The unit has been set up on the car park of the Bewdley-based attraction in an effort to boost the national testing capacity.
The drive-through testing site, which is operated by the Department of Health and Social Care, opened on Tuesday(19) and will operate until Friday, May 22.
It will operate on an appointment-only basis.
West Midland Safari Park has been shut to visitors since March 19 in response to the Covid-19 outbreak.
A spokesman for West Midland Safari Park said: "We are proud to open our car park here at West Midland Safari Park as a mobile testing unit for Covid-19, in an effort to boost the national testing capacity.
"The drive-through test centre offers self-administered tests for essential workers on an appointment only basis.
"Those tested will receive their results within a few days.
"The site is operated by the Department of Health and Social Care and will run from Tuesday, May 19, until Friday 22nd May."