diff --git a/pkg/registry/admissionregistration/mutatingwebhookconfiguration/storage/storage.go b/pkg/registry/admissionregistration/mutatingwebhookconfiguration/storage/storage.go
index 75c92690f1f..71b5270c9b6 100644
--- a/pkg/registry/admissionregistration/mutatingwebhookconfiguration/storage/storage.go
+++ b/pkg/registry/admissionregistration/mutatingwebhookconfiguration/storage/storage.go
@@ -64,3 +64,8 @@ var _ rest.CategoriesProvider = &REST{}
 func (r *REST) Categories() []string {
 	return []string{"api-extensions"}
 }
+
+// ShortNames implements the ShortNamesProvider interface. Returns a list of short names for a resource.
+func (r *REST) ShortNames() []string {
+	return []string{"mwc"}
+}
diff --git a/pkg/registry/admissionregistration/mutatingwebhookconfiguration/storage/storage_test.go b/pkg/registry/admissionregistration/mutatingwebhookconfiguration/storage/storage_test.go
new file mode 100644
index 00000000000..9b47ce8b097
--- /dev/null
+++ b/pkg/registry/admissionregistration/mutatingwebhookconfiguration/storage/storage_test.go
@@ -0,0 +1,51 @@
+/*
+Copyright 2021 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package storage
+
+import (
+	"testing"
+
+	"k8s.io/apiserver/pkg/registry/generic"
+	etcd3testing "k8s.io/apiserver/pkg/storage/etcd3/testing"
+	"k8s.io/kubernetes/pkg/apis/admissionregistration"
+	"k8s.io/kubernetes/pkg/registry/registrytest"
+
+	// Ensure that admissionregistration package is initialized.
+	_ "k8s.io/kubernetes/pkg/apis/admissionregistration/install"
+)
+
+func newStorage(t *testing.T) (*REST, *etcd3testing.EtcdTestServer) {
+	etcdStorage, server := registrytest.NewEtcdStorage(t, admissionregistration.GroupName)
+	restOptions := generic.RESTOptions{
+		StorageConfig:           etcdStorage,
+		Decorator:               generic.UndecoratedStorage,
+		DeleteCollectionWorkers: 1,
+		ResourcePrefix:          "mutatingwebhookconfigurations"}
+	storage, err := NewREST(restOptions)
+	if err != nil {
+		t.Fatalf("unexpected error from REST storage: %v", err)
+	}
+	return storage, server
+}
+
+func TestShortNames(t *testing.T) {
+	storage, server := newStorage(t)
+	defer server.Terminate(t)
+	defer storage.Store.DestroyFunc()
+	expected := []string{"mwc"}
+	registrytest.AssertShortNames(t, storage, expected)
+}
diff --git a/pkg/registry/admissionregistration/validatingwebhookconfiguration/storage/storage.go b/pkg/registry/admissionregistration/validatingwebhookconfiguration/storage/storage.go
index 6312f6a0cd0..8f05ec514f3 100644
--- a/pkg/registry/admissionregistration/validatingwebhookconfiguration/storage/storage.go
+++ b/pkg/registry/admissionregistration/validatingwebhookconfiguration/storage/storage.go
@@ -64,3 +64,8 @@ var _ rest.CategoriesProvider = &REST{}
 func (r *REST) Categories() []string {
 	return []string{"api-extensions"}
 }
+
+// ShortNames implements the ShortNamesProvider interface. Returns a list of short names for a resource.
+func (r *REST) ShortNames() []string {
+	return []string{"vwc"}
+}
diff --git a/pkg/registry/admissionregistration/validatingwebhookconfiguration/storage/storage_test.go b/pkg/registry/admissionregistration/validatingwebhookconfiguration/storage/storage_test.go
index cc16752bf3f..53ed68fbffc 100644
--- a/pkg/registry/admissionregistration/validatingwebhookconfiguration/storage/storage_test.go
+++ b/pkg/registry/admissionregistration/validatingwebhookconfiguration/storage/storage_test.go
@@ -199,3 +199,11 @@ func TestCategories(t *testing.T) {
 	expected := []string{"api-extensions"}
 	registrytest.AssertCategories(t, storage, expected)
 }
+
+func TestShortNames(t *testing.T) {
+	storage, server := newStorage(t)
+	defer server.Terminate(t)
+	defer storage.Store.DestroyFunc()
+	expected := []string{"vwc"}
+	registrytest.AssertShortNames(t, storage, expected)
+}