QToolbutton text overlapping menu button

Question

When having a long text applied to a QToolbutton it overlaps the menu button for the right click menu like the following:

The code for the Button

TestWindow::TestWindow(QWidget *parent) :
    QMainWindow(parent),
    ui(new Ui::TestWindow)
{
    ui->setupUi(this);

    QMenu *menu = new QMenu();
    QAction *testAction = new QAction(QLatin1String("testAction"), this);
    menu->addAction(testAction);

    ui->toolButton->setMenu(menu);
    ui->toolButton->setText(QLatin1String("This is a long Text that should not overlap"));
    ui->toolButton->setPopupMode(QToolButton::InstantPopup);
}

The toolbutton is just part of a horizontal layout of the central widget.

Is there an easy way to prevent this by e.g. cropping the text?