i always test myself for COVID-19 on the two days i need to report to the office. it's not a mandatory thing, but if the result of my self-test is invalid (no line or faint line) or positive (two lines) then i have an excuse to work from home. but so far since the pandemic, i've always tested negative (one line).
@grammyn - no, i don't want to get COVID. but i prefer to work from home and not be subjected to the shenanigans of commuters and other people out there!