Maintain As Usual

I've been looking at Fit (FrameworkForIntegratedTest) lately, and one phrase in the instructions really struck me: Maintain As Usual. I realized that I have tendency to consider some aspects of the project to be SecondClassCode?. "Why OnceAndOnlyOnce it, it's just /user interface code/temporary/test code." So far, I've never been correct to treat code that way, my life would always have been simpler if I remembered to MaintainAsUsual.