diff --git a/pkg/volume/csi/csi_attacher_test.go b/pkg/volume/csi/csi_attacher_test.go
index 9266acbb145..159d5161bfa 100644
--- a/pkg/volume/csi/csi_attacher_test.go
+++ b/pkg/volume/csi/csi_attacher_test.go
@@ -582,6 +582,13 @@ func TestAttacherUnmountDevice(t *testing.T) {
 			deviceMountPath: "/tmp/csi-test049507108/plugins/csi/pv/test-pv-name/globalmount",
 			stageUnstageSet: true,
 		},
+		{
+			testName:        "no volID",
+			volID:           "",
+			deviceMountPath: "/tmp/csi-test049507108/plugins/csi/pv/test-pv-name/globalmount",
+			stageUnstageSet: true,
+			shouldFail:      true,
+		},
 		{
 			testName:        "no device mount path",
 			volID:           "project/zone/test-vol1",