This is partially a trial run for the a11y review checklist. I think the best process would be:

• run and check off any tests that you're comfortable running solo
• if any test instructions are hard to parse or incomplete, make a note of them
• either pair for the remaining tests, or I'll do a pass on the remaining ones separately

I've intended for this to include all button variants, including CompoundButton, MenuButton (minus the Menu itself), SplitButton, and ToggleButton. If it's easier to split out, we can create separate issues for each.