old_contents: from django.test import TestCase
  
  from .views import hello
  
  class View_hello_tests(TestCase):
  
      def test_hello(self):
          response = self.client.get('/')
          self.assertEqual(response.status_code, 200)
          self.assertContains(response, 'Hello, world.')
  
  
new_contents: from django.test import TestCase
  
  from .views import hello
  
  class View_hello_tests(TestCase):
  
      def test_hello(self):
          response = self.client.get('/')
          self.assertEqual(response.status_code, 200)
          self.assertContains(response, 'Hello World!')
  
  
subject: Fix tests.py For Issue #1