Albion bounced back from a duo of defeats to beat Coventry City 1-0 at The Hawthorns on Friday night.
Grady Diangana netted the deciding goal inside 15 minutes to ensure his side claimed an important Sky Bet Championship triumph.
The result lifts the Baggies up to 5th in the table ahead of this weekend’s other matches, and sees them win six consecutive home league games without conceding for the first time since 1977.
The match was chosen as Albion’s Kick It Out fixture and also dedicated to club legend Cyrille Regis, with two of his most notable former teams going head-to-head the week before his birthday.
The boss was forced into a change of goalkeeper as the injured Alex Palmer made way for David Button, and he also named new signing Marc Albrighton in his starting XI – while Nathaniel Chalobah was on the bench.
The Baggies made a blistering start in a rousing Hawthorns atmosphere, Jayson Molumby seeing an early shot blocked, Daryl Dike heading over and Jed Wallace smashing off-target.
Coventry caused panic when danger-man Viktor Gyokeres poked wide from close-range; other than that, though, it was Albion dominating play.
And they got their reward 15 minutes in, Wallace flicking Darnell Furlong’s long-throw to the back post, where Diangana was there to hammer home his fourth goal of the season.
The hosts continued to have the better of the clash, but Wallace - despite two good efforts - couldn’t convert a clever corner routine or find the bottom corner with a fantastic curled finish, ensuring it remained 1-0 come half-time.
Albion began the second period well and might have doubled their lead through Dike, however his side-footed volley was saved by Ben Wilson.
City then pressed for an equaliser, Button saving a Gustavo Hamer free-kick and Gyokeres sending a powerful strike into the Smethwick End.
And with time ticking away Corberán’s men kept holding firm. Dara O’Shea was on hand to brilliantly, and bravely, block another Hamer attempt – but the visitors didn’t really threaten again and Albion earned three important points.
Albion: Button; Furlong, O’Shea, Pieters, Townsend; Molumby, Yokuslu (Chalobah 67); Albrighton (Swift 74), Wallace, Diangana; Dike (Thomas-Asante 59).
Substitutes: Griffiths, Ajayi, Reach, Grant.
Attendance: 24,719