code: def finalize(self, result=None):
          
          if not self.settings_path:
              # short circuit if no settings file can be found
              return
  
          from django.test.utils import teardown_test_environment
          from django.db import connection
          from django.conf import settings
  
          self.call_plugins_method('beforeDestroyTestDb', settings, connection)
          try:
              connection.creation.destroy_test_db(
                  self.old_db,
                  verbosity=self.verbosity,
              )
          except Exception:
              # If we can't tear down the test DB, don't worry about it.
              pass
          self.call_plugins_method('afterDestroyTestDb', settings, connection)
  
          self.call_plugins_method(
              'beforeTeardownTestEnv', settings, teardown_test_environment)
          teardown_test_environment()
          self.call_plugins_method('afterTeardownTestEnv', settings)
docs: Clean up any created database and schema.