New Hoops boss Ronny Deila takes charge of his first competitive match since replacing Neil Lennon earlier this summer when the team play in Iceland on Tuesday evening.
Deila has yet to see Celtic lose in any of their four pre-season games, and Collins is happy with the squad’s level of fitness going into the tie.
While conceding the match could be tricky for the Scottish champions, Collins feels Celtic may be able to cause problems for Reykjavik.
"Of course it is a big test but we are looking forward to it,” Collins said. "That's three weeks that we have been back now, this is the big one.
"All the preparations have gone towards getting a good performance and good result.
"We have had four matches and the squad is getting fitter every day. We want to go there and try to score goals.
"We have watched them twice, we have had videos cut up so we know their strengths and weaknesses but at the end of the day it is about how we play.
"This is where Celtic want to be, we want to be on the big stage.
"We know we have to take care of this team, it won't be easy, it never is at the start of the season but we are looking forward to it."
Despite the absence of skipper Scott Brown (hamstring) and winger James Forrest (thigh) for the tie, Collins believes Celtic have the personnel to come back from Iceland with a positive result.
"It is obviously disappointing, two big players, certainly Scott our captain and leader, but we have to get on with it now,” Collins said.
"We have lots of other good players in the squad who have to step up and show that they can do a job for the team as well and I have no doubt they will."