Fix a rare spec failure on Rubinius and probably JRuby.
Fix a rare spec failure on Rubinius and probably JRuby.

godfat/que,chanks/que,gocardless/que,heroku/que,goddamnhippie/que,joevandyk/que,zloydadka/que,gocardless/que,brandur/que,hardbap/que