Last modified: 2011-09-18 18:04:17 UTC
The two tests testing wgTitle to be 'BlankPage' fail in wikis where the localized name of this special page is different. Please change it to wgCanonicalSpecialPageName or something else that is the same in all wikis.
Thanks for reporting this, I'll fix this together with other small mw.util.test changes tonight.
Fixed in r87360.