I was going to write exactly the same thing, but you've put it more eloquently than I could. Also, it would seem to me that just "writing more test-cases" would

I was going to write exactly the same thing, but you've put it more eloquently than I could. Also, it would seem to me that just "writing more test-cases" wouldn't get one very far as the tests are going to be as sloppy as the original work.