FRAMINGHAM — A free walk-up COVID-19 test site in downtown Framingham will close after Wednesday because the city's contract with the testing provider is expiring. The test site, at the South Middlesex Opportunity Council on Bishop Street, was originally operated by the state through Gov. Charlie Baker's Stop The Spread initiative. But Framingham recently took over management of the site after the state closed the Bishop Street location in favor of opening a high-throughput, appointment-only, drive-through test site at 484 Franklin St. The city used CARES Act funding to contract with testing provider Transformative Healthcare to keep the walk-up site running after a brief closure. The site — open only to Framingham residents — has been especially useful for those who need tests urgently and those who don't have access to a vehicle, the latter of which is required to be tested at the Franklin Street site.