test.yml - use setup python everywhere and change pytest to python -m…

… python

.github/workflows/test.yml

@@ -16,12 +16,11 @@ jobs:
 
       - name: Set up Python
         uses: actions/setup-python@v5
-        if: matrix.os == 'ubuntu-latest'
         with:
           python-version: '3.7'
 
       - name: Install
         run: pip install .[tests]
 
       - name: Run tests
-        run: pytest -vs ./tests
+        run: python -m pytest -vs ./tests