"I haven't seen the game but I know we were out there having a crack tonight.
"We maybe overplayed our hands at times. We had a few errors there but we'll be better for it. We'll stay tight."
Johnson put his hand up following the five-tries-to-two defeat at GIO Stadium, taking ownership for a number of poor kicks in the first half which ran dead and released the pressure on the Kangaroos.
He said they wouldn't be changing anything ahead of the World Cup and there wasn't that much wrong with the performance.
"Adjustments, I'm not sure about adjustments," Johnson said.
"That second half, if we build off that style of footy, I genuinely believe we're going to be OK.
"It starts with your halves, controlling that and guiding that.
"But we don't need to do anything dramatic. There were some things we didn't like about tonight and some things we did."