It is quite unlikely that a regulator will ask you for proof you have a unit test for anything (also, that's not what a unit test is - see [1] for a good summar

It is quite unlikely that a regulator will ask you for proof you have a unit test for anything (also, that's not what a unit test is - see [1] for a good summary of why). It _is_ likely a regulator will ask you to prove that you are developing within the quality assurance framework you have claimed you are, though. Finally though, logs are not an audit trail, and almost no-one can prove their logs are correct with respect to the state of the system at any given time. [1]: https://www.youtube.com/watch?v=EZ05e7EMOLM https://www.youtube.com/watch?v=EZ05e7EMOLM