Nissany had his first experience with a Formula One car in October 2014, testing the Sauber C31 at the Circuito Ricardo Tormo. In December 2019, he took part in post-season testing with Williams at Yas Marina Circuit. In January 2020 it was announced that Williams had appointed Nissany as their official test driver for the season. He made his Grand Prix weekend debut at the , taking part in the first practice session (FP1) for the team. He later appeared in FP1 sessions at the Italian and Bahrain Grands Prix, as well as representing Williams at the post-season young driver test at Yas Marina Circuit.