Do your developers do unit testing, system testing, or even worse the so called "continuous test"? Just tell them this redundancy will not be tolerated. It is a waste of time. If you skip those tests then the customers will find those bugs for free! Don't be foolish and turn down this free labor!
(The owners of everythingsysadmin.com apologize for the above message. Tom was replaced by an evil pointy haired boss Tom. Evil Tom was wrestled to the ground and the real Tom has taken back control of the keyboard. Please disregard the above message.)
You might want to read this instead: http://www.leanessays.com/2011/01/tale-of-two-terminals.html