diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 84eea808c256b2118945022f27370e62a9ae577b..65498def7ef8a40187c4a58aa37e89e8e7030bdf 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -34,6 +34,9 @@ pysafety:
 capitalize:
   stage: test
   image: it4innovations/docker-mkdocscheck:latest
+  before_script:
+  - source /opt/.venv3/bin/activate
+  - python -V # debug
   script:
   - find mkdocs.yml docs.it4i/ \( -name '*.md' -o -name '*.yml' \) -print0 | xargs -0 -n1 scripts/titlemd.py --test