$ python3.8 --version
Python 3.8.12
$ tox -e py38 --notest
ROOT: No tox.ini or setup.cfg or pyproject.toml found, assuming empty tox.ini at /tmp/tmp.FN9goITk7Q
  py38: OK (0.11 seconds)
  congratulations :) (0.15 seconds)
$ .tox/py38/bin/python --version
Python 3.8.6

$ /usr/bin/python3.8 --version
Python 3.8.6
$ pyenv versions
  system
  3.5.10
  3.6.15
  3.7.12
* 3.8.12 (set by /tmp/tmp.FN9goITk7Q/.python-version)
  3.9.9
  3.10.1
  3.11.0
  3.11.1