The former Rangers and Charlton striker is on the lookout for a new club after being released by the Easter Road outfit.
The Finland international has been training with St Johnstone and the 34-year-old says McInnes is looking closely at his skills.
Johansson, who spent three years at Rangers until 2000, admits he loves Scotland and is not looking to leave.
"When I arrived at Rangers, Derek McInnes looked after me and he's still doing it now," explained Johansson. "I want to play against Wales and Germany next month and Derek has given me a chance to keep fit.
"I see Scotland as my home now and it would take something special to make me leave."