McArthur, who signed a new deal last week with the club, enjoyed finding the back of the net for the 2-1 triumph.
"The first one in a while and hopefully I can add a few more," he said.
"It was a good test for us. Obviously, we were quite rusty at times; we need to try and get that sharpness back. But that's why you've got these games to try and get that."
Asked about how different this pre-season will be in comparision to the regular schedule, McArthur suggested it will be easier to become match-ready.
He told the club's website: "You're going to need to get up to speed a lot faster," he admitted. "With only having three weeks off, you should be able to do that. But when you do take that break, it is always tough in the first game."