Attempt to fix tests

.github/workflows/python-app.yml → .github/workflows/run-tests.yml

@@ -26,8 +26,7 @@ jobs:
     - name: Install dependencies
       run: |
         python -m pip install --upgrade pip
-        pip install flake8 pytest
-        if [ -f requirements.txt ]; then pip install -r requirements.txt; fi
+        pip install setuptools Cython flake8 pytest
     - name: Lint with flake8
       run: |
         # stop the build if there are Python syntax errors or undefined names