diff --git a/internal/pkg/provisioner/storageos.go b/internal/pkg/provisioner/storageos.go
index 8d1fda6b..8b0fd0c1 100644
--- a/internal/pkg/provisioner/storageos.go
+++ b/internal/pkg/provisioner/storageos.go
@@ -8,6 +8,7 @@ import (
 	"github.com/pkg/errors"
 	corev1 "k8s.io/api/core/v1"
 	storagev1 "k8s.io/api/storage/v1"
+	apierrors "k8s.io/apimachinery/pkg/api/errors"
 	"k8s.io/apimachinery/pkg/types"
 	"sigs.k8s.io/controller-runtime/pkg/client"
 )
@@ -111,12 +112,6 @@ func IsProvisionedStorageClass(sc *storagev1.StorageClass, provisioners ...strin
 // IsStorageOSVolume returns true if the volume's PVC was provisioned by
 // StorageOS.  The namespace of the Pod/PVC must be provided.
 func IsStorageOSVolume(k8s client.Client, volume corev1.Volume, namespace string) (bool, error) {
-	return IsProvisionedVolume(k8s, volume, namespace, DriverName)
-}
-
-// IsProvisionedVolume returns true if the volume's PVC was provided by one of
-// the given provisioners.
-func IsProvisionedVolume(k8s client.Client, volume corev1.Volume, namespace string, provisioners ...string) (bool, error) {
 	// Ensure that the volume has a claim.
 	if volume.PersistentVolumeClaim == nil {
 		return false, nil
@@ -129,8 +124,11 @@ func IsProvisionedVolume(k8s client.Client, volume corev1.Volume, namespace stri
 		Namespace: namespace,
 	}
 	if err := k8s.Get(context.Background(), key, pvc); err != nil {
-		return false, errors.Wrap(err, "failed to get PVC")
+		if apierrors.IsNotFound(err) {
+			return false, nil
+		}
+		return false, errors.Wrap(err, "failed to get PVCxxxx")
 	}
 
-	return IsProvisionedPVC(k8s, *pvc, namespace, provisioners...)
+	return IsProvisionedPVC(k8s, *pvc, namespace, DriverName)
 }
diff --git a/internal/pkg/provisioner/storageos_test.go b/internal/pkg/provisioner/storageos_test.go
index 729fa3be..5e768ef9 100644
--- a/internal/pkg/provisioner/storageos_test.go
+++ b/internal/pkg/provisioner/storageos_test.go
@@ -161,18 +161,85 @@ func TestHasStorageOSAnnotation(t *testing.T) {
 	}
 }
 
-func TestIsProvisionedVolume(t *testing.T) {
+func Test_IsStorageOSVolume(t *testing.T) {
 	t.Parallel()
 
-	provisioned, err := IsProvisionedVolume(nil, corev1.Volume{}, "")
+	stosSC := storagev1.StorageClass{
+		ObjectMeta: metav1.ObjectMeta{
+			Name: "fast",
+		},
+		Provisioner: DriverName,
+	}
+	nonStosSC := storagev1.StorageClass{
+		ObjectMeta: metav1.ObjectMeta{
+			Name: "slow",
+		},
+		Provisioner: "foo-provisioner",
+	}
+
+	stosPVC := createPVC("storageos", "default", stosSC.Name, false)
+	nonStosPVC := createPVC("non-storageos", "default", nonStosSC.Name, false)
 
-	if provisioned {
-		t.Errorf("IsProvisionedVolume() = %t", provisioned)
-		return
+	tests := []struct {
+		name    string
+		volume  corev1.Volume
+		want    bool
+		wantErr bool
+	}{
+		{
+			name:   "no PVC",
+			volume: corev1.Volume{},
+			want:   false,
+		},
+		{
+			name: "PVC not exists",
+			volume: corev1.Volume{
+				VolumeSource: corev1.VolumeSource{
+					PersistentVolumeClaim: &corev1.PersistentVolumeClaimVolumeSource{
+						ClaimName: "non-exists",
+					},
+				},
+			},
+			want: false,
+		},
+		{
+			name: "non StorageOS PVC",
+			volume: corev1.Volume{
+				VolumeSource: corev1.VolumeSource{
+					PersistentVolumeClaim: &corev1.PersistentVolumeClaimVolumeSource{
+						ClaimName: nonStosPVC.Name,
+					},
+				},
+			},
+			want: false,
+		},
+		{
+			name: "StorageOS PVC",
+			volume: corev1.Volume{
+				VolumeSource: corev1.VolumeSource{
+					PersistentVolumeClaim: &corev1.PersistentVolumeClaimVolumeSource{
+						ClaimName: stosPVC.Name,
+					},
+				},
+			},
+			want: true,
+		},
 	}
-	if err != nil {
-		t.Errorf("IsProvisionedVolume() error = %v, not allowed", err)
-		return
+	for _, tt := range tests {
+		var tt = tt
+		t.Run(tt.name, func(t *testing.T) {
+			t.Parallel()
+
+			k8s := fake.NewClientBuilder().WithObjects(&stosSC, &nonStosSC, &stosPVC, &nonStosPVC).Build()
+
+			got, gotErr := IsStorageOSVolume(k8s, tt.volume, "default")
+			if (gotErr != nil) != tt.wantErr {
+				t.Errorf("IsStorageOSVolume() error = %v, wantErr %t", gotErr, tt.wantErr)
+			}
+			if got != tt.want {
+				t.Errorf("IsStorageOSVolume() = %v, want %v", got, tt.want)
+			}
+		})
 	}
 }