(python3) km@km-pt ~/g/i/commit-message-validator> cat tox.ini 
[tox]

# Environements to execute when invoking 'tox'
envlist = py{27,34,35,36,37}-{flake8,pytest}
skip_missing_interpreters = True
requires = tox-wikimedia

[testenv]
deps =
    pytest: six

[testenv:sample]
commands = python commit_message_validator/tests/sample_repository.py {posargs}

[flake8]
exclude = .tox
max_line_length = 120

(python3) km@km-pt ~/g/i/commit-message-validator> tox
GLOB sdist-make: /home/km/gerrit/integration/commit-message-validator/setup.py
py27-flake8 create: /home/km/gerrit/integration/commit-message-validator/.tox/py27-flake8
py27-flake8 installdeps: flake8
py27-flake8 inst: /home/km/gerrit/integration/commit-message-validator/.tox/.tmp/package/1/commit-message-validator-0.6.0.zip
py27-flake8 installed: DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support,commit-message-validator==0.6.0,configparser==3.7.4,entrypoints==0.3,enum34==1.1.6,flake8==3.7.8,functools32==3.2.3.post2,mccabe==0.6.1,pycodestyle==2.5.0,pyflakes==2.1.1,typing==3.7.4
py27-flake8 run-test-pre: PYTHONHASHSEED='2106344467'
py27-flake8 runtests: commands[0] | flake8
py27-pytest create: /home/km/gerrit/integration/commit-message-validator/.tox/py27-pytest
py27-pytest installdeps: six, pytest
py27-pytest inst: /home/km/gerrit/integration/commit-message-validator/.tox/.tmp/package/1/commit-message-validator-0.6.0.zip
py27-pytest installed: DEPRECATION: Python 2.7 will reach the end of its life on January 1st, 2020. Please upgrade your Python as Python 2.7 won't be maintained after that date. A future version of pip will drop support for Python 2.7. More details about Python 2 support in pip, can be found at https://pip.pypa.io/en/latest/development/release-process/#python-2-support,atomicwrites==1.3.0,attrs==19.1.0,commit-message-validator==0.6.0,configparser==3.7.4,contextlib2==0.5.5,funcsigs==1.0.2,importlib-metadata==0.18,more-itertools==5.0.0,packaging==19.0,pathlib2==2.3.4,pluggy==0.12.0,py==1.8.0,pyparsing==2.4.0,pytest==4.6.4,scandir==1.10.0,six==1.12.0,wcwidth==0.1.7,zipp==0.5.2
py27-pytest run-test-pre: PYTHONHASHSEED='2106344467'
py27-pytest runtests: commands[0] | pytest
============================= test session starts ==============================
platform linux2 -- Python 2.7.16, pytest-4.6.4, py-1.8.0, pluggy-0.12.0
cachedir: .tox/py27-pytest/.pytest_cache
rootdir: /home/km/gerrit/integration/commit-message-validator
collected 34 items                                                             

commit_message_validator/tests/test_GerritMessageValidator.py .          [  2%]
commit_message_validator/tests/test_commit-message-validator.py ........ [ 26%]
....................                                                     [ 85%]
commit_message_validator/tests/test_message_validator.py .....           [100%]

========================== 34 passed in 0.23 seconds ===========================
py34-flake8 create: /home/km/gerrit/integration/commit-message-validator/.tox/py34-flake8
py34-flake8 installdeps: flake8
py34-flake8 inst: /home/km/gerrit/integration/commit-message-validator/.tox/.tmp/package/1/commit-message-validator-0.6.0.zip
py34-flake8 installed: DEPRECATION: Python 3.4 support has been deprecated. pip 19.1 will be the last one supporting it. Please upgrade your Python as Python 3.4 won't be maintained after March 2019 (cf PEP 429).,commit-message-validator==0.6.0,entrypoints==0.3,flake8==3.7.8,mccabe==0.6.1,pycodestyle==2.5.0,pyflakes==2.1.1,typing==3.7.4
py34-flake8 run-test-pre: PYTHONHASHSEED='2106344467'
py34-flake8 runtests: commands[0] | /home/km/gerrit/integration/commit-message-validator/.tox/py27-flake8/bin/flake8
py34-pytest create: /home/km/gerrit/integration/commit-message-validator/.tox/py34-pytest
py34-pytest installdeps: six, pytest
py34-pytest inst: /home/km/gerrit/integration/commit-message-validator/.tox/.tmp/package/1/commit-message-validator-0.6.0.zip
py34-pytest installed: DEPRECATION: Python 3.4 support has been deprecated. pip 19.1 will be the last one supporting it. Please upgrade your Python as Python 3.4 won't be maintained after March 2019 (cf PEP 429).,atomicwrites==1.3.0,attrs==19.1.0,commit-message-validator==0.6.0,importlib-metadata==0.18,more-itertools==7.2.0,packaging==19.0,pathlib2==2.3.4,pluggy==0.12.0,py==1.8.0,pyparsing==2.4.0,pytest==4.6.4,scandir==1.10.0,six==1.12.0,wcwidth==0.1.7,zipp==0.5.2
py34-pytest run-test-pre: PYTHONHASHSEED='2106344467'
py34-pytest runtests: commands[0] | /home/km/gerrit/integration/commit-message-validator/.tox/py27-pytest/bin/pytest
============================= test session starts ==============================
platform linux2 -- Python 2.7.16, pytest-4.6.4, py-1.8.0, pluggy-0.12.0
cachedir: .tox/py34-pytest/.pytest_cache
rootdir: /home/km/gerrit/integration/commit-message-validator
collected 34 items                                                             

commit_message_validator/tests/test_GerritMessageValidator.py .          [  2%]
commit_message_validator/tests/test_commit-message-validator.py ........ [ 26%]
....................                                                     [ 85%]
commit_message_validator/tests/test_message_validator.py .....           [100%]

========================== 34 passed in 0.23 seconds ===========================
py35-flake8 create: /home/km/gerrit/integration/commit-message-validator/.tox/py35-flake8
py35-flake8 installdeps: flake8
py35-flake8 inst: /home/km/gerrit/integration/commit-message-validator/.tox/.tmp/package/1/commit-message-validator-0.6.0.zip
py35-flake8 installed: commit-message-validator==0.6.0,entrypoints==0.3,flake8==3.7.8,mccabe==0.6.1,pycodestyle==2.5.0,pyflakes==2.1.1
py35-flake8 run-test-pre: PYTHONHASHSEED='2106344467'
py35-flake8 runtests: commands[0] | /home/km/gerrit/integration/commit-message-validator/.tox/py27-flake8/bin/flake8
py35-pytest create: /home/km/gerrit/integration/commit-message-validator/.tox/py35-pytest
py35-pytest installdeps: six, pytest
py35-pytest inst: /home/km/gerrit/integration/commit-message-validator/.tox/.tmp/package/1/commit-message-validator-0.6.0.zip
py35-pytest installed: atomicwrites==1.3.0,attrs==19.1.0,commit-message-validator==0.6.0,importlib-metadata==0.18,more-itertools==7.2.0,packaging==19.0,pathlib2==2.3.4,pluggy==0.12.0,py==1.8.0,pyparsing==2.4.0,pytest==5.0.1,six==1.12.0,wcwidth==0.1.7,zipp==0.5.2
py35-pytest run-test-pre: PYTHONHASHSEED='2106344467'
py35-pytest runtests: commands[0] | /home/km/gerrit/integration/commit-message-validator/.tox/py27-pytest/bin/pytest
============================= test session starts ==============================
platform linux2 -- Python 2.7.16, pytest-4.6.4, py-1.8.0, pluggy-0.12.0
cachedir: .tox/py35-pytest/.pytest_cache
rootdir: /home/km/gerrit/integration/commit-message-validator
collected 34 items                                                             

commit_message_validator/tests/test_GerritMessageValidator.py .          [  2%]
commit_message_validator/tests/test_commit-message-validator.py ........ [ 26%]
....................                                                     [ 85%]
commit_message_validator/tests/test_message_validator.py .....           [100%]

========================== 34 passed in 0.22 seconds ===========================
py36-flake8 create: /home/km/gerrit/integration/commit-message-validator/.tox/py36-flake8
py36-flake8 installdeps: flake8
py36-flake8 inst: /home/km/gerrit/integration/commit-message-validator/.tox/.tmp/package/1/commit-message-validator-0.6.0.zip
py36-flake8 installed: commit-message-validator==0.6.0,entrypoints==0.3,flake8==3.7.8,mccabe==0.6.1,pycodestyle==2.5.0,pyflakes==2.1.1
py36-flake8 run-test-pre: PYTHONHASHSEED='2106344467'
py36-flake8 runtests: commands[0] | /home/km/gerrit/integration/commit-message-validator/.tox/py27-flake8/bin/flake8
py36-pytest create: /home/km/gerrit/integration/commit-message-validator/.tox/py36-pytest
py36-pytest installdeps: six, pytest
py36-pytest inst: /home/km/gerrit/integration/commit-message-validator/.tox/.tmp/package/1/commit-message-validator-0.6.0.zip
py36-pytest installed: atomicwrites==1.3.0,attrs==19.1.0,commit-message-validator==0.6.0,importlib-metadata==0.18,more-itertools==7.2.0,packaging==19.0,pluggy==0.12.0,py==1.8.0,pyparsing==2.4.0,pytest==5.0.1,six==1.12.0,wcwidth==0.1.7,zipp==0.5.2
py36-pytest run-test-pre: PYTHONHASHSEED='2106344467'
py36-pytest runtests: commands[0] | /home/km/gerrit/integration/commit-message-validator/.tox/py27-pytest/bin/pytest
============================= test session starts ==============================
platform linux2 -- Python 2.7.16, pytest-4.6.4, py-1.8.0, pluggy-0.12.0
cachedir: .tox/py36-pytest/.pytest_cache
rootdir: /home/km/gerrit/integration/commit-message-validator
collected 34 items                                                             

commit_message_validator/tests/test_GerritMessageValidator.py .          [  2%]
commit_message_validator/tests/test_commit-message-validator.py ........ [ 26%]
....................                                                     [ 85%]
commit_message_validator/tests/test_message_validator.py .....           [100%]

========================== 34 passed in 0.24 seconds ===========================
py37-flake8 create: /home/km/gerrit/integration/commit-message-validator/.tox/py37-flake8
py37-flake8 installdeps: flake8
py37-flake8 inst: /home/km/gerrit/integration/commit-message-validator/.tox/.tmp/package/1/commit-message-validator-0.6.0.zip
py37-flake8 installed: commit-message-validator==0.6.0,entrypoints==0.3,flake8==3.7.8,mccabe==0.6.1,pycodestyle==2.5.0,pyflakes==2.1.1
py37-flake8 run-test-pre: PYTHONHASHSEED='2106344467'
py37-flake8 runtests: commands[0] | /home/km/gerrit/integration/commit-message-validator/.tox/py27-flake8/bin/flake8
py37-pytest create: /home/km/gerrit/integration/commit-message-validator/.tox/py37-pytest
py37-pytest installdeps: six, pytest
py37-pytest inst: /home/km/gerrit/integration/commit-message-validator/.tox/.tmp/package/1/commit-message-validator-0.6.0.zip
py37-pytest installed: atomicwrites==1.3.0,attrs==19.1.0,commit-message-validator==0.6.0,importlib-metadata==0.18,more-itertools==7.2.0,packaging==19.0,pluggy==0.12.0,py==1.8.0,pyparsing==2.4.0,pytest==5.0.1,six==1.12.0,wcwidth==0.1.7,zipp==0.5.2
py37-pytest run-test-pre: PYTHONHASHSEED='2106344467'
py37-pytest runtests: commands[0] | /home/km/gerrit/integration/commit-message-validator/.tox/py27-pytest/bin/pytest
============================= test session starts ==============================
platform linux2 -- Python 2.7.16, pytest-4.6.4, py-1.8.0, pluggy-0.12.0
cachedir: .tox/py37-pytest/.pytest_cache
rootdir: /home/km/gerrit/integration/commit-message-validator
collected 34 items                                                             

commit_message_validator/tests/test_GerritMessageValidator.py .          [  2%]
commit_message_validator/tests/test_commit-message-validator.py ........ [ 26%]
....................                                                     [ 85%]
commit_message_validator/tests/test_message_validator.py .....           [100%]

========================== 34 passed in 0.27 seconds ===========================
___________________________________ summary ____________________________________
  py27-flake8: commands succeeded
  py27-pytest: commands succeeded
  py34-flake8: commands succeeded
  py34-pytest: commands succeeded
  py35-flake8: commands succeeded
  py35-pytest: commands succeeded
  py36-flake8: commands succeeded
  py36-pytest: commands succeeded
  py37-flake8: commands succeeded
  py37-pytest: commands succeeded
  congratulations :)