esp-idf/components/mqtt/test/Kconfig

menu "ESP-MQTT Unit Test Config"

    config MQTT_TEST_BROKER_URI
        string "URI of the test broker"
        default "mqtt://mqtt.eclipseprojects.io"
        help
            URL of an mqtt broker which this test connects to.

    config MQTT5_TEST_BROKER_URI
        string "URI of the test broker"
        default "mqtt://mqtt.eclipseprojects.io"
        help
            URL of an mqtt broker which this test connects to.
endmenu