The RTEST symposium aims at bringing researchers in the fields of real-time and embedded systems and related research areas, from both industry and academia together. This event was held as a national-only event from 1995 to 2014. Starting from 2015, RTEST became a successful international symposium, and the 2020 edition accepts only submissions in English. RTEST 2020 will be held on June 10-11, 2020 at the Institute for Research in Fundamental Sciences (IPM), (School of Computer Science), Tehran, Iran.