async def METHOD_NAME(
    proxy: DBusInterfaceProxy, test_service: TestInterface
):
    """Test dbus proxy connect."""
    assert proxy.is_connected
    assert proxy.properties["TestProp"] == 4
    test_service.emit_properties_changed({"TestProp": 1})
    await test_service.ping()
    assert proxy.properties["TestProp"] == 1
    test_service.emit_properties_changed({}, ["TestProp"])
    await test_service.ping()
    await test_service.ping()
    assert proxy.properties["TestProp"] == 4