diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 083ec28ae4893aa150522b23b124bb76337ac624..d33d5e449a7eb9f32d6d90e86de318fdbd9c4523 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -28,7 +28,7 @@ before_script:
 test:
   script:
     - pip install pytest
-    - pytest
+    - pytest --doctest-modules
 
 pages:
   script: