Dorrans will stay in the first-team frame at the Hawthorns after signing a new and improved three-year contract.
He said: "I'm happy to get my new contract finalised. We've been in talks for a couple of months and I'm glad to get it over the line.
"I'd like to thank my agent and the club for getting it sorted out. I've enjoyed my six years at Albion, I'm looking for a testimonial now!
"It's been a good six years and that's the reason why I've signed the extension. I'm looking forward to getting going now for the new season.
"It was a difficult start for me last season but it was about getting in the team and staying in there, that's what I'm hoping to do again this year.
"I'm aiming to get in at the start of this season and stay in the team for the rest of the campaign."
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