The Seasiders will face Brighouse on Saturday, 6th August, with a 3pm kick-off.
Last season, Brighouse finished seventh in the Pitching In Northern Premier League Division One East, nine points adrift of the league's play-off spots.
Whitby have already confirmed six pre-season friendlies:
Handsworth (H) - Saturday, 9th July @ 3pm
Bishop Auckland (A) - Saturday, 16th July @ 3pm
Middlesbrough XI (H) - Wednesday, 20th July @ 7:30pm
Stockton Town (A) - Saturday, 23rd July @ 3pm
Guisborough Town (H) - Tuesday, 26th July @ 7:30pm
Darlington (H) - Saturday, 30th July @ 12:30pm