          else:
              expected_null_imagefield_repr = None
  
          f = OptionalImageFileForm(data={'description': 'Test'})
          self.assertEqual(f.is_valid(), True)
          instance = f.save()
          self.assertEqual(instance.image.name, expected_null_imagefield_repr)
          self.assertEqual(instance.width, None)
          self.assertEqual(instance.height, None)
  
 
</s> remove         self.assertEqual(f.is_valid(), True)
 </s> add         self.assertTrue(f.is_valid()) </s> remove         self.assertEqual(f.is_valid(), True)
 </s> add         self.assertTrue(f.is_valid()) </s> remove         self.assertEqual(f.is_valid(), True)
 </s> add         self.assertTrue(f.is_valid()) </s> remove         self.assertEqual(f.is_valid(), True)
 </s> add         self.assertTrue(f.is_valid()) </s> remove         self.assertEqual(f.is_valid(), True)
 </s> add         self.assertTrue(f.is_valid())
        self.assertTrue(f.is_valid())
          else:
              expected_null_imagefield_repr = None
  
          f = OptionalImageFileForm(data={'description': 'Test'})
        self.assertTrue(f.is_valid())
          instance = f.save()
          self.assertEqual(instance.image.name, expected_null_imagefield_repr)
          self.assertEqual(instance.width, None)
          self.assertEqual(instance.height, None)
  
keep keep keep keep replace keep keep keep keep keep
 Fixed #6103 -- Splitted tests in model_forms tests 
tests/model_forms/tests.py