Try tox for tests, black

.github/workflows/black.yml

@@ -11,7 +11,14 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v3
-      - uses: actions/setup-python@v4
-      - uses: psf/[email protected]
-        with:
-          version: 22.12.0
+    - name: Set up Python
+      uses: actions/setup-python@v4
+      with:
+        python-version: 3.9
+    - name: Install Dependencies
+      run: |
+        python -m pip install --upgrade pip
+        pip install tox==4.11.3
+    - name: Run black
+        run: |
+          tox -e black

.github/workflows/pytest.yml

@@ -21,4 +21,4 @@ jobs:
         pip install tox==4.11.3
     - name: Run Tests
       run: |
-        pytest
+        tox -e py39