old_contents: import unittest
  
  class TestStringMethods(unittest.TestCase):
  
      def test_pass(self):
          self.assertEqual(adding, 5)
  
      def test_fail(self):
          self.assertEqual(adding, 4)
  
  
  if __name__ == '__main__':
      unittest.main()
  
new_contents: import unittest
  
  class TestStringMethods(unittest.TestCase):
      
      def test_setup(self);
          pass
      
      def test_pass(self):
          self.assertEqual(adding, 5)
  
      def test_fail(self):
          self.assertEqual(adding, 4)
  
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Update main_code_tests.py