They are alleged to have conspired to bet on Mr Hester being booked almost a week before the Betfred League Cup tie between Elgin City and Hibs on 26 July 2019.
They deny forming a fraudulent scheme to obtain money "by placing bets that Kane Hester would receive a booking by the referee during the match" at Borough Briggs Stadium in Elgin.
The quartet are alleged to have agreed before the group stage match that "Kane Hester would purposely commit a foul during the course of the match and receive a booking from the referee."
They are alleged to have placed five separate bets on Mr Hester being booked, and he is alleged to have been shown a yellow card for stamping on a Hibs player.
An alternate version of the charge alleges they cheated at gambling by placing five bets on Mr Hester being booked and that he was shown a yellow card for a foul, leading to them falsely obtaining £13,583.32 in winnings.