diff --git a/get-images-from-files/test.Dockerfile b/get-images-from-files/test.Dockerfile
index 9ce0c9b..ad816ea 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@sha256:1881968aff6f7cdcc4b888c00a11f4ce241ad7ec957e0cb4a9e19e93a3ff87ea