@SBisson asked how to run the browser tests on SauceLabs, I eventually found a documentation on the wiki at https://www.mediawiki.org/wiki/Quality_Assurance/Browser_testing/Running_tests#Running_browser_tests_at_Sauce_Labs
export SAUCE_ONDEMAND_USERNAME=(username) export SAUCE_ONDEMAND_ACCESS_KEY=(key)
It does not show up on the mediawiki-selenium ruby gems doc though: https://doc.wikimedia.org/rubygems/mediawiki-selenium/