The is the first and only mention that I've seen of any such change.
It's Facebook...it HAS to be true!
Villa Henson St Barts28/10/2020 > CORRECTION A Covid negative test is required 7 days after AFTER arrival. For the moment the test before departure remains at 72 hours. There is NO CONFINEMENT on St Barths. It only applies to the French Mainland. Here is a link to the https://www.journaldesaintbarth.com/, which gives out information.