Install py to handle https://github.com/kevlened/pytest-parallel/issu…

…es/118\#issuecomment-1294063209

.github/workflows/CI.yml

@@ -49,7 +49,7 @@ jobs:
           local-identifier: 'random'
       - name: Test
         run: |
-          pip install pytest pytest-parallel selenium
+          pip install pytest pytest-parallel py selenium
           cd test
           ./test.sh
       - name: 'Stop BrowserStackLocal'