Drupal simpletests on BOA aegir vagrant box
Like a good little developer, I've written automated tests for my modules and distributions using the Simpletest framework. They have saved me from releasing defective code on one or two occasions. Lately, however, it's become increasingly complicated to get those tests to run on my BOA Aegir Vagrant dev environment. So, I'm writing these notes to remind myself what to do.
tl;dr: Disable open_basedir for PHP and turn off Redis and Speed Booster caching.