old_contents: import json
  import unittest
  
  from datetime import datetime, timedelta
  
  from eventify.service import Service
  
  class TestDrivers(unittest.TestCase):
  
      def setUp(self):
          pass
  
      def test_load_driver(self):
          service = Service(config_file='test/config-test.json')
  
new_contents: import json
  import unittest
  
  from datetime import datetime, timedelta
  
  from eventify.service import Service
  
  class TestDrivers(unittest.TestCase):
  
      def setUp(self):
          pass
  
      def test_load_driver(self):
          service = Service(config_file='test/config-test.json', callback=self.test_load_driver)
  
subject: update drivers