Missing dep on trio?

[SnarkBoojum]

Trying to update ipykernel's Debian package to 6.13.0, tests fail because trio isn't available ; I find it strange that it isn't mentioned in setup.py.

[blink1073]

The trio and curio should be test dependencies are meant to be optional, they are skipped in tests if not available. I assume you're failing on test discovery on ipykernel/trio_runner.py? We handle that by using pytest testpath.