You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: stub_module_method_test.rb
    path of file: ./repos/mocha/test/acceptance
    
    the code of the file until where you have to start completion: require File.expand_path('../acceptance_test_helper', __FILE__)

class StubModuleMethodTest < Mocha::TestCase
  include AcceptanceTest

  def
    
  def test_should_leave_stubbed_private_method_unchanged_after_test
    mod = Module.new do
      class << self
        def my_module_method
          :original_return_value
        end
        private :my_module_method
      end
    end