diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index c7ff2229..7201ec81 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -2,7 +2,7 @@ image: php
 
 variables:
   DOCKER_DRIVER: overlay2
-  TEST_IMAGE: ${CI_REGISTRY_IMAGE}:${CI_COMMIT_REF_NAME}
+  TEST_IMAGE: ${CI_REGISTRY_IMAGE}:${CI_COMMIT_REF_SLUG}
   RELEASE_IMAGE: ${CI_REGISTRY_IMAGE}:latest
   MYSQL_DATABASE: engelsystem
   MYSQL_USER: engel