This spec was failing due to using :es as the default_locale in application.rb[1], but using :en as the default_locale in the test environment[2] The fallback rules where getting a little confused and not including the default locale, for the test environment, in the fallback rules With this commit we are making sure that rule is created, as it would in a production environment that uses the default_locale in application.rb [1] https://github.com/AyuntamientoMadrid/consul/blob/master/config/application.rb#L22 [2] https://github.com/AyuntamientoMadrid/consul/blob/master/spec/rails_helper.rb#L15