config/application.rb

application.rb

module MyApp
  class Application < Rails::Application

#...

    config.generators do |g|
      g.test_framework :rspec,
        fixtures: true,
        view_specs: false,
        helper_specs: false,
        routing_specs: false,
        controller_specs: true,
        request_specs: true
      g.fixture_replacement :factory_girl, dir: "spec/factories"
    end

#...

  end
end