def METHOD_NAME(self):
    addon = addon_factory(summary='')
    item = DiscoveryItem.objects.create(addon=addon)
    assert self.serialize(item)['description_text'] is None
    with override_settings(DRF_API_GATES={'v5': ('l10n_flat_input_output',)}):
        assert self.serialize(item)['description_text'] == ''
    # with a lang specified
    with self.activate('fr'):
        item.reload()
        assert self.serialize(item, 'fr')['description_text'] is None
        with override_settings(DRF_API_GATES={'v5': ('l10n_flat_input_output',)}):
            assert self.serialize(item, 'fr')['description_text'] == ''