diff --git a/staging/src/k8s.io/api/roundtrip_test.go b/staging/src/k8s.io/api/roundtrip_test.go
index d06fe257255..d4db75daf4d 100644
--- a/staging/src/k8s.io/api/roundtrip_test.go
+++ b/staging/src/k8s.io/api/roundtrip_test.go
@@ -42,7 +42,7 @@ import (
 	coordinationv1 "k8s.io/api/coordination/v1"
 	coordinationv1beta1 "k8s.io/api/coordination/v1beta1"
 	corev1 "k8s.io/api/core/v1"
-	discoveryv1alpha1 "k8s.io/api/discovery/v1alpha1"
+	discoveryv1 "k8s.io/api/discovery/v1"
 	discoveryv1beta1 "k8s.io/api/discovery/v1beta1"
 	eventsv1 "k8s.io/api/events/v1"
 	eventsv1beta1 "k8s.io/api/events/v1beta1"
@@ -97,7 +97,7 @@ var groups = []runtime.SchemeBuilder{
 	coordinationv1.SchemeBuilder,
 	coordinationv1beta1.SchemeBuilder,
 	corev1.SchemeBuilder,
-	discoveryv1alpha1.SchemeBuilder,
+	discoveryv1.SchemeBuilder,
 	discoveryv1beta1.SchemeBuilder,
 	eventsv1.SchemeBuilder,
 	eventsv1beta1.SchemeBuilder,
diff --git a/staging/src/k8s.io/api/testdata/HEAD/discovery.k8s.io.v1.EndpointSlice.json b/staging/src/k8s.io/api/testdata/HEAD/discovery.k8s.io.v1.EndpointSlice.json
new file mode 100644
index 00000000000..fa17b9f3c54
--- /dev/null
+++ b/staging/src/k8s.io/api/testdata/HEAD/discovery.k8s.io.v1.EndpointSlice.json
@@ -0,0 +1,79 @@
+{
+  "kind": "EndpointSlice",
+  "apiVersion": "discovery.k8s.io/v1",
+  "metadata": {
+    "name": "2",
+    "generateName": "3",
+    "namespace": "4",
+    "selfLink": "5",
+    "uid": "7",
+    "resourceVersion": "11042405498087606203",
+    "generation": 8071137005907523419,
+    "creationTimestamp": null,
+    "deletionGracePeriodSeconds": -4955867275792137171,
+    "labels": {
+      "7": "8"
+    },
+    "annotations": {
+      "9": "10"
+    },
+    "ownerReferences": [
+      {
+        "apiVersion": "11",
+        "kind": "12",
+        "name": "13",
+        "uid": "Dz廔ȇ{sŊƏp",
+        "controller": false,
+        "blockOwnerDeletion": true
+      }
+    ],
+    "finalizers": [
+      "14"
+    ],
+    "clusterName": "15",
+    "managedFields": [
+      {
+        "manager": "16",
+        "operation": "鐊唊飙Ş-U圴÷a/ɔ}摁(湗Ć]",
+        "apiVersion": "17",
+        "fieldsType": "18"
+      }
+    ]
+  },
+  "addressType": "īqJ枊a8衍`Ĩɘ.蘯",
+  "endpoints": [
+    {
+      "addresses": [
+        "19"
+      ],
+      "conditions": {
+        "ready": false,
+        "serving": false,
+        "terminating": false
+      },
+      "hostname": "20",
+      "targetRef": {
+        "kind": "21",
+        "namespace": "22",
+        "name": "23",
+        "uid": "ɑ",
+        "apiVersion": "24",
+        "resourceVersion": "25",
+        "fieldPath": "26"
+      },
+      "deprecatedTopology": {
+        "27": "28"
+      },
+      "nodeName": "29",
+      "zone": "30"
+    }
+  ],
+  "ports": [
+    {
+      "name": "31",
+      "protocol": "脽ěĂ凗蓏Ŋ蛊ĉy緅縕",
+      "port": -591435092,
+      "appProtocol": "32"
+    }
+  ]
+}
\ No newline at end of file
diff --git a/staging/src/k8s.io/api/testdata/HEAD/discovery.k8s.io.v1.EndpointSlice.pb b/staging/src/k8s.io/api/testdata/HEAD/discovery.k8s.io.v1.EndpointSlice.pb
new file mode 100644
index 00000000000..9bf7f091e21
Binary files /dev/null and b/staging/src/k8s.io/api/testdata/HEAD/discovery.k8s.io.v1.EndpointSlice.pb differ
diff --git a/staging/src/k8s.io/api/testdata/HEAD/discovery.k8s.io.v1.EndpointSlice.yaml b/staging/src/k8s.io/api/testdata/HEAD/discovery.k8s.io.v1.EndpointSlice.yaml
new file mode 100644
index 00000000000..d84ec7aea72
--- /dev/null
+++ b/staging/src/k8s.io/api/testdata/HEAD/discovery.k8s.io.v1.EndpointSlice.yaml
@@ -0,0 +1,57 @@
+addressType: īqJ枊a8衍`Ĩɘ.蘯
+apiVersion: discovery.k8s.io/v1
+endpoints:
+- addresses:
+  - "19"
+  conditions:
+    ready: false
+    serving: false
+    terminating: false
+  deprecatedTopology:
+    "27": "28"
+  hostname: "20"
+  nodeName: "29"
+  targetRef:
+    apiVersion: "24"
+    fieldPath: "26"
+    kind: "21"
+    name: "23"
+    namespace: "22"
+    resourceVersion: "25"
+    uid: ɑ
+  zone: "30"
+kind: EndpointSlice
+metadata:
+  annotations:
+    "9": "10"
+  clusterName: "15"
+  creationTimestamp: null
+  deletionGracePeriodSeconds: -4955867275792137171
+  finalizers:
+  - "14"
+  generateName: "3"
+  generation: 8071137005907523419
+  labels:
+    "7": "8"
+  managedFields:
+  - apiVersion: "17"
+    fieldsType: "18"
+    manager: "16"
+    operation: 鐊唊飙Ş-U圴÷a/ɔ}摁(湗Ć]
+  name: "2"
+  namespace: "4"
+  ownerReferences:
+  - apiVersion: "11"
+    blockOwnerDeletion: true
+    controller: false
+    kind: "12"
+    name: "13"
+    uid: Dz廔ȇ{sŊƏp
+  resourceVersion: "11042405498087606203"
+  selfLink: "5"
+  uid: "7"
+ports:
+- appProtocol: "32"
+  name: "31"
+  port: -591435092
+  protocol: 脽ěĂ凗蓏Ŋ蛊ĉy緅縕