QHeaderView expands column beyond the maximum size

#include <QtWidgets>

int main(int argc, char *argv[])
{
    QApplication app(argc, argv);
    QStandardItemModel model;
    QWidget window;
    QTreeView *tree = new QTreeView(&window);

    model.setColumnCount(2);
    model.setItem(0, 0, new QStandardItem("test 1"));
    model.setItem(0, 1, new QStandardItem("test 2"));
    model.setItem(1, 0, new QStandardItem("This is a very very long text that cannot fit into the window"));
    model.setItem(1, 1, new QStandardItem("test 3"));

    QHBoxLayout *layout = new QHBoxLayout;
    layout->addWidget(tree);
    window.setLayout(layout);

    tree->header()->setMaximumSectionSize(150);
    tree->setModel(&model);

    window.show();

    return app.exec();
}