diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 9ae7e3525..378bac6b2 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -109,6 +109,7 @@ unit:mac:
     - cd test
     - ln -s /Volumes/builds/Clinica/data_ci ./data
     - pytest -v
+    - module purge
     - source deactivate