I DO agree, that the quick test (notice the 1st word in the name is QUICK) should be as fast as possible, and as a developer, If I do make a change that might break the integrity, I will every now and then press the SLOW OLD test button. Matter of fact, I wish that the SAVE option would automatically default to YES. This would make the Quick Test even QUICKER!
BTW, while you can't turn off the launching of the browser (lucky it only happens once), you CAN at least add a line in the UIConfig.props to change the URL and/or PORT.
Bruce