tests: don't silence errors while creating test index "Errors should never pass silently." For example, I had the problem, that a previous test did not clean up the lock file for the index_dir, which then caused the future tests to fail. Because the error has been silenced, it took a while until I found the reason.

[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}