diff --git a/staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver/schema/cel/compilation.go b/staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver/schema/cel/compilation.go
index ff931c5f54c..1f61a87fa44 100644
--- a/staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver/schema/cel/compilation.go
+++ b/staging/src/k8s.io/apiextensions-apiserver/pkg/apiserver/schema/cel/compilation.go
@@ -17,6 +17,7 @@ limitations under the License.
 package cel
 
 import (
+	"errors"
 	"fmt"
 	"strings"
 	"time"
@@ -24,7 +25,6 @@ import (
 	"github.com/google/cel-go/cel"
 	"github.com/google/cel-go/checker"
 	"github.com/google/cel-go/common/types"
-	"github.com/pkg/errors"
 
 	apiextensions "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
 	"k8s.io/apiextensions-apiserver/pkg/apiserver/schema"
@@ -127,7 +127,7 @@ func Compile(s *schema.Structural, declType *apiservercel.DeclType, perCallLimit
 		return nil, nil
 	}
 	if declType == nil {
-		return nil, errors.New("Failed to convert to declType for CEL validation rules")
+		return nil, errors.New("failed to convert to declType for CEL validation rules")
 	}
 	celRules := s.XValidations
 
diff --git a/test/integration/apiserver/crd_validation_expressions_test.go b/test/integration/apiserver/crd_validation_expressions_test.go
index 0038c8117e5..faa85449d5b 100644
--- a/test/integration/apiserver/crd_validation_expressions_test.go
+++ b/test/integration/apiserver/crd_validation_expressions_test.go
@@ -718,8 +718,8 @@ func TestCustomResourceValidatorsWithSchemaConversion(t *testing.T) {
 	}
 	oldCR.Object["metadata"].(map[string]interface{})["labels"] = map[string]interface{}{"key": "value"}
 	_, err = crClient.Update(context.TODO(), oldCR, metav1.UpdateOptions{})
-	if err == nil || !strings.Contains(err.Error(), "rule compiler initialization error: Failed to convert to declType for CEL validation rules") {
-		t.Fatalf("expect error to contain \rule compiler initialization error: Failed to convert to declType for CEL validation rules\" but get: %v", err)
+	if err == nil || !strings.Contains(err.Error(), "rule compiler initialization error: failed to convert to declType for CEL validation rules") {
+		t.Fatalf("expect error to contain \rule compiler initialization error: failed to convert to declType for CEL validation rules\" but get: %v", err)
 	}
 	// Create another CR instance with an array and be rejected
 	name2 := names.SimpleNameGenerator.GenerateName("cr-2")