Ben, I'm not sure you know why it makes sense to test lenses at least semi-formally. The main point of doing it is to find out whether a newly-arrived lens is good enough to use. A secondary but still important point is to decide whether the newly-arrived lens is better than the equivalent lens in hand. Which to use, which to move out.
All but one of my lenses are marque Canon FD ones, the exception is a Tamron SP 17mm f3.5 I'm more than satisfied with all of them I have enough lenses for this lifetime and since I have no intention of buying any more and see no reason to potentially make myself unhappy by shooting test charts with them.
I test lenses by shooting pictures with them, I've had the majority of my lenses for more than thirty years and they are still better optics than I'm a photographer, I have no inclination to start shooting test targets with them and to make a stick to beat myself with.
I recently acquired my first medium format folding camera. Since I plan on using it for landscapes and other scenic shots, I plan on testing it against my known medium format landscape camera, a Fuji rangefinder. This thread has been a big help to me.