diff --git a/test/e2e/suite/serving/cainjector.go b/test/e2e/suite/serving/cainjector.go
index 9a14b340e..a9d3b4cd8 100644
--- a/test/e2e/suite/serving/cainjector.go
+++ b/test/e2e/suite/serving/cainjector.go
@@ -18,19 +18,21 @@ package certificate
 
 import (
 	"context"
+	"fmt"
 	"time"
 
 	. "github.com/onsi/ginkgo/v2"
 	. "github.com/onsi/gomega"
-
 	admissionreg "k8s.io/api/admissionregistration/v1"
 	corev1 "k8s.io/api/core/v1"
 	apiext "k8s.io/apiextensions-apiserver/pkg/apis/apiextensions/v1"
 	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
 	"k8s.io/apimachinery/pkg/runtime"
 	"k8s.io/apimachinery/pkg/types"
+	"k8s.io/apimachinery/pkg/util/rand"
 	"k8s.io/client-go/util/retry"
 	apireg "k8s.io/kube-aggregator/pkg/apis/apiregistration/v1"
+	"sigs.k8s.io/controller-runtime/pkg/client"
 
 	certmanager "github.com/cert-manager/cert-manager/pkg/apis/certmanager/v1"
 	v1 "github.com/cert-manager/cert-manager/pkg/apis/certmanager/v1"
@@ -38,7 +40,6 @@ import (
 	"github.com/cert-manager/cert-manager/test/e2e/framework"
 	"github.com/cert-manager/cert-manager/test/e2e/util"
 	"github.com/cert-manager/cert-manager/test/unit/gen"
-	"sigs.k8s.io/controller-runtime/pkg/client"
 )
 
 type injectableTest struct {
@@ -324,9 +325,10 @@ var _ = framework.CertManagerDescribe("CA Injector", func() {
 	injectorContext("validating webhook", &injectableTest{
 		makeInjectable: func(namePrefix string) client.Object {
 			someURL := "https://localhost:8675"
+			name := fmt.Sprintf("%s-hook-%s", namePrefix, rand.String(5))
 			return &admissionreg.ValidatingWebhookConfiguration{
 				ObjectMeta: metav1.ObjectMeta{
-					Name: namePrefix + "-hook",
+					Name: name,
 					Annotations: map[string]string{
 						certmanager.WantInjectAnnotation: types.NamespacedName{Name: "serving-certs", Namespace: f.Namespace.Name}.String(),
 					},
@@ -367,9 +369,10 @@ var _ = framework.CertManagerDescribe("CA Injector", func() {
 	injectorContext("mutating webhook", &injectableTest{
 		makeInjectable: func(namePrefix string) client.Object {
 			someURL := "https://localhost:8675"
+			name := fmt.Sprintf("%s-hook-%s", namePrefix, rand.String(5))
 			return &admissionreg.MutatingWebhookConfiguration{
 				ObjectMeta: metav1.ObjectMeta{
-					Name: namePrefix + "-hook",
+					Name: name,
 					Annotations: map[string]string{
 						certmanager.WantInjectAnnotation: types.NamespacedName{Name: "serving-certs", Namespace: f.Namespace.Name}.String(),
 					},