pod2.Spec.SecurityContext = &v1.PodSecurityContext{
		FSGroup: &fsGroup2,
	}
	err = testFSGroupMount(plug, pod1, tmpDir, fsGroup1)
	if err != nil {
		t.Errorf("Failed to make a new Mounter: %v", err)
	}
	err = testFSGroupMount(plug, pod2, tmpDir, fsGroup2)
	if err != nil {
		t.Errorf("Failed to make a new Mounter: %v", err)
	}

		}

		if err := customUnmapper.TearDownDevice(globalPath, devPath); err != nil {
			t.Errorf("TearDownDevice failed, err: %v", err)
		}
	}
}

func testFSGroupMount(plug volume.VolumePlugin, pod *v1.Pod, tmpDir string, fsGroup int64) error {
	mounter, err := plug.NewMounter(getTestVolume(false, tmpDir, false, nil), pod, volume.VolumeOptions{})
	if err != nil {
		return err
	}