Originally an email sent on September 25 2017 to qa, engineering and wikitech-l mailing lists.

This is your friendly but penultimate warning that we are replacing Selenium tests written in Ruby with tests in Node.js. There will be only one more reminder, in October. In the meantime, only critical problems will be resolved in the Ruby stack. After October we will no longer maintain it.

You can follow task T139740 or Release Engineering blog for more information.

Extensive documentation is available at mediawiki.org. If you need help with the migration, I am available for pairing and code review (zfilipin in Gerrit, zeljkof in #wikimedia-releng).