diff --git a/test/test_images/helloworld/helloworld.yaml b/test/test_images/helloworld/helloworld.yaml
index 446fa48e1a29..f1f5c0223075 100644
--- a/test/test_images/helloworld/helloworld.yaml
+++ b/test/test_images/helloworld/helloworld.yaml
@@ -28,7 +28,6 @@ spec:
           httpGet:
             path: /
           initialDelaySeconds: 3
-          periodSeconds: 3
 ---
 apiVersion: serving.knative.dev/v1
 kind: Route