Although this logic looks a little strange at this low level, it's the best location within the Upgrades code for it to happen.
Fixes#31811
git-svn-id: https://develop.svn.wordpress.org/trunk@31936 602fd350-edb4-49c9-b593-d223f7449a82
wp-tests-config.php can/should reside in the root of a develop checkout. `phpunit` should be run from the root.
see #25088.
git-svn-id: https://develop.svn.wordpress.org/trunk@25165 602fd350-edb4-49c9-b593-d223f7449a82