silence standard output during RSpec runs

spec/lib/generators/testing_framework_adapter_generator_spec.rb

@@ -3,13 +3,15 @@ require 'generators/testing_framework_adapter_generator'
 require 'rails_helper'
 
 describe TestingFrameworkAdapterGenerator do
+  include Silencer
+
   describe '#create_testing_framework_adapter' do
     let(:name) { 'TestUnit' }
     let(:path) { Rails.root.join('lib', "#{name.underscore}_adapter.rb") }
     let(:spec_path) { Rails.root.join('spec', 'lib', "#{name.underscore}_adapter_spec.rb") }
 
     before(:each) do
-      Rails::Generators.invoke('testing_framework_adapter', [name])
+      silenced { Rails::Generators.invoke('testing_framework_adapter', [name]) }
     end
 
     after(:each) do