A closed-door hearing in the case of Crystal Palace v Uefa, Nottingham Forest and Olympique Lyonnais will be held on 8 August, the Court of Arbitration for Sport CAS confirmed on Wednesday.
Palace were demoted to the third-tier Conference League by Uefa's Club Financial Control Body in a multi-club ownership case, while Olympique Lyonnais will be allowed to play in the Europa League.
The Eagle Football Group are majority owners of Lyon while its chairman John Textor also owns a controlling stake in Palace.
Textor later resigned from Lyon's board of directors with Michele Kang appointed chairwoman and president.
The London club appealed the decision, with the CAS now confirming it will hear the case next month.
Nottingham Forest, who finished seventh in the Premier League, will replace Palace in the Europa League if their appeal fails.