============================= test session starts ==============================
platform linux -- Python 3.9.6, pytest-6.2.4, py-1.10.0, pluggy-0.13.1
rootdir: /tmp/pytest-of-runner/pytest-0/test_only_xfail0
collected 1 item

f.py x                                                                   [100%]

============================== 1 xfailed in 0.01s ==============================