clazy check old-style-connect fails to execute

Run this simple example in clazy, with only the level 2 test old-style-connect enabled, and you would expect that it complains about the SIGNAL/SLOT connection with macros. However, it doesn't

#include <QApplication>
#include <QPushButton>class Foo :public QObject
{
    Q_OBJECT
public slots:
    void go() {
        qDebug("Hi");
    }
};

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);    auto cb = new QPushButton("Hi");
    auto foo = new Foo;
    QObject::connect(cb, SIGNAL(clicked()), foo, SLOT(go()));
    cb->show();
    return a.exec();
}

#include "main.moc"

Using ps -aux I found the command line Qt Creator executes, and it reveals that you include the option -I /home/blackie/Qt/5.15.1/Tools/QtCreator/share/qtcreator/cplusplus/wrappedQtHeaders

Without that option clazy correctly reports the old style connect.