def test_region(self):
        regions = Region.objects.all()[:2]
        params = {'region_id': [regions[0].pk, regions[1].pk]}
        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)
        params = {'region': [regions[0].slug, regions[1].slug]}
        self.assertEqual(self.filterset(params, self.queryset).qs.count(), 2)