The Irishman was happy enough with his side's performance in Monday night's goalless draw against Aberdeen at Easter Road with the clean sheet being the "most pleasing aspect" of a game in which the home side created most of the chances that were missed.
However, Fenlon stressed to his players that the William Hill Scottish Cup final against Celtic at Hampden next month should keep them motivated, as well as aiming to finish the best of the rest in the bottom six.
He said: "We have so much to play for.
"We want to finish seventh, we still have Hearts to play and we have a cup final to look forward to so it shouldn't be difficult for anyone to keep themselves focused.
"And if they want to play in the cup final then, if they get the chance to play, then they give their all and get to the levels that we want.
"It wasn't a classic game but I think we shaded it on chances.
"Their keeper made a great save from Leigh [Griffiths] late on and Eoin Doyle hit the post.
"We had been conceding too many goals, three last week, three the game before that and four the week before that, so it was important that we got back to defending well, so that was probably the most pleasing aspect."