service/donate.md

@@ -747,14 +747,23 @@ See [tpo/web/donate-neo#75](https://gitlab.torproject.org/tpo/web/donate-neo/-/i
 
 ## Tests
 
-<!-- how the service can be tested, for example after major changes -->
-<!-- like IP address changes or upgrades. describe CI, test suites, linting -->
-
-TODO: how do we run the test suite or test that things are still working after an upgrade? (@stephen) also cross-ref with @mattlav's checklist
-
 To test donations after upgrades or to confirm everything works, see
 the [Testing the donation site](#testing-the-donation-site) section.
 
+The site's test suite is ran in GitLab CI when a merge request is
+sent, and a full review app is setup to test the site before the
+branch is merged. Then staging must be tested as well.
+
+Tests can be ran locally:
+
+    coverage run manage.py test
+
+This assumes a local development setup with Poetry, see the project's
+README file for details.
+
+Code is linted with `flake8`, `mypy` and test coverage with
+[coverage](https://pypi.org/project/coverage/).
+
 ## Logs
 
 The logs may be accessed using the `podman logs <container>` command, as the