diff --git a/test/openshift/e2e/ginkgo/parallel/1-098_validate_dex_clientsecret_deprecated.go b/test/openshift/e2e/ginkgo/parallel/1-098_validate_dex_clientsecret_deprecated.go
new file mode 100644
index 000000000..2de2bb64c
--- /dev/null
+++ b/test/openshift/e2e/ginkgo/parallel/1-098_validate_dex_clientsecret_deprecated.go
@@ -0,0 +1,154 @@
+/*
+Copyright 2025.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package parallel
+
+import (
+	"context"
+	"fmt"
+	"strings"
+
+	argov1beta1api "github.com/argoproj-labs/argocd-operator/api/v1beta1"
+	. "github.com/onsi/ginkgo/v2"
+	. "github.com/onsi/gomega"
+	"github.com/redhat-developer/gitops-operator/test/openshift/e2e/ginkgo/fixture"
+	argocdFixture "github.com/redhat-developer/gitops-operator/test/openshift/e2e/ginkgo/fixture/argocd"
+	k8sFixture "github.com/redhat-developer/gitops-operator/test/openshift/e2e/ginkgo/fixture/k8s"
+	fixtureUtils "github.com/redhat-developer/gitops-operator/test/openshift/e2e/ginkgo/fixture/utils"
+	corev1 "k8s.io/api/core/v1"
+	metav1 "k8s.io/apimachinery/pkg/apis/meta/v1"
+	"sigs.k8s.io/controller-runtime/pkg/client"
+)
+
+var _ = Describe("GitOps Operator Parallel E2E Tests", func() {
+
+	Context("1-098_validate_dex_clientsecret_deprecated", func() {
+
+		var (
+			k8sClient client.Client
+			ctx       context.Context
+		)
+
+		BeforeEach(func() {
+			fixture.EnsureParallelCleanSlate()
+
+			k8sClient, _ = fixtureUtils.GetE2ETestKubeClient()
+			ctx = context.Background()
+		})
+
+		It("validates that dex client secret is properly copied from service account token to argocd-secret", func() {
+
+			// Create namespace for this test and ensure cleanup
+			namespace, cleanupFunc := fixture.CreateRandomE2ETestNamespaceWithCleanupFunc()
+			defer cleanupFunc()
+
+			By("creating ArgoCD CR with dex SSO enabled using openShiftOAuth")
+			argoCD := &argov1beta1api.ArgoCD{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "example-argocd",
+					Namespace: namespace.Name,
+				},
+				Spec: argov1beta1api.ArgoCDSpec{
+					SSO: &argov1beta1api.ArgoCDSSOSpec{
+						Provider: argov1beta1api.SSOProviderTypeDex,
+						Dex: &argov1beta1api.ArgoCDDexSpec{
+							OpenShiftOAuth: true,
+						},
+					},
+				},
+			}
+			Expect(k8sClient.Create(ctx, argoCD)).To(Succeed())
+
+			By("verifying ArgoCD instance reaches Available phase")
+			Eventually(argoCD, "3m", "5s").Should(argocdFixture.BeAvailable())
+
+			By("verifying dex server service account exists")
+			dexServiceAccount := &corev1.ServiceAccount{
+				ObjectMeta: metav1.ObjectMeta{
+					Name:      "example-argocd-argocd-dex-server",
+					Namespace: namespace.Name,
+				},
+			}
+			Eventually(dexServiceAccount, "2m", "5s").Should(k8sFixture.ExistByName())
+
+			By("validating that the Dex Client Secret was copied from dex serviceaccount token secret to argocd-secret, by the operator")
+			Eventually(func() error {
+				// Get the service account and find its token secret
+				err := k8sClient.Get(ctx, client.ObjectKeyFromObject(dexServiceAccount), dexServiceAccount)
+				if err != nil {
+					return err
+				}
+
+				// Find the token secret from the service account secrets
+				var tokenSecretName string
+				for _, secret := range dexServiceAccount.Secrets {
+					if secret.Name != "" && strings.Contains(secret.Name, "token") {
+						tokenSecretName = secret.Name
+						break
+					}
+				}
+
+				if tokenSecretName == "" {
+					return fmt.Errorf("no token secret found for service account %s", dexServiceAccount.Name)
+				}
+
+				// Get the token secret and extract the token
+				tokenSecret := &corev1.Secret{
+					ObjectMeta: metav1.ObjectMeta{
+						Name:      tokenSecretName,
+						Namespace: namespace.Name,
+					},
+				}
+				err = k8sClient.Get(ctx, client.ObjectKeyFromObject(tokenSecret), tokenSecret)
+				if err != nil {
+					return err
+				}
+
+				expectedClientSecret, exists := tokenSecret.Data["token"]
+				if !exists {
+					return fmt.Errorf("token not found in secret %s", tokenSecretName)
+				}
+
+				// Get the argocd-secret and extract the oidc.dex.clientSecret
+				argoCDSecret := &corev1.Secret{
+					ObjectMeta: metav1.ObjectMeta{
+						Name:      "argocd-secret",
+						Namespace: namespace.Name,
+					},
+				}
+				err = k8sClient.Get(ctx, client.ObjectKeyFromObject(argoCDSecret), argoCDSecret)
+				if err != nil {
+					return err
+				}
+
+				actualClientSecret, exists := argoCDSecret.Data["oidc.dex.clientSecret"]
+				if !exists {
+					return fmt.Errorf("oidc.dex.clientSecret not found in argocd-secret")
+				}
+
+				// Compare the two secrets
+				if string(expectedClientSecret) != string(actualClientSecret) {
+					return fmt.Errorf("dex client secret mismatch: expected length %d, actual length %d",
+						len(expectedClientSecret), len(actualClientSecret))
+				}
+
+				return nil
+			}, "3m", "5s").Should(Succeed())
+
+		})
+
+	})
+})