def METHOD_NAME(self, api, config, fb_marketing):
    config["custom_insights"] = [
        {"name": "test", "fields": ["account_id"], "breakdowns": ["ad_format_asset"], "action_breakdowns": ["action_device"]},
    ]
    config = ConnectorConfig.parse_obj(config)
    assert fb_marketing.get_custom_insights_streams(api, config)