Comment by bumby

I'd argue that the point Goodhart's law isn't that metrics are bad, but that all metrics aren't created equal. In the case above, it seems like the real goal was improved code quality. Number of unit tests isn't the best proxy for that goal, so it wasn't the best choice of metric. You don't want developers creating tests for the sake of creating tests. (There's some irony here in that it's not the type of behavior I'd ascribe to professionals). The "solution" is a metric that's a better measure of what you actually want.