Two free coronavirus test sites that don't require an appointment are open in San Antonio through Saturday. The test sites are a joint effort of Metro Health and the San Antonio Fire Department. The sites will be open from 9 a.m. to 5 p.m. today through Saturday in the parking lot of the Las Palmas Library on Castroville Road, and Woodlawn Lake Park on Cincinnati Avenue. Several state agencies are also making free mobile test sites and dates available to local residents.