The PGA Tour announced on Monday that is has extended its partnership with Sanford Health to provide on-site COVID-19 testing of players, caddies and essential personnel.

Sanford Health has managed all testing efforts since the PGA Tour returned to competition last June at the Charles Schwab Challenge in Texas. It has conducted more than 18,500 tests from its three mobile laboratories.

“With health and safety continuing to be our No. 1 priority, we are thrilled to extend this game-changing partnership with Sanford Health, utilizing their expertise in testing players, caddies and essential personnel,” said Andy Levinson, a senior vice president of tournament administration for the Tour.

Sanford Health’s technicians administer between 500-700 tests each week.

This week’s Arnold Palmer Invitational is expected to allow up to 8,000 fans per day on site at Bay Hill Club and Lodge.