All of the Browns' test results were also negative for the second consecutive day.
Quarterback Baker Mayfield (rib) and wide receiver Jarvis Landry (hip/rib), who were both questionable to play in Week 6 along with Beckham, will play in the AFC North showdown, a source told Tom Pelissero of NFL Network.
Beckham was sent home from the team's facility on Thursday due to an illness, but he returned Saturday and participated in a walk-through, Cabot adds.
Browns head coach Kevin Stefanski told the media Friday that the receiver was "doing better," according to Nate Ulrich of the Akron Beacon Journal.
The 4-1 Browns will count on Beckham's presence as they prepare to face the 4-0 Steelers in a crucial AFC North showdown.
The 27-year-old has recorded 21 receptions for 294 yards along with three touchdowns this season.