At least not for install and uninstall. So we can fix all of them in a follow-up.

https://github.com/whimboo/mozmill-automation/blob/e2d9a1348af50b4d8777e3681e7d0d4918422681/mozmill_automation/testrun.py#L151
https://github.com/whimboo/mozmill-automation/blob/e2d9a1348af50b4d8777e3681e7d0d4918422681/mozmill_automation/testrun.py#L280