diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 52b090bd26133fb4ab2d32271699c06e1b54d579..c520a1695280c1761888baab17feb03c73e52010 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -24,7 +24,7 @@ test:
     - pip install tox  # you can also use tox
     - pip install --editable ".[test]"
     - python -c "import combo"
-    - tox -e py
+    - python -m tox -e py
 
 
 #before_script: