Rubuta ci gaba don wannan sakin layi - Testut ya shiga 2 Formula One World Championship Grand Prix, duka a Monaco, a 1958
da kuma 1959. A lokuta biyu ya tuka Maserati 250F kuma a lokuta biyu ya kasa cancanta. A shekarar 1958 ya kuma shiga motar Chiron. Ga duka direbobi biyu zai zama yunƙurin su na ƙarshe don yin tsere a Monaco. Tesnut ya yi kyau a 1958 Syracuse Grand Prix lokacin da ya yi ritaya tare da lalacewar injin lokacin da yake gudu na bakwai tare da zagaye goma don zuwa.