Use correct test runner

.github/workflows/python-publish.yml

@@ -31,8 +31,8 @@ jobs:
           # exit-zero treats all errors as warnings. The GitHub editor is 127 chars wide
           flake8 . --count --exit-zero --max-complexity=10 --max-line-length=127 --statistics
 
-      - name: Test with nose
-        run: nosetests tests -d
+      - name: Run unit tests
+        run:  python -m unittest -v
 
   deploy:
     needs: test