如何禁用灯具？

Question

我在导轨3中编写测试单元。我包括

group :test do
  gem "factory_girl_rails", "1.0.1"
  gem "shoulda"
  gem 'mocha', '0.13.1'
  gem 'database_cleaner'
end

也创建了一些工厂。但应用程序正在加载夹具。下面是我的test_helper。

ENV["RAILS_ENV"] = "test"
require File.expand_path('../../config/environment', __FILE__)
require 'rails/test_help'
require 'shoulda'
require 'mocha'

class ActiveSupport::TestCase

    self.use_transactional_fixtures = false

    self.use_instantiated_fixtures  = false

   fixtures :all

end

请帮帮我。