I didn&#x27;t do a lot of tests in my last work, but had a pretty good system. It was in house, so didn&#x27;t matter so much if the odd bug slipped past.<p>I just changed job, and the system I have inherited doesn&#x27;t seem to have much in the way of automated testing at all, but it works, and it runs. The logging is really thorough which helps a lot. The bugs I have encountered far wouldn&#x27;t be caught by tests.