It's like that "broken window" anecdote from The Pragmatic Programmer's Guide...

A neighborhood starts to suck once there's a broken window no one is fixing. You see the broken window and after a while you just start to think "what a lousy neighborhood". So, if you have a broken window, and you care about it, you should go out of your way to fix it.

Fix the leak in the toilet. Get the bad tooth filled. Get your self tests running again.