  
          f = TextFileForm(
              data={'description': 'Assistance'},
              files={'file': SimpleUploadedFile('test3.txt', b'hello world')}, instance=instance)
          self.assertEqual(f.is_valid(), True)
          instance = f.save()
          self.assertEqual(instance.file.name, 'tests/test3.txt')
  
          # Instance can be edited w/out re-uploading the file and existing file should be preserved.
  
 
</s> remove         self.assertEqual(f.is_valid(), True)
        instance = f.save()
        self.assertEqual(instance.file.name, 'tests/test2.txt')

        # Delete the current file since this is not done by Django.
        instance.file.delete()
        f = TextFileForm(
            data={'description': 'Assistance'},
            files={'file': SimpleUploadedFile('test2.txt', b'hello world')})
        self.assertEqual(f.is_valid(), True)
 </s> add         self.assertTrue(f.is_valid()) </s> remove         f = TextFileForm(
            data={'description': 'Assistance'},
            files={'file': SimpleUploadedFile('test3.txt', b'hello world')})
        self.assertEqual(f.is_valid(), True)
        instance = f.save()
        self.assertEqual(instance.file.name, 'tests/test3.txt')

        # Delete the current file since this is not done by Django.
        instance.file.delete()
        instance.delete()

 </s> add  </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())
  
          f = TextFileForm(
              data={'description': 'Assistance'},
              files={'file': SimpleUploadedFile('test3.txt', b'hello world')}, instance=instance)
        self.assertTrue(f.is_valid())
          instance = f.save()
          self.assertEqual(instance.file.name, 'tests/test3.txt')
  
          # Instance can be edited w/out re-uploading the file and existing file should be preserved.
  
keep keep keep keep replace keep keep keep keep keep
 Fixed #6103 -- Splitted tests in model_forms tests 
tests/model_forms/tests.py