Note sure why this failed. It works fine for me locally.... It's strange as the screenshot shows it got to the preview screen. Maybe the loader disappeared too fast?!
FAILURE: MobileFrontend-en.m.wikipedia.beta.wmflabs.org-linux-firefox Build #336 (Fri, 07 Feb 2014 06:28:34 +0000)
Test Result
1 failed, 7 skippedFailed Tests
Test Name Duration Age Encourage new users to Keep Going.I see a KeepGoing message after completing my VisualEditor edit 1 min 41 sec 6 All Tests
Package Duration Fail Skip Total (root) 25 min 1 7 61