old_contents: """
  For tests that require python 3 only syntax.
  """
  import six
  
  if six.PY2:
      # don't import this package on python2
      def load_tests(loader, standard_tests, pattern):
          return standard_tests
  
new_contents: """
  For tests that require python 3 only syntax.
  """
  import sys
  
  if sys.version_info < (3, 6):
      # These tests require annotations
      def load_tests(loader, standard_tests, pattern):
          return standard_tests
  
subject: Fix python 3.5 test switching.