Watford have confirmed Spanish side Real Sociedad will come to Vicarage Road to contest the Graham Taylor Trophy on August 5.
Taylor, who died on January 12 aged 72, had two spells in charge of the Hornets.
He guided the Hertfordshire club to runners-up in the top flight in 1982-83 and also the 1984 FA Cup final.
Taylor then went on to take Watford up to the Premier League in 1999.
As well as managing Aston Villa and Wolves, Taylor also had a spell in charge of the England national team.