* ✅ Simplify tests for background_tasks. PR [#13166](https://github.com/fastapi/fastapi/pull/13166) by [@alejsdev](https://github.com/alejsdev).
* ✅ Simplify tests for additional_status_codes. PR [#13149](https://github.com/fastapi/fastapi/pull/13149) by [@tiangolo](https://github.com/tiangolo).