Long story short

I get this when I run pytest with -s.

Apparently it was already noticed and dealt with here:

Expected behaviour

No warnings

Actual behaviour

Warnings

Steps to reproduce

The following test:
python -m pytest tests/test_web_functional.py::test_subapp_reverse_static_url[pyloop] -x -s

Your environment

I get it in python3.7 and python3.8.
Linux Mint 18.3
On aiohttp master

Any suggestions on how do fix it?
Maybe a sync and async version of noop?
I can make a pull request.