This film beats the Austrian "Tempo" (1996) in the inofficial bicycle courier film hit list by a small but still enormous margin: "Haertetest" is a story for courageous people as well as those who never take risks (like protagonist Jonas, brilliantly played by Janek Rieke) because both parts of the medal are wittily presented. Why should a boy bother about a girl? Because friends and parents say so? Or because there is something about this other person Lena (fantastic: Lisa Martinek) that is outraging, attractive, awful, hilarious, in other words: lovable? This is definitely a must-see!