The announcement was made after new chief selector Ed Smith met with national head Trevor Bayliss, fellow selectors Mick Newell and Angus Fraserand the English Test Captain Joe Root.
"The first thing we talked about as a selection panel - and it coincided with one of my first trains of thought coming into the job - was how could we..."
Buttler, on the other hand, last played in the whites back in 2016 and was overlooked for the Ashes squad.
Had it not been for an injury to Bess's teammate at Somerset, Jack Leach, he probably wouldn't have been selected for this match. All-rounder Ben Stokes too is a part of the squad.
As for Bess, who is just 20, he has featured in 16 first-class matches and taken 63 wickets at an average of 22.49.
Jos Buttler has been recalled to the England Test team for the first clash with Pakistan.
Stokes, on the other hand, played his last game against New Zealand, his country of birth, after having made a return to the side from suspension, after having been charged with affray in September past year.
Speaking about Bess, Smith said: "Dom Bess has made an excellent start to his first-class career". The selection panel feels that this is the flawless moment to reintroduce Jos to Test cricket, where he has already enjoyed some success, including a stint playing as a specialist batsman at number seven. "He has impressed everyone with his performances for Somerset and when he has been given opportunities with England representative teams", said Smith. We felt that a player of his unique gifts - as a destructive batsman, fantastic competitive presence, dynamic athlete, someone who has leadership skills innate in him, who is playing with such confidence and flair - this was the right time'. "Dom's strong form, character and all-round abilities presented a compelling case for selection".