QPlainTextEdit hides blank lines for certain Fonts

#include <QApplication>
#include <QPlainTextEdit>

int main(int argc, char *argv[])
{
    QApplication a(argc, argv);
    QFont font("DejaVu Sans");
    QPlainTextEdit edit;
    edit.setFont(font);
    edit.setPlainText("test\n\ntest\n");
    edit.show();
    return a.exec();
}