GitHub Actions: Run tests_with_pytz_installed

Author: cclauss

.github/workflows/main.yml

@@ -58,6 +58,27 @@ jobs:
       run: |
         codecov -e TOXENV,DJANGO
 
+  tests_with_pytz_installed:
+    name: Python 3.x with pytz installed
+    runs-on: ubuntu-20.04
+
+    steps:
+    - uses: actions/checkout@v4
+
+    - uses: actions/setup-python@v5
+      with:
+        python-version: 3.x
+        cache: 'pip'
+        cache-dependency-path: 'requirements/*.txt'
+
+    - name: Upgrade packaging tools
+      run: python -m pip install --upgrade pip setuptools virtualenv wheel
+
+    - name: Install dependencies
+      run: python -m pip install --upgrade codecov pytz tox
+
+    - run: tox -e py
+
   test-docs:
     name: Test documentation links
     runs-on: ubuntu-22.04