diff --git a/staging/src/k8s.io/api/testdata/v1.26.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.json b/staging/src/k8s.io/api/testdata/v1.26.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.json
new file mode 100644
index 00000000000..41d542a9bbd
--- /dev/null
+++ b/staging/src/k8s.io/api/testdata/v1.26.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.json
@@ -0,0 +1,163 @@
+{
+  "kind": "NetworkPolicy",
+  "apiVersion": "extensions/v1beta1",
+  "metadata": {
+    "name": "nameValue",
+    "generateName": "generateNameValue",
+    "namespace": "namespaceValue",
+    "selfLink": "selfLinkValue",
+    "uid": "uidValue",
+    "resourceVersion": "resourceVersionValue",
+    "generation": 7,
+    "creationTimestamp": "2008-01-01T01:01:01Z",
+    "deletionTimestamp": "2009-01-01T01:01:01Z",
+    "deletionGracePeriodSeconds": 10,
+    "labels": {
+      "labelsKey": "labelsValue"
+    },
+    "annotations": {
+      "annotationsKey": "annotationsValue"
+    },
+    "ownerReferences": [
+      {
+        "apiVersion": "apiVersionValue",
+        "kind": "kindValue",
+        "name": "nameValue",
+        "uid": "uidValue",
+        "controller": true,
+        "blockOwnerDeletion": true
+      }
+    ],
+    "finalizers": [
+      "finalizersValue"
+    ],
+    "managedFields": [
+      {
+        "manager": "managerValue",
+        "operation": "operationValue",
+        "apiVersion": "apiVersionValue",
+        "time": "2004-01-01T01:01:01Z",
+        "fieldsType": "fieldsTypeValue",
+        "fieldsV1": {},
+        "subresource": "subresourceValue"
+      }
+    ]
+  },
+  "spec": {
+    "podSelector": {
+      "matchLabels": {
+        "matchLabelsKey": "matchLabelsValue"
+      },
+      "matchExpressions": [
+        {
+          "key": "keyValue",
+          "operator": "operatorValue",
+          "values": [
+            "valuesValue"
+          ]
+        }
+      ]
+    },
+    "ingress": [
+      {
+        "ports": [
+          {
+            "protocol": "protocolValue",
+            "port": "portValue",
+            "endPort": 3
+          }
+        ],
+        "from": [
+          {
+            "podSelector": {
+              "matchLabels": {
+                "matchLabelsKey": "matchLabelsValue"
+              },
+              "matchExpressions": [
+                {
+                  "key": "keyValue",
+                  "operator": "operatorValue",
+                  "values": [
+                    "valuesValue"
+                  ]
+                }
+              ]
+            },
+            "namespaceSelector": {
+              "matchLabels": {
+                "matchLabelsKey": "matchLabelsValue"
+              },
+              "matchExpressions": [
+                {
+                  "key": "keyValue",
+                  "operator": "operatorValue",
+                  "values": [
+                    "valuesValue"
+                  ]
+                }
+              ]
+            },
+            "ipBlock": {
+              "cidr": "cidrValue",
+              "except": [
+                "exceptValue"
+              ]
+            }
+          }
+        ]
+      }
+    ],
+    "egress": [
+      {
+        "ports": [
+          {
+            "protocol": "protocolValue",
+            "port": "portValue",
+            "endPort": 3
+          }
+        ],
+        "to": [
+          {
+            "podSelector": {
+              "matchLabels": {
+                "matchLabelsKey": "matchLabelsValue"
+              },
+              "matchExpressions": [
+                {
+                  "key": "keyValue",
+                  "operator": "operatorValue",
+                  "values": [
+                    "valuesValue"
+                  ]
+                }
+              ]
+            },
+            "namespaceSelector": {
+              "matchLabels": {
+                "matchLabelsKey": "matchLabelsValue"
+              },
+              "matchExpressions": [
+                {
+                  "key": "keyValue",
+                  "operator": "operatorValue",
+                  "values": [
+                    "valuesValue"
+                  ]
+                }
+              ]
+            },
+            "ipBlock": {
+              "cidr": "cidrValue",
+              "except": [
+                "exceptValue"
+              ]
+            }
+          }
+        ]
+      }
+    ],
+    "policyTypes": [
+      "policyTypesValue"
+    ]
+  }
+}
\ No newline at end of file
diff --git a/staging/src/k8s.io/api/testdata/v1.26.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.pb b/staging/src/k8s.io/api/testdata/v1.26.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.pb
new file mode 100644
index 00000000000..4c7ce5ac9cb
Binary files /dev/null and b/staging/src/k8s.io/api/testdata/v1.26.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.pb differ
diff --git a/staging/src/k8s.io/api/testdata/v1.26.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.yaml b/staging/src/k8s.io/api/testdata/v1.26.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.yaml
new file mode 100644
index 00000000000..176cbe3313c
--- /dev/null
+++ b/staging/src/k8s.io/api/testdata/v1.26.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.yaml
@@ -0,0 +1,97 @@
+apiVersion: extensions/v1beta1
+kind: NetworkPolicy
+metadata:
+  annotations:
+    annotationsKey: annotationsValue
+  creationTimestamp: "2008-01-01T01:01:01Z"
+  deletionGracePeriodSeconds: 10
+  deletionTimestamp: "2009-01-01T01:01:01Z"
+  finalizers:
+  - finalizersValue
+  generateName: generateNameValue
+  generation: 7
+  labels:
+    labelsKey: labelsValue
+  managedFields:
+  - apiVersion: apiVersionValue
+    fieldsType: fieldsTypeValue
+    fieldsV1: {}
+    manager: managerValue
+    operation: operationValue
+    subresource: subresourceValue
+    time: "2004-01-01T01:01:01Z"
+  name: nameValue
+  namespace: namespaceValue
+  ownerReferences:
+  - apiVersion: apiVersionValue
+    blockOwnerDeletion: true
+    controller: true
+    kind: kindValue
+    name: nameValue
+    uid: uidValue
+  resourceVersion: resourceVersionValue
+  selfLink: selfLinkValue
+  uid: uidValue
+spec:
+  egress:
+  - ports:
+    - endPort: 3
+      port: portValue
+      protocol: protocolValue
+    to:
+    - ipBlock:
+        cidr: cidrValue
+        except:
+        - exceptValue
+      namespaceSelector:
+        matchExpressions:
+        - key: keyValue
+          operator: operatorValue
+          values:
+          - valuesValue
+        matchLabels:
+          matchLabelsKey: matchLabelsValue
+      podSelector:
+        matchExpressions:
+        - key: keyValue
+          operator: operatorValue
+          values:
+          - valuesValue
+        matchLabels:
+          matchLabelsKey: matchLabelsValue
+  ingress:
+  - from:
+    - ipBlock:
+        cidr: cidrValue
+        except:
+        - exceptValue
+      namespaceSelector:
+        matchExpressions:
+        - key: keyValue
+          operator: operatorValue
+          values:
+          - valuesValue
+        matchLabels:
+          matchLabelsKey: matchLabelsValue
+      podSelector:
+        matchExpressions:
+        - key: keyValue
+          operator: operatorValue
+          values:
+          - valuesValue
+        matchLabels:
+          matchLabelsKey: matchLabelsValue
+    ports:
+    - endPort: 3
+      port: portValue
+      protocol: protocolValue
+  podSelector:
+    matchExpressions:
+    - key: keyValue
+      operator: operatorValue
+      values:
+      - valuesValue
+    matchLabels:
+      matchLabelsKey: matchLabelsValue
+  policyTypes:
+  - policyTypesValue
diff --git a/staging/src/k8s.io/api/testdata/v1.26.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.json b/staging/src/k8s.io/api/testdata/v1.26.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.json
new file mode 100644
index 00000000000..e61daad40ed
--- /dev/null
+++ b/staging/src/k8s.io/api/testdata/v1.26.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.json
@@ -0,0 +1,163 @@
+{
+  "kind": "NetworkPolicy",
+  "apiVersion": "networking.k8s.io/v1",
+  "metadata": {
+    "name": "nameValue",
+    "generateName": "generateNameValue",
+    "namespace": "namespaceValue",
+    "selfLink": "selfLinkValue",
+    "uid": "uidValue",
+    "resourceVersion": "resourceVersionValue",
+    "generation": 7,
+    "creationTimestamp": "2008-01-01T01:01:01Z",
+    "deletionTimestamp": "2009-01-01T01:01:01Z",
+    "deletionGracePeriodSeconds": 10,
+    "labels": {
+      "labelsKey": "labelsValue"
+    },
+    "annotations": {
+      "annotationsKey": "annotationsValue"
+    },
+    "ownerReferences": [
+      {
+        "apiVersion": "apiVersionValue",
+        "kind": "kindValue",
+        "name": "nameValue",
+        "uid": "uidValue",
+        "controller": true,
+        "blockOwnerDeletion": true
+      }
+    ],
+    "finalizers": [
+      "finalizersValue"
+    ],
+    "managedFields": [
+      {
+        "manager": "managerValue",
+        "operation": "operationValue",
+        "apiVersion": "apiVersionValue",
+        "time": "2004-01-01T01:01:01Z",
+        "fieldsType": "fieldsTypeValue",
+        "fieldsV1": {},
+        "subresource": "subresourceValue"
+      }
+    ]
+  },
+  "spec": {
+    "podSelector": {
+      "matchLabels": {
+        "matchLabelsKey": "matchLabelsValue"
+      },
+      "matchExpressions": [
+        {
+          "key": "keyValue",
+          "operator": "operatorValue",
+          "values": [
+            "valuesValue"
+          ]
+        }
+      ]
+    },
+    "ingress": [
+      {
+        "ports": [
+          {
+            "protocol": "protocolValue",
+            "port": "portValue",
+            "endPort": 3
+          }
+        ],
+        "from": [
+          {
+            "podSelector": {
+              "matchLabels": {
+                "matchLabelsKey": "matchLabelsValue"
+              },
+              "matchExpressions": [
+                {
+                  "key": "keyValue",
+                  "operator": "operatorValue",
+                  "values": [
+                    "valuesValue"
+                  ]
+                }
+              ]
+            },
+            "namespaceSelector": {
+              "matchLabels": {
+                "matchLabelsKey": "matchLabelsValue"
+              },
+              "matchExpressions": [
+                {
+                  "key": "keyValue",
+                  "operator": "operatorValue",
+                  "values": [
+                    "valuesValue"
+                  ]
+                }
+              ]
+            },
+            "ipBlock": {
+              "cidr": "cidrValue",
+              "except": [
+                "exceptValue"
+              ]
+            }
+          }
+        ]
+      }
+    ],
+    "egress": [
+      {
+        "ports": [
+          {
+            "protocol": "protocolValue",
+            "port": "portValue",
+            "endPort": 3
+          }
+        ],
+        "to": [
+          {
+            "podSelector": {
+              "matchLabels": {
+                "matchLabelsKey": "matchLabelsValue"
+              },
+              "matchExpressions": [
+                {
+                  "key": "keyValue",
+                  "operator": "operatorValue",
+                  "values": [
+                    "valuesValue"
+                  ]
+                }
+              ]
+            },
+            "namespaceSelector": {
+              "matchLabels": {
+                "matchLabelsKey": "matchLabelsValue"
+              },
+              "matchExpressions": [
+                {
+                  "key": "keyValue",
+                  "operator": "operatorValue",
+                  "values": [
+                    "valuesValue"
+                  ]
+                }
+              ]
+            },
+            "ipBlock": {
+              "cidr": "cidrValue",
+              "except": [
+                "exceptValue"
+              ]
+            }
+          }
+        ]
+      }
+    ],
+    "policyTypes": [
+      "policyTypesValue"
+    ]
+  }
+}
\ No newline at end of file
diff --git a/staging/src/k8s.io/api/testdata/v1.26.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.pb b/staging/src/k8s.io/api/testdata/v1.26.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.pb
new file mode 100644
index 00000000000..90efd44a049
Binary files /dev/null and b/staging/src/k8s.io/api/testdata/v1.26.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.pb differ
diff --git a/staging/src/k8s.io/api/testdata/v1.26.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.yaml b/staging/src/k8s.io/api/testdata/v1.26.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.yaml
new file mode 100644
index 00000000000..09bf9090473
--- /dev/null
+++ b/staging/src/k8s.io/api/testdata/v1.26.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.yaml
@@ -0,0 +1,97 @@
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  annotations:
+    annotationsKey: annotationsValue
+  creationTimestamp: "2008-01-01T01:01:01Z"
+  deletionGracePeriodSeconds: 10
+  deletionTimestamp: "2009-01-01T01:01:01Z"
+  finalizers:
+  - finalizersValue
+  generateName: generateNameValue
+  generation: 7
+  labels:
+    labelsKey: labelsValue
+  managedFields:
+  - apiVersion: apiVersionValue
+    fieldsType: fieldsTypeValue
+    fieldsV1: {}
+    manager: managerValue
+    operation: operationValue
+    subresource: subresourceValue
+    time: "2004-01-01T01:01:01Z"
+  name: nameValue
+  namespace: namespaceValue
+  ownerReferences:
+  - apiVersion: apiVersionValue
+    blockOwnerDeletion: true
+    controller: true
+    kind: kindValue
+    name: nameValue
+    uid: uidValue
+  resourceVersion: resourceVersionValue
+  selfLink: selfLinkValue
+  uid: uidValue
+spec:
+  egress:
+  - ports:
+    - endPort: 3
+      port: portValue
+      protocol: protocolValue
+    to:
+    - ipBlock:
+        cidr: cidrValue
+        except:
+        - exceptValue
+      namespaceSelector:
+        matchExpressions:
+        - key: keyValue
+          operator: operatorValue
+          values:
+          - valuesValue
+        matchLabels:
+          matchLabelsKey: matchLabelsValue
+      podSelector:
+        matchExpressions:
+        - key: keyValue
+          operator: operatorValue
+          values:
+          - valuesValue
+        matchLabels:
+          matchLabelsKey: matchLabelsValue
+  ingress:
+  - from:
+    - ipBlock:
+        cidr: cidrValue
+        except:
+        - exceptValue
+      namespaceSelector:
+        matchExpressions:
+        - key: keyValue
+          operator: operatorValue
+          values:
+          - valuesValue
+        matchLabels:
+          matchLabelsKey: matchLabelsValue
+      podSelector:
+        matchExpressions:
+        - key: keyValue
+          operator: operatorValue
+          values:
+          - valuesValue
+        matchLabels:
+          matchLabelsKey: matchLabelsValue
+    ports:
+    - endPort: 3
+      port: portValue
+      protocol: protocolValue
+  podSelector:
+    matchExpressions:
+    - key: keyValue
+      operator: operatorValue
+      values:
+      - valuesValue
+    matchLabels:
+      matchLabelsKey: matchLabelsValue
+  policyTypes:
+  - policyTypesValue
diff --git a/staging/src/k8s.io/api/testdata/v1.27.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.json b/staging/src/k8s.io/api/testdata/v1.27.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.json
new file mode 100644
index 00000000000..41d542a9bbd
--- /dev/null
+++ b/staging/src/k8s.io/api/testdata/v1.27.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.json
@@ -0,0 +1,163 @@
+{
+  "kind": "NetworkPolicy",
+  "apiVersion": "extensions/v1beta1",
+  "metadata": {
+    "name": "nameValue",
+    "generateName": "generateNameValue",
+    "namespace": "namespaceValue",
+    "selfLink": "selfLinkValue",
+    "uid": "uidValue",
+    "resourceVersion": "resourceVersionValue",
+    "generation": 7,
+    "creationTimestamp": "2008-01-01T01:01:01Z",
+    "deletionTimestamp": "2009-01-01T01:01:01Z",
+    "deletionGracePeriodSeconds": 10,
+    "labels": {
+      "labelsKey": "labelsValue"
+    },
+    "annotations": {
+      "annotationsKey": "annotationsValue"
+    },
+    "ownerReferences": [
+      {
+        "apiVersion": "apiVersionValue",
+        "kind": "kindValue",
+        "name": "nameValue",
+        "uid": "uidValue",
+        "controller": true,
+        "blockOwnerDeletion": true
+      }
+    ],
+    "finalizers": [
+      "finalizersValue"
+    ],
+    "managedFields": [
+      {
+        "manager": "managerValue",
+        "operation": "operationValue",
+        "apiVersion": "apiVersionValue",
+        "time": "2004-01-01T01:01:01Z",
+        "fieldsType": "fieldsTypeValue",
+        "fieldsV1": {},
+        "subresource": "subresourceValue"
+      }
+    ]
+  },
+  "spec": {
+    "podSelector": {
+      "matchLabels": {
+        "matchLabelsKey": "matchLabelsValue"
+      },
+      "matchExpressions": [
+        {
+          "key": "keyValue",
+          "operator": "operatorValue",
+          "values": [
+            "valuesValue"
+          ]
+        }
+      ]
+    },
+    "ingress": [
+      {
+        "ports": [
+          {
+            "protocol": "protocolValue",
+            "port": "portValue",
+            "endPort": 3
+          }
+        ],
+        "from": [
+          {
+            "podSelector": {
+              "matchLabels": {
+                "matchLabelsKey": "matchLabelsValue"
+              },
+              "matchExpressions": [
+                {
+                  "key": "keyValue",
+                  "operator": "operatorValue",
+                  "values": [
+                    "valuesValue"
+                  ]
+                }
+              ]
+            },
+            "namespaceSelector": {
+              "matchLabels": {
+                "matchLabelsKey": "matchLabelsValue"
+              },
+              "matchExpressions": [
+                {
+                  "key": "keyValue",
+                  "operator": "operatorValue",
+                  "values": [
+                    "valuesValue"
+                  ]
+                }
+              ]
+            },
+            "ipBlock": {
+              "cidr": "cidrValue",
+              "except": [
+                "exceptValue"
+              ]
+            }
+          }
+        ]
+      }
+    ],
+    "egress": [
+      {
+        "ports": [
+          {
+            "protocol": "protocolValue",
+            "port": "portValue",
+            "endPort": 3
+          }
+        ],
+        "to": [
+          {
+            "podSelector": {
+              "matchLabels": {
+                "matchLabelsKey": "matchLabelsValue"
+              },
+              "matchExpressions": [
+                {
+                  "key": "keyValue",
+                  "operator": "operatorValue",
+                  "values": [
+                    "valuesValue"
+                  ]
+                }
+              ]
+            },
+            "namespaceSelector": {
+              "matchLabels": {
+                "matchLabelsKey": "matchLabelsValue"
+              },
+              "matchExpressions": [
+                {
+                  "key": "keyValue",
+                  "operator": "operatorValue",
+                  "values": [
+                    "valuesValue"
+                  ]
+                }
+              ]
+            },
+            "ipBlock": {
+              "cidr": "cidrValue",
+              "except": [
+                "exceptValue"
+              ]
+            }
+          }
+        ]
+      }
+    ],
+    "policyTypes": [
+      "policyTypesValue"
+    ]
+  }
+}
\ No newline at end of file
diff --git a/staging/src/k8s.io/api/testdata/v1.27.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.pb b/staging/src/k8s.io/api/testdata/v1.27.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.pb
new file mode 100644
index 00000000000..4c7ce5ac9cb
Binary files /dev/null and b/staging/src/k8s.io/api/testdata/v1.27.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.pb differ
diff --git a/staging/src/k8s.io/api/testdata/v1.27.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.yaml b/staging/src/k8s.io/api/testdata/v1.27.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.yaml
new file mode 100644
index 00000000000..176cbe3313c
--- /dev/null
+++ b/staging/src/k8s.io/api/testdata/v1.27.0/extensions.v1beta1.NetworkPolicy.after_roundtrip.yaml
@@ -0,0 +1,97 @@
+apiVersion: extensions/v1beta1
+kind: NetworkPolicy
+metadata:
+  annotations:
+    annotationsKey: annotationsValue
+  creationTimestamp: "2008-01-01T01:01:01Z"
+  deletionGracePeriodSeconds: 10
+  deletionTimestamp: "2009-01-01T01:01:01Z"
+  finalizers:
+  - finalizersValue
+  generateName: generateNameValue
+  generation: 7
+  labels:
+    labelsKey: labelsValue
+  managedFields:
+  - apiVersion: apiVersionValue
+    fieldsType: fieldsTypeValue
+    fieldsV1: {}
+    manager: managerValue
+    operation: operationValue
+    subresource: subresourceValue
+    time: "2004-01-01T01:01:01Z"
+  name: nameValue
+  namespace: namespaceValue
+  ownerReferences:
+  - apiVersion: apiVersionValue
+    blockOwnerDeletion: true
+    controller: true
+    kind: kindValue
+    name: nameValue
+    uid: uidValue
+  resourceVersion: resourceVersionValue
+  selfLink: selfLinkValue
+  uid: uidValue
+spec:
+  egress:
+  - ports:
+    - endPort: 3
+      port: portValue
+      protocol: protocolValue
+    to:
+    - ipBlock:
+        cidr: cidrValue
+        except:
+        - exceptValue
+      namespaceSelector:
+        matchExpressions:
+        - key: keyValue
+          operator: operatorValue
+          values:
+          - valuesValue
+        matchLabels:
+          matchLabelsKey: matchLabelsValue
+      podSelector:
+        matchExpressions:
+        - key: keyValue
+          operator: operatorValue
+          values:
+          - valuesValue
+        matchLabels:
+          matchLabelsKey: matchLabelsValue
+  ingress:
+  - from:
+    - ipBlock:
+        cidr: cidrValue
+        except:
+        - exceptValue
+      namespaceSelector:
+        matchExpressions:
+        - key: keyValue
+          operator: operatorValue
+          values:
+          - valuesValue
+        matchLabels:
+          matchLabelsKey: matchLabelsValue
+      podSelector:
+        matchExpressions:
+        - key: keyValue
+          operator: operatorValue
+          values:
+          - valuesValue
+        matchLabels:
+          matchLabelsKey: matchLabelsValue
+    ports:
+    - endPort: 3
+      port: portValue
+      protocol: protocolValue
+  podSelector:
+    matchExpressions:
+    - key: keyValue
+      operator: operatorValue
+      values:
+      - valuesValue
+    matchLabels:
+      matchLabelsKey: matchLabelsValue
+  policyTypes:
+  - policyTypesValue
diff --git a/staging/src/k8s.io/api/testdata/v1.27.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.json b/staging/src/k8s.io/api/testdata/v1.27.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.json
new file mode 100644
index 00000000000..e61daad40ed
--- /dev/null
+++ b/staging/src/k8s.io/api/testdata/v1.27.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.json
@@ -0,0 +1,163 @@
+{
+  "kind": "NetworkPolicy",
+  "apiVersion": "networking.k8s.io/v1",
+  "metadata": {
+    "name": "nameValue",
+    "generateName": "generateNameValue",
+    "namespace": "namespaceValue",
+    "selfLink": "selfLinkValue",
+    "uid": "uidValue",
+    "resourceVersion": "resourceVersionValue",
+    "generation": 7,
+    "creationTimestamp": "2008-01-01T01:01:01Z",
+    "deletionTimestamp": "2009-01-01T01:01:01Z",
+    "deletionGracePeriodSeconds": 10,
+    "labels": {
+      "labelsKey": "labelsValue"
+    },
+    "annotations": {
+      "annotationsKey": "annotationsValue"
+    },
+    "ownerReferences": [
+      {
+        "apiVersion": "apiVersionValue",
+        "kind": "kindValue",
+        "name": "nameValue",
+        "uid": "uidValue",
+        "controller": true,
+        "blockOwnerDeletion": true
+      }
+    ],
+    "finalizers": [
+      "finalizersValue"
+    ],
+    "managedFields": [
+      {
+        "manager": "managerValue",
+        "operation": "operationValue",
+        "apiVersion": "apiVersionValue",
+        "time": "2004-01-01T01:01:01Z",
+        "fieldsType": "fieldsTypeValue",
+        "fieldsV1": {},
+        "subresource": "subresourceValue"
+      }
+    ]
+  },
+  "spec": {
+    "podSelector": {
+      "matchLabels": {
+        "matchLabelsKey": "matchLabelsValue"
+      },
+      "matchExpressions": [
+        {
+          "key": "keyValue",
+          "operator": "operatorValue",
+          "values": [
+            "valuesValue"
+          ]
+        }
+      ]
+    },
+    "ingress": [
+      {
+        "ports": [
+          {
+            "protocol": "protocolValue",
+            "port": "portValue",
+            "endPort": 3
+          }
+        ],
+        "from": [
+          {
+            "podSelector": {
+              "matchLabels": {
+                "matchLabelsKey": "matchLabelsValue"
+              },
+              "matchExpressions": [
+                {
+                  "key": "keyValue",
+                  "operator": "operatorValue",
+                  "values": [
+                    "valuesValue"
+                  ]
+                }
+              ]
+            },
+            "namespaceSelector": {
+              "matchLabels": {
+                "matchLabelsKey": "matchLabelsValue"
+              },
+              "matchExpressions": [
+                {
+                  "key": "keyValue",
+                  "operator": "operatorValue",
+                  "values": [
+                    "valuesValue"
+                  ]
+                }
+              ]
+            },
+            "ipBlock": {
+              "cidr": "cidrValue",
+              "except": [
+                "exceptValue"
+              ]
+            }
+          }
+        ]
+      }
+    ],
+    "egress": [
+      {
+        "ports": [
+          {
+            "protocol": "protocolValue",
+            "port": "portValue",
+            "endPort": 3
+          }
+        ],
+        "to": [
+          {
+            "podSelector": {
+              "matchLabels": {
+                "matchLabelsKey": "matchLabelsValue"
+              },
+              "matchExpressions": [
+                {
+                  "key": "keyValue",
+                  "operator": "operatorValue",
+                  "values": [
+                    "valuesValue"
+                  ]
+                }
+              ]
+            },
+            "namespaceSelector": {
+              "matchLabels": {
+                "matchLabelsKey": "matchLabelsValue"
+              },
+              "matchExpressions": [
+                {
+                  "key": "keyValue",
+                  "operator": "operatorValue",
+                  "values": [
+                    "valuesValue"
+                  ]
+                }
+              ]
+            },
+            "ipBlock": {
+              "cidr": "cidrValue",
+              "except": [
+                "exceptValue"
+              ]
+            }
+          }
+        ]
+      }
+    ],
+    "policyTypes": [
+      "policyTypesValue"
+    ]
+  }
+}
\ No newline at end of file
diff --git a/staging/src/k8s.io/api/testdata/v1.27.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.pb b/staging/src/k8s.io/api/testdata/v1.27.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.pb
new file mode 100644
index 00000000000..90efd44a049
Binary files /dev/null and b/staging/src/k8s.io/api/testdata/v1.27.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.pb differ
diff --git a/staging/src/k8s.io/api/testdata/v1.27.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.yaml b/staging/src/k8s.io/api/testdata/v1.27.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.yaml
new file mode 100644
index 00000000000..09bf9090473
--- /dev/null
+++ b/staging/src/k8s.io/api/testdata/v1.27.0/networking.k8s.io.v1.NetworkPolicy.after_roundtrip.yaml
@@ -0,0 +1,97 @@
+apiVersion: networking.k8s.io/v1
+kind: NetworkPolicy
+metadata:
+  annotations:
+    annotationsKey: annotationsValue
+  creationTimestamp: "2008-01-01T01:01:01Z"
+  deletionGracePeriodSeconds: 10
+  deletionTimestamp: "2009-01-01T01:01:01Z"
+  finalizers:
+  - finalizersValue
+  generateName: generateNameValue
+  generation: 7
+  labels:
+    labelsKey: labelsValue
+  managedFields:
+  - apiVersion: apiVersionValue
+    fieldsType: fieldsTypeValue
+    fieldsV1: {}
+    manager: managerValue
+    operation: operationValue
+    subresource: subresourceValue
+    time: "2004-01-01T01:01:01Z"
+  name: nameValue
+  namespace: namespaceValue
+  ownerReferences:
+  - apiVersion: apiVersionValue
+    blockOwnerDeletion: true
+    controller: true
+    kind: kindValue
+    name: nameValue
+    uid: uidValue
+  resourceVersion: resourceVersionValue
+  selfLink: selfLinkValue
+  uid: uidValue
+spec:
+  egress:
+  - ports:
+    - endPort: 3
+      port: portValue
+      protocol: protocolValue
+    to:
+    - ipBlock:
+        cidr: cidrValue
+        except:
+        - exceptValue
+      namespaceSelector:
+        matchExpressions:
+        - key: keyValue
+          operator: operatorValue
+          values:
+          - valuesValue
+        matchLabels:
+          matchLabelsKey: matchLabelsValue
+      podSelector:
+        matchExpressions:
+        - key: keyValue
+          operator: operatorValue
+          values:
+          - valuesValue
+        matchLabels:
+          matchLabelsKey: matchLabelsValue
+  ingress:
+  - from:
+    - ipBlock:
+        cidr: cidrValue
+        except:
+        - exceptValue
+      namespaceSelector:
+        matchExpressions:
+        - key: keyValue
+          operator: operatorValue
+          values:
+          - valuesValue
+        matchLabels:
+          matchLabelsKey: matchLabelsValue
+      podSelector:
+        matchExpressions:
+        - key: keyValue
+          operator: operatorValue
+          values:
+          - valuesValue
+        matchLabels:
+          matchLabelsKey: matchLabelsValue
+    ports:
+    - endPort: 3
+      port: portValue
+      protocol: protocolValue
+  podSelector:
+    matchExpressions:
+    - key: keyValue
+      operator: operatorValue
+      values:
+      - valuesValue
+    matchLabels:
+      matchLabelsKey: matchLabelsValue
+  policyTypes:
+  - policyTypesValue