Motherwell were held by neighbours Hamilton Academical in a bounce game on Saturday.
Liam Donnelly and Ricki Lamie netted headers from Liam Polworth corners but, despite having the bulk of the chances, were unable to claim victory.
The hosts started the brighter and had the early chances.
Hastie’s pass into the area from the right found Polworth, who twisted away from his man and went down calling for a penalty.
With nothing given, the ball fell to Campbell whose low side-footed effort was straight at goalkeeper Fulton.
Close to the half hour mark, the visitors could have taken the lead. Ross Callachan snuck in behind the defence to latch onto a pass from the left side, and foudn himself one-on-one with Carson.
With the goal at his mercy, his shot from 15 yards brought out a stunning reflex stop from the ‘keeper.
Straight up the other end, David Turnbull thought he was sure to score after Long played him in on the penalty spot.
But Accies’ trialist defender got across him in the nick of time to stick a toe in and divert the ball away as he was set to pull the trigger.
With five minutes left in the half, Motherwell took the lead.
Polworth’s delivery from the left was to the front post, where Donnelly had steamed across the front of his man to head in to the left side of the net.
Just minutes later, Accies would ensure they’d go in at the break level.
Scott McMann found room down the left on the overlap and shot low across Carson, finding the bottom right corner at a tight angle.
O’Hara and Watt replaced Turnbull and Donnelly at the interval as Motherwell again started brighter. But they found themselves behind in the 57th minute.
McMann’s ball from the left was met by the run of substitute Marios Ogkmpoe, who managed to loop his header over Carson into the right side of the net.
Motherwell continued to press, with sub Sherwin Seedorf eager to impress with a number of efforts from a lively outing on the right side.
The Steelmen’s leveller would come with 20 minutes to go. Another Polworth corner from the left found the run of Lamie, who got between the defenders to power a header home.
There would be further half chances for Stephen Robinson’s side through Seedorf and Watt, but the fourth test of pre-season would end level.