Running tests hang

[sosthene-nitrokey]

$ pipenv run pytest test_comm.py
================================================ test session starts =================================================
platform linux -- Python 3.11.5, pytest-7.4.3, pluggy-1.3.0
rootdir: /mnt/bigdrive/soso-nitrokey/Code/nitrokey-websmartcard-tests
configfile: pytest.ini
plugins: reporter-0.5.2, repeat-0.9.3, reporter-html1-0.8.3
collected 71 items                                                                                                   

test_comm.py .

Then the test hang, even if the device is detached (tested with usbip).