The testing library hypothesis made a threading change in release 6.0.4 to address a possible race condition.

On my Apple M1 Pro laptop, this works fine with pytest-httpserver for Python 3.7 - 3.9 (and presumably earlier but i have not checked).

On Python 3.10 and 3.11, all tests run just fine, but the process then hangs and will not exit without ctrl-C. The problem occurs with the latest version of hypothesis as well, but not with hypothesis 6.0.3.

The problem only occurs with pytest-httpserver installed (I tested the current 1.0.6 version, 1.0.0, and the last 0.x version, all of which had the problem). I will also file the bug with hypothesis in case there is an issue on their end.

I have included all environment details, code to reproduce, session logs, and relevant python -vvv output in this gist.