diff --git a/pkg/apis/core/v1/zz_generated.defaults.go b/pkg/apis/core/v1/zz_generated.defaults.go
index 2863cc3ab8f7..493d9903e1b5 100644
--- a/pkg/apis/core/v1/zz_generated.defaults.go
+++ b/pkg/apis/core/v1/zz_generated.defaults.go
@@ -913,6 +913,12 @@ func SetObjectDefaults_SecretList(in *v1.SecretList) {
 
 func SetObjectDefaults_Service(in *v1.Service) {
 	SetDefaults_Service(in)
+	for i := range in.Spec.Ports {
+		a := &in.Spec.Ports[i]
+		if a.Protocol == "" {
+			a.Protocol = "TCP"
+		}
+	}
 }
 
 func SetObjectDefaults_ServiceList(in *v1.ServiceList) {
diff --git a/staging/src/k8s.io/api/core/v1/generated.proto b/staging/src/k8s.io/api/core/v1/generated.proto
index 386e4bdb461f..742602b2db68 100644
--- a/staging/src/k8s.io/api/core/v1/generated.proto
+++ b/staging/src/k8s.io/api/core/v1/generated.proto
@@ -4751,6 +4751,7 @@ message ServicePort {
 
   // The IP protocol for this port. Supports "TCP", "UDP", and "SCTP".
   // Default is TCP.
+  // +default="TCP"
   // +optional
   optional string protocol = 2;
 
diff --git a/staging/src/k8s.io/api/core/v1/types.go b/staging/src/k8s.io/api/core/v1/types.go
index 6465fc53959c..59feb2d74add 100644
--- a/staging/src/k8s.io/api/core/v1/types.go
+++ b/staging/src/k8s.io/api/core/v1/types.go
@@ -4265,6 +4265,7 @@ type ServicePort struct {
 
 	// The IP protocol for this port. Supports "TCP", "UDP", and "SCTP".
 	// Default is TCP.
+	// +default="TCP"
 	// +optional
 	Protocol Protocol `json:"protocol,omitempty" protobuf:"bytes,2,opt,name=protocol,casttype=Protocol"`
 
diff --git a/staging/src/k8s.io/kube-aggregator/pkg/apiserver/apiserver.go b/staging/src/k8s.io/kube-aggregator/pkg/apiserver/apiserver.go
index d0ab3186a9a5..25027835c0b9 100644
--- a/staging/src/k8s.io/kube-aggregator/pkg/apiserver/apiserver.go
+++ b/staging/src/k8s.io/kube-aggregator/pkg/apiserver/apiserver.go
@@ -163,11 +163,6 @@ func (cfg *Config) Complete() CompletedConfig {
 
 // NewWithDelegate returns a new instance of APIAggregator from the given config.
 func (c completedConfig) NewWithDelegate(delegationTarget genericapiserver.DelegationTarget) (*APIAggregator, error) {
-	// Prevent generic API server to install OpenAPI handler. Aggregator server
-	// has its own customized OpenAPI handler.
-	openAPIConfig := c.GenericConfig.OpenAPIConfig
-	c.GenericConfig.OpenAPIConfig = nil
-
 	genericServer, err := c.GenericConfig.New("kube-aggregator", delegationTarget)
 	if err != nil {
 		return nil, err
@@ -191,7 +186,7 @@ func (c completedConfig) NewWithDelegate(delegationTarget genericapiserver.Deleg
 		lister:                     informerFactory.Apiregistration().V1().APIServices().Lister(),
 		APIRegistrationInformers:   informerFactory,
 		serviceResolver:            c.ExtraConfig.ServiceResolver,
-		openAPIConfig:              openAPIConfig,
+		openAPIConfig:              c.GenericConfig.OpenAPIConfig,
 		egressSelector:             c.GenericConfig.EgressSelector,
 		proxyCurrentCertKeyContent: func() (bytes []byte, bytes2 []byte) { return nil, nil },
 	}
diff --git a/test/integration/apiserver/apply/status_test.go b/test/integration/apiserver/apply/status_test.go
index 32b82735a3b8..864bf0bbf6e4 100644
--- a/test/integration/apiserver/apply/status_test.go
+++ b/test/integration/apiserver/apply/status_test.go
@@ -60,15 +60,7 @@ var statusData = map[schema.GroupVersionResource]string{
 	gvr("internal.apiserver.k8s.io", "v1alpha1", "storageversions"):     `{"status": {"commonEncodingVersion":"v1","storageVersions":[{"apiServerID":"1","decodableVersions":["v1","v2"],"encodingVersion":"v1"}],"conditions":[{"type":"AllEncodingVersionsEqual","status":"True","lastTransitionTime":"2020-01-01T00:00:00Z","reason":"allEncodingVersionsEqual","message":"all encoding versions are set to v1"}]}}`,
 }
 
-const statusDefault = `{"status": {"conditions": [{"type": "MyStatus", "status":"true"}]}}`
-
-// DO NOT ADD TO THIS LIST.
-// This list is used to ignore known bugs. We shouldn't introduce new bugs.
-var ignoreList = map[schema.GroupVersionResource]struct{}{
-	// TODO(#89264): apiservices doesn't work because the openapi is not routed properly.
-	gvr("apiregistration.k8s.io", "v1beta1", "apiservices"): {},
-	gvr("apiregistration.k8s.io", "v1", "apiservices"):      {},
-}
+const statusDefault = `{"status": {"conditions": [{"type": "MyStatus", "status":"True"}]}}`
 
 // Some status-only APIs have empty object on creation. Therefore we don't expect create_test
 // managedFields for these APIs
@@ -146,9 +138,6 @@ func TestApplyStatus(t *testing.T) {
 				t.Fatal(err)
 			}
 			t.Run(mapping.Resource.String(), func(t *testing.T) {
-				if _, ok := ignoreList[mapping.Resource]; ok {
-					t.Skip()
-				}
 				status, ok := statusData[mapping.Resource]
 				if !ok {
 					status = statusDefault
@@ -167,8 +156,17 @@ func TestApplyStatus(t *testing.T) {
 					namespace = ""
 				}
 				name := newObj.GetName()
+
+				// etcd test stub data doesn't contain apiVersion/kind (!), but apply requires it
+				newObj.SetGroupVersionKind(mapping.GroupVersionKind)
+				createData, err := json.Marshal(newObj.Object)
+				if err != nil {
+					t.Fatal(err)
+				}
+
 				rsc := dynamicClient.Resource(mapping.Resource).Namespace(namespace)
-				_, err := rsc.Create(context.TODO(), &newObj, metav1.CreateOptions{FieldManager: "create_test"})
+				// apply to create
+				_, err = rsc.Patch(context.TODO(), name, types.ApplyPatchType, []byte(createData), metav1.PatchOptions{FieldManager: "create_test"})
 				if err != nil {
 					t.Fatal(err)
 				}