self = <test_prometheus.TestRemoteWrite testMethod=test_remote_write>

    @unittest.skipUnless(metricbeat.INTEGRATION_TESTS, "integration test")
    def test_remote_write(self):
        """
        prometheus remote_write test
        """
        self.render_config_template(modules=[{
            "name": "prometheus",
            "metricsets": ["remote_write"],
            "period": "5s",
            "host": "localhost",
            "port": "9201"
        }])
        proc = self.start_beat()
    
        self.wait_until(lambda: self.log_contains("Starting HTTP"))
    
>       self.wait_until(lambda: self.output_lines() > 0, 60)

module/prometheus/test_prometheus.py:88: