diff --git a/test/e2e/mnist_pytorch_appwrapper_test.go b/test/e2e/mnist_pytorch_appwrapper_test.go
index 1919c616..99c0e1ae 100644
--- a/test/e2e/mnist_pytorch_appwrapper_test.go
+++ b/test/e2e/mnist_pytorch_appwrapper_test.go
@@ -17,6 +17,8 @@ limitations under the License.
 package e2e
 
 import (
+	"encoding/json"
+	"strings"
 	"testing"
 
 	. "github.com/onsi/gomega"
@@ -145,6 +147,10 @@ func runMnistPyTorchAppWrapper(t *testing.T, accelerator string, numberOfGpus in
 		},
 	}
 
+	raw, _ := json.Marshal(job)
+	// Workaround to remove creationTimestamp which is brought by json marshaller, this field breaks Kueue reconciliation
+	patchedRaw := strings.ReplaceAll(string(raw), `"metadata":{"creationTimestamp":null},`, "")
+
 	// Create an AppWrapper resource
 	aw := &mcadv1beta2.AppWrapper{
 		TypeMeta: metav1.TypeMeta{
@@ -159,7 +165,7 @@ func runMnistPyTorchAppWrapper(t *testing.T, accelerator string, numberOfGpus in
 		Spec: mcadv1beta2.AppWrapperSpec{
 			Components: []mcadv1beta2.AppWrapperComponent{
 				{
-					Template: Raw(test, job),
+					Template: runtime.RawExtension{Raw: []byte(patchedRaw)},
 				},
 			},
 		},
diff --git a/test/e2e/mnist_rayjob_raycluster_test.go b/test/e2e/mnist_rayjob_raycluster_test.go
index c66fb28f..bdd21aef 100644
--- a/test/e2e/mnist_rayjob_raycluster_test.go
+++ b/test/e2e/mnist_rayjob_raycluster_test.go
@@ -18,9 +18,11 @@ package e2e
 
 import (
 	"crypto/tls"
+	"encoding/json"
 	"fmt"
 	"net/http"
 	"net/url"
+	"strings"
 	"testing"
 
 	. "github.com/onsi/gomega"
@@ -135,6 +137,11 @@ func runMnistRayJobRayClusterAppWrapper(t *testing.T, accelerator string, number
 
 	// Create RayCluster, wrap in AppWrapper and assign to localqueue
 	rayCluster := constructRayCluster(test, namespace, mnist, numberOfGpus)
+
+	raw, _ := json.Marshal(rayCluster)
+	// Workaround to remove creationTimestamp which is brought by json marshaller, this field breaks Kueue reconciliation
+	patchedRaw := strings.ReplaceAll(string(raw), `"metadata":{"creationTimestamp":null},`, "")
+
 	aw := &mcadv1beta2.AppWrapper{
 		TypeMeta: metav1.TypeMeta{
 			APIVersion: mcadv1beta2.GroupVersion.String(),
@@ -148,7 +155,7 @@ func runMnistRayJobRayClusterAppWrapper(t *testing.T, accelerator string, number
 		Spec: mcadv1beta2.AppWrapperSpec{
 			Components: []mcadv1beta2.AppWrapperComponent{
 				{
-					Template: Raw(test, rayCluster),
+					Template: runtime.RawExtension{Raw: []byte(patchedRaw)},
 				},
 			},
 		},