Houston ? The international space station’s giant new handyman robot got its first checkup on Sunday, with astronauts and flight controllers testing its electronics, joints and brakes.

The Canadian-built robot, named Dextre, passed all but one of the tests. One of the wrist joint brakes in Dextre’s left arm slipped a tiny bit more than engineers wanted, but Canada’s acting space station program manager said he wasn’t too concerned. The brakes help hold the arm steady.

“In the long term it’s not going to affect the operation of Dextre in any significant way,” Pierre Jean said at the mission control center.

Astronauts and flight controllers planned to test the brake a couple more times in hopes that it slips less as it gets more worn in, Jean said.

Two astronauts plan to take a spacewalk tonight to add a tool holster and other accouterments for Dextre. When the robot is fully assembled, it will stand 12 feet and have a mass of 3,400 pounds.