fix wrongly running macos workflow on ubunti-latest + formatting

Author: albertedwardson

.github/workflows/tests-macos.yml

@@ -11,25 +11,37 @@ on:
 jobs:
   tests:
 
-    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix:
-        python-version: ["3.9", "3.10", "3.11", "3.12", "3.13", "3.14.0-rc.1"]
+        os:
+          - macos-latest
+          - macos-13
+        python-version:
+          - "3.9"
+          - "3.10"
+          - "3.11"
+          - "3.12"
+          - "3.13"
+          - "3.14.0-rc.1"
+          - "pypy3.10"
+          - "pypy3.11"
+
+    runs-on: "${{ matrix.os }}"
 
     steps:
-    - uses: actions/checkout@v4
+      - uses: actions/checkout@v4
 
-    - name: Set up Python ${{ matrix.python-version }}
-      uses: actions/setup-python@v5
-      with:
-        python-version: ${{ matrix.python-version }}
+      - name: "Set up Python ${{ matrix.python-version }}"
+        uses: actions/setup-python@v5
+        with:
+          python-version: "${{ matrix.python-version }}"
 
-    - name: Run tests
-      run: |
-        pip install --upgrade pip
-        pip install --upgrade tox
-        tox -e py
+      - name: Run tests
+        run: |
+          pip install --upgrade pip
+          pip install --upgrade tox
+          tox -e py
 
-    - name: Upload coverage report
-      uses: codecov/codecov-action@v5
+      - name: Upload coverage report
+        uses: codecov/codecov-action@v5