Fix coverage: use default file locations

.github/workflows/test.yml

@@ -47,9 +47,4 @@ jobs:
       - run: pip install -U tox tox-gh-actions django
       # TODO: postgres setup and proper djangomain testing
       - run: python -m tox
-      - run: |
-          mkdir /tmp/coverage
-          find .tox -type f -name 'coverage*xml' -exec mv '{}' /tmp/coverage ';'
       - uses: codecov/codecov-action@v3
-        with:
-          directory: /tmp/coverage

docs/contributing.rst

@@ -13,7 +13,7 @@ We require features to be backed by a unit test.
 This way, we can test *django-polymorphic* against new Django versions.
 To run the included test suite, execute::
 
-    py.test
+    pytest
 
 To test support for multiple Python and Django versions, run tox from the repository root::
 
@@ -24,8 +24,6 @@ The Python versions need to be installed at your system.
 On Linux, download the versions at http://www.python.org/download/releases/.
 On MacOS X, use Homebrew_ to install other Python versions.
 
-We currently support Python 3.5, 3.6, 3.7, and 3.8.
-
 
 Example project
 ----------------

tox.ini

@@ -24,7 +24,7 @@ deps =
 	djangomain: https://github.com/django/django/archive/main.tar.gz
 	postgres: psycopg2
 commands =
-	py.test --cov --cov-report=term-missing --cov-report=xml .
+	pytest --cov --cov-report=term-missing --cov-report=xml .
 
 [testenv:docs]
 deps =