Are test fixtures worth it in your automated testing strategy?

Building automated tests for green field projects is a breeze.

Or at least…it’s not as hard as taking code written by someone not even on the team anymore, and attempting to test it.

Legacy systems can make you sweat. Raise your hand if you know EXACTLY what I’m talking about. (And raise two hands if that part of the system gives you nightmares from time to time!)

Have you invested any time in coding test fixtures to automate your tests? Or do you work at one of those shops…