A lateral flow test or something using a lab?
Must be a lab test as lateral flow is like £2:
https://www.boots.com/flowflex-antigen-rapid-test-lateral-flow-self-testing-kit-1-test-10312288
Or $7 in Walmart: https://www.walmart.com/ip/Flowflex-Covid-19-Antigen-Home-Test-1-Test/837992467?classType=VARIANT&athbdg=L1200
Nose swab into a piece of lab equipment about the size of a bread toaster. They put the swab into the thing right in front of me but I didn’t note any further details about the equipment.
I went in for strep testing (which is what it ended up being). They advised covid test too due to local outbreak, I predicted that they might so had done some prep research and thought I could expect a much lower bill.
Lesson learned, avoid getting tested for covid 😂