diff --git a/staging/src/k8s.io/apiextensions-apiserver/test/integration/validation_test.go b/staging/src/k8s.io/apiextensions-apiserver/test/integration/validation_test.go
index a25f9f3b813..38b41ffb6db 100644
--- a/staging/src/k8s.io/apiextensions-apiserver/test/integration/validation_test.go
+++ b/staging/src/k8s.io/apiextensions-apiserver/test/integration/validation_test.go
@@ -27,6 +27,7 @@ import (
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/apis/meta/v1/unstructured"
 	"k8s.io/apimachinery/pkg/runtime/schema"
+	"k8s.io/apimachinery/pkg/types"
 	"k8s.io/apimachinery/pkg/util/wait"
 	"k8s.io/apimachinery/pkg/util/yaml"
 
@@ -780,21 +781,25 @@ spec:
 	if v := "spec.versions[0].schema.openAPIV3Schema.properties[a].type: Required value: must not be empty for specified object fields"; !strings.Contains(cond.Message, v) {
 		t.Fatalf("expected violation %q, but got: %v", v, cond.Message)
 	}
+	if v := "spec.preserveUnknownFields: Invalid value: true: must be false"; !strings.Contains(cond.Message, v) {
+		t.Fatalf("expected violation %q, but got: %v", v, cond.Message)
+	}
 
 	// remove schema
 	t.Log("Remove schema")
 	for retry := 0; retry < 5; retry++ {
-		crd, err = apiExtensionClient.ApiextensionsV1beta1().CustomResourceDefinitions().Get(context.TODO(), name, metav1.GetOptions{})
-		if err != nil {
-			t.Fatalf("unexpected get error: %v", err)
-		}
-		crd.Spec.Validation = nil
-		if _, err = apiExtensionClient.ApiextensionsV1beta1().CustomResourceDefinitions().Update(context.TODO(), crd, metav1.UpdateOptions{}); apierrors.IsConflict(err) {
+		// This patch fixes two fields to resolve
+		// 1. property type validation error
+		// 2. preserveUnknownFields validation error
+		patch := []byte("[{\"op\":\"add\",\"path\":\"/spec/validation/openAPIV3Schema/properties/a/type\",\"value\":\"int\"}," +
+			"{\"op\":\"replace\",\"path\":\"/spec/preserveUnknownFields\",\"value\":false}]")
+		if _, err = apiExtensionClient.ApiextensionsV1beta1().CustomResourceDefinitions().Patch(context.TODO(), name, types.JSONPatchType, patch, metav1.PatchOptions{}); apierrors.IsConflict(err) {
 			continue
 		}
 		if err != nil {
 			t.Fatalf("unexpected update error: %v", err)
 		}
+		break
 	}
 	if err != nil {
 		t.Fatalf("unexpected update error: %v", err)
@@ -821,6 +826,7 @@ spec:
 		if err != nil {
 			t.Fatalf("unexpected get error: %v", err)
 		}
+		crd.Spec.PreserveUnknownFields = nil
 		crd.Spec.Validation = &apiextensionsv1beta1.CustomResourceValidation{OpenAPIV3Schema: origSchema}
 		if _, err = apiExtensionClient.ApiextensionsV1beta1().CustomResourceDefinitions().Update(context.TODO(), crd, metav1.UpdateOptions{}); apierrors.IsConflict(err) {
 			continue
@@ -828,6 +834,7 @@ spec:
 		if err != nil {
 			t.Fatalf("unexpected update error: %v", err)
 		}
+		break
 	}
 	if err != nil {
 		t.Fatalf("unexpected update error: %v", err)
@@ -849,6 +856,9 @@ spec:
 	if v := "spec.versions[0].schema.openAPIV3Schema.properties[a].type: Required value: must not be empty for specified object fields"; !strings.Contains(cond.Message, v) {
 		t.Fatalf("expected violation %q, but got: %v", v, cond.Message)
 	}
+	if v := "spec.preserveUnknownFields: Invalid value: true: must be false"; !strings.Contains(cond.Message, v) {
+		t.Fatalf("expected violation %q, but got: %v", v, cond.Message)
+	}
 }
 
 func TestNonStructuralSchemaCondition(t *testing.T) {
@@ -862,6 +872,7 @@ func TestNonStructuralSchemaCondition(t *testing.T) {
 apiVersion: apiextensions.k8s.io/v1beta1
 kind: CustomResourceDefinition
 spec:
+  preserveUnknownFields: PRESERVE_UNKNOWN_FIELDS
   version: v1beta1
   names:
     plural: foos
@@ -882,6 +893,7 @@ spec:
 
 	type Test struct {
 		desc                                  string
+		preserveUnknownFields                 string
 		globalSchema, v1Schema, v1beta1Schema string
 		expectedCreateErrors                  []string
 		unexpectedCreateErrors                []string
@@ -889,7 +901,19 @@ spec:
 		unexpectedViolations                  []string
 	}
 	tests := []Test{
-		{"empty", "", "", "", nil, nil, nil, nil},
+		{
+			desc: "empty",
+			expectedViolations: []string{
+				"spec.preserveUnknownFields: Invalid value: true: must be false",
+			},
+		},
+		{
+			desc:                  "preserve unknown fields is false",
+			preserveUnknownFields: "false",
+			globalSchema: `
+type: object
+`,
+		},
 		{
 			desc: "int-or-string and preserve-unknown-fields true",
 			globalSchema: `
@@ -922,7 +946,8 @@ x-kubernetes-embedded-resource: true
 			},
 		},
 		{
-			desc: "embedded-resource without preserve-unknown-fields, but properties",
+			desc:                  "embedded-resource without preserve-unknown-fields, but properties",
+			preserveUnknownFields: "false",
 			globalSchema: `
 type: object
 x-kubernetes-embedded-resource: true
@@ -934,16 +959,15 @@ properties:
  metadata:
    type: object
 `,
-			expectedViolations: []string{},
 		},
 		{
-			desc: "embedded-resource with preserve-unknown-fields",
+			desc:                  "embedded-resource with preserve-unknown-fields",
+			preserveUnknownFields: "false",
 			globalSchema: `
 type: object
 x-kubernetes-embedded-resource: true
 x-kubernetes-preserve-unknown-fields: true
 `,
-			expectedViolations: []string{},
 		},
 		{
 			desc: "embedded-resource with wrong type",
@@ -1330,7 +1354,8 @@ oneOf:
 			},
 		},
 		{
-			desc: "structural complete",
+			desc:                  "structural complete",
+			preserveUnknownFields: "false",
 			globalSchema: `
 type: object
 properties:
@@ -1391,7 +1416,6 @@ oneOf:
 - properties:
    g: {}
 `,
-			expectedViolations: nil,
 		},
 		{
 			desc: "invalid v1beta1 schema",
@@ -1472,7 +1496,8 @@ properties:
 			},
 		},
 		{
-			desc: "metadata with name property",
+			desc:                  "metadata with name property",
+			preserveUnknownFields: "false",
 			globalSchema: `
 type: object
 properties:
@@ -1483,10 +1508,10 @@ properties:
        type: string
        pattern: "^[a-z]+$"
 `,
-			expectedViolations: []string{},
 		},
 		{
-			desc: "metadata with generateName property",
+			desc:                  "metadata with generateName property",
+			preserveUnknownFields: "false",
 			globalSchema: `
 type: object
 properties:
@@ -1497,10 +1522,10 @@ properties:
        type: string
        pattern: "^[a-z]+$"
 `,
-			expectedViolations: []string{},
 		},
 		{
-			desc: "metadata with name and generateName property",
+			desc:                  "metadata with name and generateName property",
+			preserveUnknownFields: "false",
 			globalSchema: `
 type: object
 properties:
@@ -1514,7 +1539,6 @@ properties:
        type: string
        pattern: "^[a-z]+$"
 `,
-			expectedViolations: []string{},
 		},
 		{
 			desc: "metadata under junctors",
@@ -1597,6 +1621,7 @@ properties:
 				"GLOBAL_SCHEMA", toValidationJSON(tst.globalSchema),
 				"V1BETA1_SCHEMA", toValidationJSON(tst.v1beta1Schema),
 				"V1_SCHEMA", toValidationJSON(tst.v1Schema),
+				"PRESERVE_UNKNOWN_FIELDS", tst.preserveUnknownFields,
 			).Replace(tmpl)
 
 			// decode CRD manifest