Caley Thistle manager John Hughes is worried his side has been unable to see out matches without conceding.
Inverness’ 2-1 win against St Mirren on Saturday matched the score in the Scottish Cup against Partick Thistle the previous week.
In both games Inverness were 2-0 ahead, but were forced to hold on in the latter stages after failing to take several chances to win by a larger margin.
Hughes said: “I keep saying the process will take care of the outcome. But in the second half against St Mirren we never did what we should.
“We scored our second goal but then stopped playing, which was the same as the week before.
“We fell deeper and deeper, and were negative in our passing. That’s where we should step it up a gear instead of getting complacent.
“There was a little bit of trepidation. We’re going to have to look at that.
“I want a performance from the players which lasts 90 minutes.
“Good teams, when they are winning 2-0, should be turning the screw. The other team shouldn’t get a sniff of a chance.
“I’m just trying to put my finger on what went wrong and work out what we stopped doing.
“Do we think the game’s won and stop getting the ball back quick?
“I’ll look at it, but the players were outstanding in the first half of both matches and also in large parts of the second half. There were some really good performances.”
For the third consecutive match, midfielder Marley Watkins occupied the forward role vacated by leading-scorer Billy Mckay after his £150,000 move to Wigan Athletic last month.
Hughes named young forwards Ali Sutherland and Calum Ferguson on the bench on Saturday, and said both could have a part to play in Inverness’ remaining matches.
Hughes added: “We need all hands on deck. We had a couple of young players on the bench on Saturday. We go with a small squad of 18 and I’ve always said if we pick up more injuries we could struggle.
“Since I’ve come to the club I’ve always said the players on the bench are good enough to go into the team. That’s been evident with the likes of Ryan Christie, Nick Ross and Danny Williams who are now in the first-team on a regular basis.”