run pytest only on ubuntu

Author: vivekbhr

.github/workflows/test.yml

@@ -44,11 +44,13 @@ jobs:
         which sincei
         sincei --help
     - name: Generate coverage report
-      run: |
-        pip install pytest
-        pip install pytest-cov
-        pytest --cov=./ 
+      if: matrix.os == 'ubuntu-latest'
+        run: |
+          pip install pytest
+          pip install pytest-cov
+          pytest --cov=./
     - name: Upload coverage to Codecov
+      if: matrix.os == 'ubuntu-latest'
       uses: codecov/codecov-action@v3
       with:
         token: ${{ secrets.CODECOV_TOKEN }}