Benzema, 26, came off during the second half of Real Madrid's 4-1 extra-time win over Atletico Madrid in the UEFA Champions League final.
Yet he dismissed concerns over his injury on Friday as Didier Deschamps' men prepare for a friendly against Paraguay in Nice.
"My adductor is healing, it's much better, there's nothing to worry about," Benzema told a news conference.
"I started to run again and I work with the physios, it's evolving in the right way. Now I have to keep working but don't be worried, it's much better than against Atletico Madrid."
Benzema enjoyed a strong campaign for Real, netting 24 times in all competitions – with 17 of those goals coming in La Liga.
He hopes to set an example for his younger team-mates at the FIFA World Cup as France prepare to face Switzerland, Ecuador and Honduras in Group E.
"This season, there were good things, bad things, critics, so a lot stuff to deal with for me," Benzema said.
"I'm among the oldest in the French team and I need to be a role model for the youngest. Then I can also bring my experience in the French team.
"We're a squad, it's a really, really good squad and I think we need everybody and not only one or two players."
