We find that Claude is really good at test driven development, so we often ask Claude to write tests first and then ask Claude to iterate against the tests
Time to actually read Test-Driven Development By Example, my friend. Or if you can't stomach reading a whole book, read this: https://tidyfirst.substack.com/p/canon-tdd
TL;DR - If you're writing more than one failing test at a time, you are not doing Test-Driven Development.