diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index 3937f78e6fd15ce89620f08200e549b2210258a7..bdcad33cb409c39d933276f389ca83b7af7da491 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -22,7 +22,7 @@ build:
 test:
   script:
   #- python3 setup.py test
-  - pip3 install --user tox flake8  # you can also use tox
+  - pip3 install --user tox flake8 networkx  # you can also use tox
   #- tox -e py36,flake8
   - python3 -m flake8 navipy/*.py
   - python3 -m unittest discover navipy