venv for CI

.gitlab-ci.yml

@@ -8,10 +8,12 @@ test:
   tags:
     - docker
   script:
+    - python -m venv .venv
+    - source .venv/bin/activate
     - pip install flit
     - flit install
     - pip install git+https://github.com/boileaum/bookbook.git@master
-    - python -m pytest tests -v
+    - python -m pytest -v
 
 deploy:
   stage: deploy