celery: clarify that celery 4 doesn't work The latest supported Celery version, 3.1.26.post2, is the latest in the whole 3 series. It works fine. But celery-4.0.0 doesn't work at all when testing. For now, just make it explicit that this is the limit.

[tox]
minversion = 1.8
envlist = py{26,27}-pytest

[testenv]
setenv =
    PYTHONHASHSEED = 0
deps =
    -r{toxinidir}/dev_requirements.txt
    py26-pytest: unittest2
    python-ldap
    python-pam
commands =
    pytest: py.test {posargs}