diff --git a/test.Dockerfile b/test.Dockerfile
index 5aaf0a28..34bcf3a7 100644
--- a/test.Dockerfile
+++ b/test.Dockerfile
@@ -1 +1 @@
-FROM hello-world
+FROM hello-world@sha256:91fb4b041da273d5a3273b6d587d62d518300a6ad268b28628f74997b93171b2