A black market for negative COVID-19 tests has popped up across the globe as more countries require travelers to prove their negative status before entering, a report said Wednesday.

In France, seven people were arrested last week for allegedly hawking doctored coronavirus tests at Charles de Gaulle International Airport, The Associated Press reported. The suspects, who were not identified, were charging up to $360 for the fake tests.

Authorities tracked the ring down after finding a man bound for Ethiopia with a fake test, according to the report. The alleged scammers face up to five years in prison if convicted.

In South America, Brazilian officials arrested four tourists who gave fake tests after they flew into an island chain off the coast of the country that requires travelers to show negative test results.

Read more at NY Post.