Led by Saud Shakeel and helped by bad weather, Pakistan foiled Sri Lanka's victory bids as the first test ended in a draw on the fifth and final day in Rawalpindi on Friday.
Sri Lanka had sniffed victory with four wickets in the first session, with Pakistan 151-5 at lunch and a lead of 139. But Shakeel saved the home team with a fighting 97 as Pakistan finished on 284-8, a lead of 272.
Shakeel, who scored 93 in the first innings, missed on another hundred when he was bowled by Lahiru Kumara before teams shook hands to end the test.
Shakeel's 210-ball knock had seven boundaries.
Pakistan were helped by a brief 20-minute bad light break ahead of lunch before Shakeel and Ghazi Ghori (35) kept Sri Lankan bowlers at bay during a 92-run sixth wicket stand.
Milan Rathnayaka was the best bowler with 3-47 while Asitha Fernando had figures of 2-35 and Kumara 2-65.
The test was marred by bad light in the last sessions on each of the first four days and 117 overs from a stipulated 360 were lost, leaving the result tough to achieve.
Sri Lanka spurned a strong position on day four when they lost their last six wickets and slumped from 404-6 to 446 all out in reply to Pakistan's 434-9 declared.
Pacer Saqib Khan, one of four debutants for Pakistan, grabbed 7-130.
Both teams will now look for a result in the second and final test, starting at the same venue from Tuesday.
In the morning, Babar Azam's century drought continued as he fell to a leg-side trap, handing the short square-leg fielder a simple catch off fast bowler Rathnayaka for 34.
This becomes Azam's 42nd innings without a test century.
Salman Agha fell in the same manner off Rathnayaka for 13, leaving Pakistan struggling on 125-5.
Earlier, Sri Lanka struck with the first ball of the day when Kumara dismissed Azan Awais for 22 at Pakistan's overnight total of 57.
Next over, Fernando made it 57-3 with Mohammad Taha caught behind for 24.
Sri Lanka could have had Azam on 22 but Kamindu Mendis spilt a simple chance off Fernando as the Pakistan skipper failed to get an advantage.
Azam hit six fours and added 50 for the fourth wicket with Shakeel before playing a loose shot.
PAKISTAN: Azan Awais, Tayyab Arif, Mohammad Taha, Babar Azam (capt), Saud Shakeel, Salman Agha, Ghazi Ghori (wk), Arafat Minhas, Razaullah, Mohammad Abbas, Saqib Khan.
SRI LANKA: Lahiru Udara (wk), Passindu Sooriyabandara, Dinesh Chandimal, Kamindu Mendis, Dhananjaya de Silva, Kusal Mendis (capt), Sonal Dinusha, Milan Rathnayaka, Lahiru Kumara, Asitha Fernando, Dilshan Madushanka.