diff --git a/.github/workflows/test-e2e-oncluster.yaml b/.github/workflows/test-e2e-oncluster.yaml
index e88a8df94..d19cee724 100644
--- a/.github/workflows/test-e2e-oncluster.yaml
+++ b/.github/workflows/test-e2e-oncluster.yaml
@@ -30,6 +30,7 @@ jobs:
       - name: E2E On Cluster Test
         env:
           E2E_RUNTIMES: ""
+          E2E_REGISTRY_URL: registry.default.svc.cluster.local:5000
           FUNC_REPO_REF: ${{ github.event.pull_request.head.repo.full_name }}
           FUNC_REPO_BRANCH_REF: ${{ github.head_ref }}
         run: make test-e2e-on-cluster
diff --git a/pkg/docker/pusher.go b/pkg/docker/pusher.go
index bdc7b3fbb..2f85e0c30 100644
--- a/pkg/docker/pusher.go
+++ b/pkg/docker/pusher.go
@@ -201,7 +201,8 @@ func (n *Pusher) pushImage(ctx context.Context, f fn.Function, credentials Crede
 	if err == nil {
 		return digest, nil
 	}
-	if strings.Contains(err.Error(), "no such host") {
+	errStr := err.Error()
+	if strings.Contains(errStr, "no such host") || strings.Contains(errStr, "failure in name resolution") {
 		// push with custom transport to be able to push into cluster private registries
 		return n.push(ctx, f, credentials, output)
 	}
diff --git a/pkg/pipelines/tekton/gitlab_test.go b/pkg/pipelines/tekton/gitlab_test.go
index f53a1dc59..5da692903 100644
--- a/pkg/pipelines/tekton/gitlab_test.go
+++ b/pkg/pipelines/tekton/gitlab_test.go
@@ -67,7 +67,7 @@ func TestGitlab(t *testing.T) {
 	ns := usingNamespace(t)
 	t.Logf("testing in namespace: %q", ns)
 
-	funcImg := fmt.Sprintf("ttl.sh/func/fn-%s:5m", uuid.NewUUID())
+	funcImg := fmt.Sprintf("registry.default.svc.cluster.local:5000/fn-%s", uuid.NewUUID())
 
 	f := fn.Function{
 		Root:     projDir,