text: from django.core.management import call_command
  from django.test import override_settings
  
  from .test_base import MigrationTestBase
  
  
  class Tests(MigrationTestBase):
      """
      Deprecated model fields should still be usable in historic migrations.
      """
      @override_settings(MIGRATION_MODULES={"migrations": "migrations.deprecated_field_migrations"})
      def test_migrate(self):
          # Make sure no tables are created
          self.assertTableNotExists("migrations_ipaddressfield")
          # Run migration
          call_command("migrate", verbosity=0)
          # Make sure the right tables exist
          self.assertTableExists("migrations_ipaddressfield")
          # Unmigrate everything
          call_command("migrate", "migrations", "zero", verbosity=0)
          # Make sure it's all gone
          self.assertTableNotExists("migrations_ipaddressfield")
  