diff --git a/test.Dockerfile b/test.Dockerfile
index 5aaf0a281..b1184abb5 100644
--- a/test.Dockerfile
+++ b/test.Dockerfile
@@ -1 +1 @@
-FROM hello-world
+FROM hello-world@sha256:d211f485f2dd1dee407a80973c8f129f00d54604d2c90732e8e320e5038a0348