bugfix (3)

.github/workflows/check-test.yml

@@ -37,7 +37,7 @@ jobs:
         run: |
           python -m pip install --upgrade pip
           pip install -r requirements.txt
-          pip install pytest pytest-asyncio pytest-xdist yaml
+          pip install pytest pytest-asyncio pytest-xdist PyYAML
 
       - name: Install the package
         run: pip install -e .