Haris Rauf has played just one Test in his career so far.
Highlighting the challenges posed by the longest format, Akram cited that if Rauf wants to be counted among the modern-day greats, he must excel in Test cricket.
While announcing the squad for the Australia series last month, chief selector Wahab Riaz revealed that Rauf initially agreed to play Test cricket but changed his decision later on.
"That's his decision. He's a contracted player, so there's a lot of controversies back home," Akram told reporters at an event.
"There are some white-ball specialist cricketers in this day and age... if he thinks he's not there as yet, then that's his call."
Having made his international debut in January 2020, Haris Rauf has played just one Test so far. He is renowned as a T20 specialist.
The Pakistan Cricket Board (PCB) has also granted him NOC to participate in five matches of the ongoing BBL season for Melbourne Stars.
"Test is a big boy's game at the end of the day. You've got to bowl eight-over spells. In T20 you bowl four overs and stand at fine leg. Piece of cake. Test cricket is a long race, and if you want to be remembered as a great of the game, that's where Test cricket comes in," Akram added.
(With IANS Inputs)