Just like everything else in the world, TDD has some disadvantages. The main ones are here:
- No silver bullet: Tests help to find bugs, but they can't find bugs that you introduce in the test code and in implementation code. If you haven't understood the problem you need to solve, writing tests most probably won't help.
- It seems slower at the beginning: If you start TDD, you will get the feeling that it takes longer to make easy implementations. You need to think about the interfaces, write the test code, and run the tests before you can finally start writing the code.
- All the members of a team need to do it: As TDD influences the design of code, it is recommended that either all the members of a team use TDD or ...