In our earlier seminars, and in our viral web papers on unit testing, we showed how most unit testing is waste. We even took the message to one of the industry's premier testing conferences: the FiSTB Assembly in Helsinki. In this follow-up seminar we look at Chapter 2 of the problems with unit testing. But, beyond that, we will show the way to use your unit test designs to drive a low-cost software quality program that will harden your software over time. By pushing testing considerations back into the design world, we can find problems earlier (during design) and can greatly reduce that problem that we all know about but never discuss: the corruption of customer data by our application.