He trained under supervision of Tractor goalkeeping coach Mladen Zganjer on Wednesday.
The 27-year-old custodian played for Bundesliga 2 side Eintracht Braunschweig last season.
Johansson replaces Alireza Beiranvand, who has been banned for four months.
Johansson has played for Sweden’s U-17, U-19, and U-21 football teams.