t.Fatalf("failed to attach: %v", err)
			}

			trigerWatchEventTime := tc.trigerWatchEventTime
			finalAttached := tc.finalAttached
			finalAttachErr := tc.finalAttachErr
			var wg sync.WaitGroup
			// after timeout, fakeWatcher will be closed by csiAttacher.waitForVolumeAttachment
			if tc.trigerWatchEventTime > 0 && tc.trigerWatchEventTime < tc.timeout {
				wg.Add(1)
				go func() {
					defer wg.Done()