old_contents: from django.test import TestCase
  
  # Create your tests here.
  
new_contents: """
  This file demonstrates writing tests using the unittest module. These will pass
  when you run "manage.py test".
  
  Replace this with more appropriate tests .
  """
  
  from django.test import TestCase
  
  
  class SimpleTest(TestCase):
      def test_basic_addition(self):
          """
          Tests that 1 + 1 always equals 2.
          """
          self.assertEqual(1 + 1, 2)
  
subject: Update tests.py