old_contents: from django.db import IntegrityError
  from django.test import TestCase
  
  from ..models import Praise
  
  
  class PraiseTest(TestCase):
      def test_save_praise(self):
          praise = Praise()
          praise.to = 'Mils'
          praise.by = 'Kan'
          praise.description = 'Great work! Thanks for your patience.'
          praise.save()
  
          praise = Praise.objects.last()
  
          self.assertEqual(praise.to, 'Mils')
          self.assertEqual(praise.by, 'Kan')
          self.assertEqual(
              praise.description,
              'Great work! Thanks for your patience.'
          )
          self.assertTrue(praise.created)
  
new_contents: from django.test import TestCase
  
  from ..models import Praise
  
  
  class PraiseTest(TestCase):
      def test_save_praise(self):
          praise = Praise()
          praise.to = 'Mils'
          praise.by = 'Kan'
          praise.description = 'Great work! Thanks for your patience.'
          praise.save()
  
          praise = Praise.objects.last()
  
          self.assertEqual(praise.to, 'Mils')
          self.assertEqual(praise.by, 'Kan')
          self.assertEqual(
              praise.description,
              'Great work! Thanks for your patience.'
          )
          self.assertTrue(praise.created)
  
subject: Remove unused import :bear: