pytest issue tracker to report bugs or suggest features (for version 2.0 and above).
pytest on stackoverflow.com to post questions with the tag
pytest. New Questions will usually be seen by pytest users or developers and answered quickly.
Testing In Python: a mailing list for Python testing tools and discussion.
pytest-dev at python.org (mailing list) pytest specific announcements and discussions.
pytest-commit at python.org (mailing list): for commits and new issues
contribution guide for help on submitting pull requests to GitHub.
#pylibon irc.freenode.net IRC channel for random questions.
private mail to Holger.Krekel at gmail com if you want to communicate sensitive issues
merlinux.eu offers pytest and tox-related professional teaching and consulting.