Inverness manager Terry Butcher bemoaned the attacking display of his team in
"We got a clean sheet but overall we're very disappointed, particularly with the way we went forward," said Butcher.
"We didn't create many chances at all like we normally do and didn't play with the fluency that we do.
"If that's how we're going to play in the remaining five games then I'll be very disappointed, we're miles better than that."
Both sides are already assured a top-six spot in the Scottish Premier League and Inverness, who will qualify for the Europa League if they maintain third place or rise to second, remain five points clear of St Johnstone.
"It was a fair point," added Butcher. "We've had probably the better chances in the game, although there weren't that many.
"Fair play to St Johnstone, they are good side. They're in the top six on merit because they're hard to break down."