And the group, which now numbers 15, will be facing the court without legal representation.
The Nauru 19 were involved in an anti-government protest in June 2015 and have been put through a convoluted legal process ever since.
Last year, an Australian appointed as judge, Justice Geof Muecke, granted them a permanent stay, saying the group's judicial rights had been abused by the then Nauru Government.
The government had refused them proper legal aid and placed them on a blacklist, ensuring they would struggle to find work.
