Tanzania outs WHO over testing a Papaya positive for Coronavirus? Be very suspicious

At first, this is a delicious story exposing wrongdoing by WHO in Tanzania, a useful bombshell for WHO's critics.    It goes like this:  President Magifuli of Tanzania says they played a trick on WHO and sent a sample of papaya, goat and pheasant for coronavirus testing at their national and all three came back positive.

This sounds like on of those jokes that start:  An Irishman, an Englishman and a Scot walk into a bar.   You can verify, however, that President Magifuli did make the claim, but don't bet the farm yet on its truth.  He has problems of his own at home and although some lab people have been sent packing,
"The Africa Center for Disease Control and Prevention rejected claims of faulty tests by Tanzania’s president."   Wait before exploiting the story.  What technician would bother to make up a fake test reoirt for a piece of fruit?

Incidentally, although I saw this story a day earlier, search results seem suppressed on both Google and Duck Duck Go.