In his seventh international match - his first five were in the 2020-21 season - Johansson scored both the 1–0 and 2–0 goals in the Beijer Hockey Games match in Ängelholm.
It was Johansson's second and third goals for the national team.
Jacob De La Rose made it 3-0 in an empty net with seconds left in the game.
"I'm happy and really like the mentality," said national captain Sam Hallam to SVT after the match.
Sweden played significantly better on Saturday against World Cup host Switzerland than it did against the Czech Republic on Thursday, when the score was 1–3.
Goalkeeper Magnus Hellberg saved all 25 shots.
The tournament ends with a match against Finland on Sunday. The World Cup begins on Friday.
