I've actually been thinking lately about property based testing for UIs. In this particularly case, there should be an invariant for each entry in a radio button list that the selectable area covers the entire bounding box from button to the end of the label. There are many such invariants you could imagine - every paragraph of text should be selectable by a click and drag, menu drop downs shouldn't hide as long as the mouse is within its area etc. Build up a big enough suite of these tests and you could quite easily integrate them in Storybook or beyond. Probably not something you want to run on every save, but an asynchronous process running somewhere recreating this "sanding" activity would be a worth way of saving time and improving quality.