Starting Wednesday, the Mars CVS, 58 Pittsburgh St., will begin offering drive-through COVID-19 testing.

The expansion by CVS is part of increasing testing sites ahead of a potential second wave of the virus. The pharmacy is adding more than 2,000 testing sites across the country for a total of more than 4,000 sites by mid-October.

Mars becomes one of 96 CVS locations in the state to offer COVID-19 testing. Patients must register for the test before they arrive. The self-swab tests are free to the patients.

“We recognize the critical role testing plays in helping to manage the spread of the virus and are incredibly proud of how our teams have responded to this need while continuing to take care of our customers, clients and patients,” said Jon Roberts, chief operating officer of CVS Health and acting president of CVS Pharmacy.