How do I display the full text on the Qtabbar label?

Question

I want to display like picA but now it's like picB ,

here is my stylesheet

QTabBar:tab {  
    background-color: #2D2D2D;
    color: #969696;
    font: 9pt "Courier New";
    padding: 15px;
}
QTabBar:tab:selected {  
    background-color: #1E1E1E;
    color: #FFFFFF;
    font: 9pt "Courier New";
    padding: 15px;
}