diff --git a/extensions/vscode-api-tests/src/singlefolder-tests/notebook.document.test.ts b/extensions/vscode-api-tests/src/singlefolder-tests/notebook.document.test.ts
index 4e126b0d475..3a2c081f1d5 100644
--- a/extensions/vscode-api-tests/src/singlefolder-tests/notebook.document.test.ts
+++ b/extensions/vscode-api-tests/src/singlefolder-tests/notebook.document.test.ts
@@ -33,6 +33,7 @@ suite('Notebook Document', function () {
 	const disposables: vscode.Disposable[] = [];
 
 	suiteTeardown(async function () {
+		utils.assertNoRpc();
 		await utils.revertAllDirty();
 		await utils.closeAllEditors();
 		utils.disposeAll(disposables);