diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 2a9e8d6c84c2dd028cc1e6bfa4ac106e7a239579..db593622990e86bddda74de01f1df4d43a88f857 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -29,7 +29,7 @@ test_py37:
     script:
       - apt-get -y update
       - pip install pytest pytest-cov
-      - pip install .
+      - pip install -e .
       - pytest eossr/
         --junitxml=junit_py37.xml
         --color=yes