On integration tests file collection,
the value of `environment.executable` can also be a symlink
(e.g. in a virtualenv) with a different name than,
but pointing to the same as `sys.executable`
(e.g. .../bin/python3.10 and .../bin/python, respectively).
That causes skipping the collection of `completion/pytest.py`
and `completion/conftest.py` a lot of times, depending on the environment.
(e.g. "60 skipped" before x "23 skipped" after, in a local virtualenv)
fa0c064841