remove this wiki page: https://wiki.civicrm.org/confluence/display/CRM/Setting+up+your+personal+testing+sandbox+HOWTO
It comes above this one: https://docs.civicrm.org/dev/en/latest/testing/phpunit/ when I google for 'civicrm run tests'
totten says "+1 since the title of the old page was more about setup and less about phpunit, i'd lean toward redirecting to the main testing page"