update pip

.gitlab-ci.yml

@@ -98,6 +98,7 @@ tests:
   script:
     - python3.6 -m venv venv/
     - source venv/bin/activate
+    - pip install --upgrade pip
     - pip install -r requirements.txt
     - chmod +x ./CI/run_pytest.sh
     - ./CI/run_pytest.sh