diff --git a/README.md b/README.md
index 439145f..fd20626 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 
 Docker container to run the Maven Versions plugin.
 
+[![Dockerfile](https://img.shields.io/badge/GitHub-Dockerfile-blue)](https://github.com/leplusorg/docker-maven-check-versions/blob/main/maven-check-versions/Dockerfile)
 [![Docker Build](https://github.com/leplusorg/docker-maven-check-versions/workflows/Docker/badge.svg)](https://github.com/leplusorg/docker-maven-check-versions/actions?query=workflow:"Docker")
 [![Docker Stars](https://img.shields.io/docker/stars/leplusorg/maven-check-versions)](https://hub.docker.com/r/leplusorg/maven-check-versions)
 [![Docker Pulls](https://img.shields.io/docker/pulls/leplusorg/maven-check-versions)](https://hub.docker.com/r/leplusorg/maven-check-versions)
diff --git a/maven-check-versions/docker-compose.test.yml b/maven-check-versions/docker-compose.test.yml
index 3f96e43..91f346a 100644
--- a/maven-check-versions/docker-compose.test.yml
+++ b/maven-check-versions/docker-compose.test.yml
@@ -6,4 +6,4 @@ services:
     build:
       context: .
       dockerfile: Dockerfile
-    command: "sh -c '[ $(id -u) -ne 0 ] && mvn -v'"
+    command: "sh -c '[ $$(id -u) -eq 1000 ] && mvn -v'"