diff --git a/packages/aws-cdk/test/cdk-toolkit.test.ts b/packages/aws-cdk/test/cdk-toolkit.test.ts
index 3b7ae858a6ecb..3ff5f013f0bd5 100644
--- a/packages/aws-cdk/test/cdk-toolkit.test.ts
+++ b/packages/aws-cdk/test/cdk-toolkit.test.ts
@@ -18,8 +18,8 @@ const fakeChokidarWatcherOn = {
   },
 
   get fileEventCallback(): (
-    event: 'add' | 'addDir' | 'change' | 'unlink' | 'unlinkDir',
-    path: string,
+  event: 'add' | 'addDir' | 'change' | 'unlink' | 'unlinkDir',
+  path: string,
   ) => Promise<void> {
     expect(mockChokidarWatcherOn.mock.calls.length).toBeGreaterThanOrEqual(2);
     const secondCall = mockChokidarWatcherOn.mock.calls[1];