forgot flake8

.github/workflows/python-test.yml

@@ -34,7 +34,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          python -m pip install pytest
+          python -m pip install pytest flake8
           python -m pip install -r test-requirements.txt
       - name: Lint with flake8
         run: |