Johnson though believes there's far more to come from his side in the coming weeks.
"It's one of those funny games. We're happy with the end result, we are, but not happy with a lot of the process," he said.
"I was really glad that we came out after half-time and got the early tries, it took the pressure off us.
"We were getting frustrated in the first half, so it was a nice sign at the start of the second half that we could switch back on and get the job done that we came here to do.
"It all bodes well for the future, and I think Benetton Treviso will get a lot more than the one win in the season, so we're quite glad that we've got it tonight and we'll take the points while we can."