Australia A were reeling at 9-57 before Bancroft (49) and Riley Meredith (19no) restored some pride, batting longer for the 10th wicket than the first nine combined.
Bancroft’s ability to dig in and withstand difficult periods was what first elevated him to selection as a Test opener.
Having only been added to the XI when Nic Maddinson withdrew on mental health grounds, Bancroft has at least given national coach Justin Langer and chief selector Trevor Hohns something to think about after coming in at No.6 and facing 155 balls.
While Harris has the benefit of incumbency, his patchy record means he is no certainty to open the batting with David Warner in the first Test at the Gabba.
But Bancroft concedes he may be coming from too far back to capitalise, having been dropped during the Ashes and out of form in the Sheffield Shield.
“Probably highly unlikely, I would have thought,” Bancroft said.
“But if you’re not winning, you’re learning, aren’t you? I learned a lot today, had a lot of positive little wins out there with my batting.
“I walk away and keep being positive, keep looking to improve. That’s all you can do.”
Pakistan’s fast bowlers have tended to struggle in Australian conditions but the impressive performance of veteran seamer Imran Khan (5-32) and left-armer Shaheen Afridi (2-42) in Perth will buoy the tourists’ confidence.
“They were really consistent,” Bancroft said.
“They didn’t go searching at all. They held a good area and really tested our patience, and I’m sure a lot of us wish we could have gone out there and done it a bit better.”