Stevenson said: "I was never worried it wasn't going to happen after the first two games. The Motherwell and Hearts games could have gone either way."
A 3-0 defeat against Caley Thistle punctured their good run and Stevenson is determined to atone at Firhill.
"We need to get back to winning ways," he said.
"It wasn't just the result, the whole performance let us down. To a man, I don't think anyone can say they played well, which is disappointing.
"I like night games, there is always a good atmosphere, especially at a traditional stadium like Thistle's.
"I have seen some of their games on the telly, the pitch looks good and it seems a good atmosphere."