The France international underwent a medical in Turin on Thursday at the J-Medical centre.
Kolo Muani entered the building in the morning and spent six hours undergoing tests before re-emerging to sign autographs for waiting Juve fans in the carpark.
The striker will join Juve in a straight loan without a permanent option included.
Instead, reports TMW, the two clubs have agreed to return to the negotiating table at the end of the season to consider a fee for the player's outright transfer.