Albion shared a goalless draw with Reading at the Madejski Stadium on Easter Monday.
Rekeem Harper and Jay Rodriguez came closest to settling the Sky Bet Championship encounter, the former sending a fierce long-range strike crashing against the underside of the crossbar before the latter struck a post in injury time.
Sam Johnstone produced an excellent fingertip save to push away Lewis Baker's late free-kick and seal a clean sheet as both sides claimed a share of the spoils in sunny Berkshire.
The point, from the club's first league stalemate of the season, makes certain of fourth-placed Albion's place in the Play-Offs.
It also extends their unbeaten run to three matches heading into Saturday's final home game of the regular season against Rotherham United.
Caretaker Head Coach Jimmy Shan made five changes from the Good Friday triumph over Hull City, with recalls for Conor Townsend, Tosin Adarabioyo, Sam Field, Jacob Murphy and Rodriguez.
Yet it was the Royals who were forced to make two substitutions inside the opening 13 minutes due to injuries.
It was a quiet opening period, with neither goalkeeper forced into a stop of note until Hal Robson-Kanu and Murphy both brought saves out of Emi Martinez midway through the first half.
Ovie Ejaria dragged an effort across the face of goal shortly after the half-hour mark as it remained goalless at the interval.
Johnstone was called into action to parry from substitute Danny Loader following the restart before Robson-Kanu headed wide against his former club at the other end.
A flowing Albion move saw Harper send a first-time strike from distance crashing against the underside of the bar in the 59th minute.
Matt Phillips and Chris Brunt were introduced soon afterwards as Albion pushed for a breakthrough.
Loader sent a header straight at Johnstone as the clash remained goalless heading into the final 20 minutes.
Johnstone then made a superb fingertip save to keep out Baker's 80th-minute free-kick, before the hosts saw penalty appeals waved away when Garath McCleary went to ground in the latter stages.
And it was left for Reading keeper Martinez to make sure it finished all square in injury time, saving from Rodriguez and Phillips as the former also struck the woodwork.
Albion: Johnstone, Adarabioyo, Dawson, Bartley (c), Holgate (Phillips 61), Harper, Field (Brunt 66), Townsend, Murphy, Robson-Kanu (Gayle 83), Rodriguez.
Subs: Bond, Gibbs, Mears, Hoolahan.
