Mick Schumacher, the son of seven-time Formula One world champion Michael, will double up as a Ferrari reserve driver next season while also having a regular race seat at U.S.-owned Haas.
Team boss Mattia Binotto told reporters that the 22-year-old German would be available to stand in at 11 of the record 23 scheduled races should Charles Leclerc or Carlos Sainz be unavailable.
Italian Antonio Giovinazzi, who lost his place at Swiss-based Alfa Romeo this year but has secured a drive in Formula E, will be reserve for the 12 races that do not clash with the electric series.