diff --git a/utils/vscode/src/extension.ts b/utils/vscode/src/extension.ts
index 90f7427e9af9..0295136d39cc 100644
--- a/utils/vscode/src/extension.ts
+++ b/utils/vscode/src/extension.ts
@@ -291,7 +291,6 @@ export function activate(context: ExtensionContext) {
   const clientOptions: LanguageClientOptions = {
     documentSelector: [
       { language: 'carbon' },
-      { language: 'carbon-testdata' },
     ],
   };