diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index ea2f40c45968ed52baff0153146e607fa7781a05..c0644eda3c14929d307c8afc1a94fba65135d267 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -4,4 +4,6 @@ build:
     - docker
   script:
     - pip install --upgrade pip setuptools wheel
+    - pip install cython numpy
     - pip install '.'
+    - tox