Music festivals are offering to test the safety of people’s drugs, and police increasingly like the idea

MELBOURNE, Australia — When young visitors from around the world headed to Australia’s Groovin the Moo music festival in Canberra last summer, public health policy researchers were watching carefully. In a rare decision, local officials there had allowed the installation of a pill-testing facility, allowing festivalgoers to have illegal substances examined for unusual and potentially even more dangerous additives, without having to fear arrest.