Undisabable warning during cucumber tests

[mayatskiy]

I have a "You are running a production build of Ember on localhost and won't receive detailed error messages. If you want full error messages please use the non-minified build provided on the Ember website." message in console during cucumber tests.

But I have config.ember.variant = :development it test.rb config.

How I can disable this message?

ember-rails (0.15.0)
ember-source (1.6.1)
ember-data-source (1.0.0.beta.8)