Stevenage missed the chance to move to within three points of Blue Square Premier League leaders Aldershot after Farsley held them to a goalless draw.
Farsley had the better chances, with Damian Reeves clean through in the first half but steering a shot wide.
Mark Arber produced a fine block to again deny Reeves before keeper Alan Julian made a superb save to keep out James Knowles' overhead kick.
Farsley keeper Curtis Aspden denied both Steve Morison and Westwood.
Farsley Celtic: Aspden, Jackson, Iqbal, Santos, McNiven, Gardner, Bentham, Knowles (Krief 81), Stamer, Reeves, Bambrook.
Subs Not Used: Watson, Grant, Whitman, Torpey.
Stevenage: Julian, Fuller, Westwood, Arber, Laird (McMahon 80), Wilson, Junior Lewis (O'Sullivan 65), Vincenti, Murray, Morison, Willock (Bramble 35).
Subs Not Used: Masters, Henry.
Booked: Bramble, Vincenti, Fuller.
Ref: G Sutton (Lincolnshire).