 The format of a test match series varies; for instance it can be a head-to-head between one of the worse finishers of the higher league and one of the better finishers of the lower league, or it can be a mini league where all participants play each other or teams only play those from the other league.The winner of the test match series play in the higher league the following season, and the loser in the lower league.In international football, playoffs were a feature of the 1954 and 1958 FIFA World Cup final tournaments.