old_contents: import _test_utilities  # initializes django
  
new_contents: import _test_utilities  # initializes django
  from django_compat_patcher.registry import get_all_fixers
  
  
  def ensure_all_fixers_have_a_test(items):
      all_fixers = get_all_fixers()
      all_tests_names = [test.name for test in items]
      for fixer in all_fixers:
          expected_test_name = "test_{}".format(fixer['fixer_callable'].__name__)
          if expected_test_name not in all_tests_names:
              raise RuntimeError("No test written for {} fixer '{}'".format(fixer['fixer_family'].title(), fixer['fixer_callable'].__name__))
  
  
  def pytest_collection_modifyitems(config, items):  # FIXME figure out how to test this...
      ensure_all_fixers_have_a_test(items)
  
subject: Add plugin to conftest.py to ensure all fixers have a test