Coronavirus testing schedule for Prince William area residents Free COVID-19 testing is available for anyone who lives or works in Prince William County, the City of Manassas, or the City of Manassas Park. Participants must provide their full name, telephone number, and a home or work address in Prince William County, the City of Manassas, or the City of Manassas Park to obtain COVID testing and receive the results. Here is a list of the upcoming testing sites and locations. All sites can accommodate drive-thru or walk-up testing. To ensure you receive a test please arrive at the site as close as possible to the start time. Testing is only available until the allocated test kits are depleted at each site.