diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index eeb94e3d7df3b720ea870066e896ae1a82812fdc..a2f9f4bc5205c0d34aa646a09c5f96582af1a0df 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -37,6 +37,8 @@ test_maxima:
   variables:
     MOODLE_BRANCH: "MOODLE_37_STABLE"
     QSTACK_VERSION: "v4.3.2"
+  tags:
+    - docker
   script:
   - apt update && apt install git-core postgresql-client texinfo
   - cd $CI_PROJECT_DIR/..