In my experience, tests speed you up in the short-run too. I've run this experiment myself at my own company within different teams. Code that lacks tests has

In my experience, tests speed you up in the short-run too. I've run this experiment myself at my own company within different teams. Code that lacks tests has the most bugs, the most QA returns, the most churn, etc....we end up spending (read: WASTING) much more time and money fixing broken code that has no tests than any other code in our entire codebase.