old_contents: import os
  
  
  def load_tests(loader, standard_tests, pattern):
      """
      This function is needed by the load_tests protocol described at
      https://docs.python.org/3/library/unittest.html#load-tests-protocol
  
      The tests in this module are only added under Python 2.
      """
      standard_tests.addTests(loader.discover(os.path.dirname(__file__), pattern=pattern))
      return standard_tests
new_contents: import os
  import six
  import unittest
  
  
  def load_tests(loader, standard_tests, pattern):
      """
      This function is needed by the load_tests protocol described at
      https://docs.python.org/3/library/unittest.html#load-tests-protocol
  
      The tests in this module are only added under Python 2.
      """
      if six.PY2:
          standard_tests.addTests(loader.discover(os.path.dirname(__file__), pattern=pattern))
          return standard_tests
      else:
          return unittest.TestSuite()
  
subject: revert configversioncontrol test runner to use six