old_contents: from unittest import TestCase
  from gitmostwanted.app import env
  
  
  class ConfigTestCase(TestCase):
      def test_detect_proper_env(self):
          self.assertEqual(env, 'Development')
  
new_contents: from unittest import TestCase
  from gitmostwanted.app import env
  
  
  class ConfigTestCase(TestCase):
      def test_detect_proper_env(self):
          self.assertEqual(env, 'Testing')
  
subject: test typo