diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index afbfaa7c22aed2a31b256ff27ab9dc45a1224ae0..e20e0c143bc2ee5158de3e79651f5bf71a0fa652 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -29,7 +29,7 @@ stages:
         tag=""
         echo "Running on tagged default branch '$CI_DEFAULT_BRANCH': tag = 'latest'"
       else
-        tag=":$CI_COMMIT_REF_SLUG"
+        tag="$CI_COMMIT_REF_SLUG"
         echo "Running on branch '$CI_COMMIT_BRANCH': tag = $tag"
       fi
     - apk add --update make bash docker-compose
@@ -184,7 +184,7 @@ integration_test_docker:
         tag=""
         echo "Running on tagged default branch '$CI_DEFAULT_BRANCH': tag = 'latest'"
       else
-        tag=":$CI_COMMIT_REF_SLUG"
+        tag="$CI_COMMIT_REF_SLUG"
         echo "Running on branch '$CI_COMMIT_BRANCH': tag = $tag"
       fi
     - apk add --update make bash docker-compose