             worktree::Event::DiagnosticsUpdated(path) => {
                 cx.emit(Event::DiagnosticsUpdated(ProjectPath {
                     worktree_id: worktree.id(),
diff --git a/crates/project/src/worktree.rs b/crates/project/src/worktree.rs
index 86bdeae706..82a0755223 100644
--- a/crates/project/src/worktree.rs
+++ b/crates/project/src/worktree.rs
@@ -68,6 +68,7 @@ pub enum Worktree {
 
 #[derive(Debug)]
 pub enum Event {
+    LanguageRegistered,
     DiagnosticsUpdated(Arc<Path>),
 }
 
@@ -1060,6 +1061,7 @@ impl LocalWorktree {
     ) -> Option<Arc<LanguageServer>> {
         if !self.languages.iter().any(|l| Arc::ptr_eq(l, language)) {
             self.languages.push(language.clone());
+            cx.emit(Event::LanguageRegistered);
         }
 
         if let Some(server) = self.language_servers.get(language.name()) {