diff --git a/cmd/activator/main.go b/cmd/activator/main.go
index e842f2689e08..3d2633023d38 100644
--- a/cmd/activator/main.go
+++ b/cmd/activator/main.go
@@ -245,8 +245,8 @@ func main() {
 	// Enable TLS server when activator-server-cert is specified.
 	// At this moment activator with TLS does not disable HTTP.
 	// See also https://github.com/knative/serving/issues/12808.
-	if networkConfig.ActivatorServerCert != "" {
-		secret, err := kubeClient.CoreV1().Secrets(system.Namespace()).Get(ctx, networkConfig.ActivatorServerCert, metav1.GetOptions{})
+	if networkConfig.ActivatorCertSecret != "" {
+		secret, err := kubeClient.CoreV1().Secrets(system.Namespace()).Get(ctx, networkConfig.ActivatorCertSecret, metav1.GetOptions{})
 		if err != nil {
 			logger.Fatalw("failed to get secret", zap.Error(err))
 		}
diff --git a/test/config/tls/config-network.yaml b/test/config/tls/config-network.yaml
index eee9fe00c50e..6a3b909b8a48 100644
--- a/test/config/tls/config-network.yaml
+++ b/test/config/tls/config-network.yaml
@@ -23,4 +23,4 @@ metadata:
 data:
   activator-ca: "serving-ca"
   activator-san: "knative"
-  activator-server-certs: "server-certs"
+  activator-cert-secret: "server-certs"