// Next two EnsureImageExists should be blocked because maxParallelImagePulls is hit
	for i := 0; i < 2; i++ {
		wg.Add(1)
		go func() {
			_, _, err := puller.EnsureImageExists(ctx, pod, container, nil, nil, "")
			assert.Nil(t, err)
			wg.Done()
		}()
	}
	time.Sleep(1 * time.Second)
	fakeRuntime.AssertCallCounts("PullImage", 5)

	// Unblock two image pulls from runtime, and two EnsureImageExists can go through