async def METHOD_NAME(
    device_unmanaged_service: DeviceService, dbus_session_bus: MessageBus
):
    """Test unmanaged interfaces don't sync properties."""
    interface = NetworkInterface("/org/freedesktop/NetworkManager/Devices/35")
    await interface.connect(dbus_session_bus)
    assert interface.managed is False
    assert interface.connection is None
    assert interface.driver == "veth"
    assert interface.sync_properties is False
    device_unmanaged_service.emit_properties_changed({"Driver": "test"})
    await device_unmanaged_service.ping()
    assert interface.driver == "veth"