In that position I would highlight the lack of tests as a problem. This can be done “nicely” if required. “I know there was probably time pressure but without t

In that position I would highlight the lack of tests as a problem. This can be done “nicely” if required. “I know there was probably time pressure but without tests only the super human awesome XYZ can safely make changes and littlenold me really needs some help & protection” or done in a not so nice way “well the first thing is to finish what’s there by surrounding with tests, I’m surprised there are zero allready, it’s kind of in professional” Then concentrate on slowly but surely cover & refactor to support improvements Much safer than a rewrite IMHO