My wife can't seem to be able to plug anything into her bathroom outlet without somehow hitting the test button and tripping the GFCI outlets. That would not usually bother me except that my 3D printer is on that same circuit!!! Very frustrating to be into 15 hours of a print and have the power removed unnecessarily. So anyway, made this little guard for the test button. Has a hole in the center so you can still work the button with a thin object if needed. Used the Dremel to make a couple of slots in the wall plate to fit the modification. For this outlet I have, the face with the hole on the modification is 37mm wide the inner measurement is 33mm. In case anyone should need to print this so you can check if your working with the same size GFCI outlet.