cancel := func() {
		cl()
		wg.Done()
	}

	if !dm.GetLock(ctx, cancel, id, source, Options{Timeout: 5 * time.Minute}) {
		t.Fatal("GetLock() should be successful")
	}

	// Wait until context is canceled
	wg.Wait()
	if ctx.Err() == nil {
		t.Fatal("Unexpected error", ctx.Err())
	}

	// Should be safe operation in all cases
	dm.Unlock(context.Background())
}