Nabi hit an unbeaten 84 off 54 balls under pressure to guide Afghanistan to 164-6 before Mujeeb claimed a career best 4-15 to help his side dismiss Bangladesh for 139 in 19.5 overs for their world record 12 successive Twenty20 international win.
Nabi discussed the decision in a video statement released by the Afghanistan Cricket Board. "I have served Afghanistan for the last 18 years. It was my dream as well to help Afghanistan obtain Test status and that dream is realised now," he said.
Shah made 102 and put on a crucial 120-run fourth-wicket stand with Asghar Afghan, batting on 88, to counter the Bangladesh spin attack at the Zahur Ahmed Chowdhury Stadium in Chittagong.
Batsman Rahmat Shah on Thursday became the first Afghanistan cricketer to score a Test century, helping the minnows start strongly against Bangladesh on the opening day of the one-off match.
Rashid Khan claimed 6-49 and completed his maiden 10-wicket haul in Test cricket as Afghanistan overcame rain and fading light to crush Bangladesh by 224 runs in the one-off Test in Chittagong on Monday.
Rahmanullah Gurbaz smashed a stunning 87, and Rashid Khan took a three-wicket haul to help Afghanistan register a 48-run win in the opening T20I against Zimbabwe in Abu Dhabi.
Afghanistan were facing an innings defeat at 81-7 but opener Ibrahim Zadran fought hard during his 76 - his second half-century - and added 48 for the eighth wicket with Amir Hamza who remained 21 not out.
"The universe boss is here in Pakistan alright," he said in a video message released by the team. "All my Pakistan fans, I am looking forward to entertaining you... so stay tuned."
Another Paul Stirling century went in vain as Afghanistan spinners Rashid Khan starred in the final ODI to hand their side a 36-run victory. With the 3-0 series sweep over Ireland, Afghanistan have claimed 30 points as they climb up the ICC Cricket