Test - seeking one thing to learn about it; "a sample for 10 times totally free trial"; "a trial of progesterone failed to relieve the pain" litmus test - a test that relies on an individual indicator; "her litmus test forever breeding is whether or not you split infinitives" According https://da-li.de/mahroboter-die-effiziente-losung-fur-den-perfekten-rasen/