tox should not rely on "/path_to/pythonX.Y /path1_to/virtualenv.py pyXY" to create a virtualenv with pyXY/bin/python to be of version X.Y.*. If you have specified a default python version for virtualenv, .e.g in the config, the version specified there will of course be taken. tox should use /path_to/pythonX.Y /path1_to/virtualenv.py --python /path_to/pythonX.Y pyXY The worse part is that if the default environment runs the test correctly, you really have to look carefully at the beginning of the output to see what test run passed.
You caught us doing some quick maintenance, temporarily restricting your repository to read-only access.
Issue #108 on hold