old_contents: from celery import task
  
  
  @task()
  def add(x, y):
      """ Test task. """
      return x + y
  
new_contents: from celery import task
  
  
  @task()
  def add(x, y):
      """ Test task. """
      return x + y
  
  
  @task()
  def run_tests(test_id):
      """
      A task that actually runs the API testing.
  
      First it copies the test data to the run history tables, then runs the
      tests.
  
      """
      # TODO
      pass
  
subject: Add test runner task stub