old_contents: from django import test
  
  from ievv_opensource.ievv_sms.backends import debug_dbstore
  from ievv_opensource.ievv_sms.models import DebugSmsMessage
  
  
  class TestBackend(test.TestCase):
      def test_sms_record_is_created_in_db(self):
          debug = debug_dbstore.Backend(message="Hi there!",phone_number="1234567")
          debug.send()
          self.assertEqual(
              DebugSmsMessage.objects.first().message,
              "Hi there!")
          self.assertEqual(
              DebugSmsMessage.objects.first().phone_number,
              "1234567")
  
new_contents: from django import test
  
  from ievv_opensource.ievv_sms.backends import debug_dbstore
  from ievv_opensource.ievv_sms.models import DebugSmsMessage
  
  
  class TestBackend(test.TestCase):
      def test_sms_record_is_created_in_db(self):
          debug = debug_dbstore.Backend(message="Hi there!", phone_number="1234567")
          debug.send()
          self.assertEqual(
              DebugSmsMessage.objects.first().message,
              "Hi there!")
          self.assertEqual(
              DebugSmsMessage.objects.first().phone_number,
              "1234567")
  
subject: Fix PEP8 error.