diff --git a/act/runner/testdata/actions-environment-and-context-tests/docker/Dockerfile b/act/runner/testdata/actions-environment-and-context-tests/docker/Dockerfile
index bd8fcb22..f50a50da 100644
--- a/act/runner/testdata/actions-environment-and-context-tests/docker/Dockerfile
+++ b/act/runner/testdata/actions-environment-and-context-tests/docker/Dockerfile
@@ -1,4 +1,4 @@
-FROM alpine:3
+FROM code.forgejo.org/oci/alpine:latest
 
 COPY entrypoint.sh /entrypoint.sh