diff --git a/get-images-from-files/test.Dockerfile b/get-images-from-files/test.Dockerfile
index 9ce0c9b..a9ae8f8 100644
--- a/get-images-from-files/test.Dockerfile
+++ b/get-images-from-files/test.Dockerfile
@@ -10,4 +10,4 @@ FROM example.com/library/base@sha256:aaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaaa
 ## Short repo:tag (ignored by design; only registry refs are extracted)
 FROM nginx:3.19
 ## With digest only but no registry (ignored)
-FROM nginx@sha256:1234567890abcdef1234567890abcdef1234567890abcdef1234567890abcdef
+FROM nginx@sha256:42f2d24ae18df9b5251d1cc45548085656d2335e9338fd150a24e415462d151f