Bonnaroo Music and Arts Festival has announced that its festival-goers will be required to show proof that they’ve been vaccinated for COVID-19 or tested negative for the virus within the last three days. The four-day festival in Manchester, Tennessee starts Sept. 2 after being delayed for more than a year due to the coronavirus pandemic. Bonnaroo’s announcement comes just after Chicago’s Lollapalooza music festival announced similar requirement earlier this year. Unvaccinated attendees are asked to wear masks.