Downgrading pytest version

.github/workflows/test.yml

@@ -30,7 +30,7 @@ jobs:
       - name: Install dependencies
         run: |
           python -m pip install --upgrade pip
-          pip install coverage pytest pytest-cases pytest-mock pytest-qt pytest-xvfb
+          pip install coverage pytest<8.0.0 pytest-cases pytest-mock pytest-qt pytest-xvfb
       - name: Install package
         run: python -m pip install -e .
       - name: Test with pytest