gistfile1.txt

We have a weird regression, and I think what I will show is an unexpected behavior of tox. The project is way more complicated, but this simple example exhibits the problem:

the project folder is empty except

tox.ini:

    [tox]
    skipsdist = true
    [testenv]
    whitelist_externals =
        /bin/bash
    commands =
        bash -c "echo $USER"

Which results in

    root@m3-17:/tmp/tox-pb# tox
    python installed: wsgiref==0.1.2
    python runtests: PYTHONHASHSEED='3044433004'
    python runtests: commands[0] | bash -c echo $USER

    ___________________________________ summary ____________________________________
    python: commands succeeded
    congratulations :)

The command launched by tox has the environment variable empty.

I'm aware that `passenv` might be used here, but the issue appeared suddenly without us changing anything in the tox.ini
Maybe the tox version changed though, but I