Ross Taylor made a bristling 150 as New Zealand chose batting practice ahead of possible victory in a drab draw at Northampton.
Leading by 149 when they set out to consolidate their advantage, the Kiwis were already 328 at lunch on the final day - with Taylor six short of his hundred.
But if there was any temptation to open the game up after Taylor reached three figures, it was resisted - allowing Gareth Hopkins time to make a maiden 50 for his country in a teatime 317-7 seven declared.
Northants were therefore set a notional 466 from 32 overs in a contest which was put out of its misery under leaden skies with the hosts 85-2 at 5.15pm, on the back of a fluent half-century from captain Stephen Peters (52).
To their credit - even after Kyle Mills had produced a beauty to have opener Andrew Crook caught behind cheaply - Northants were prepared to play some shots to entertain a sparse and chilly crowd.
New Zealand had been fleetingly in danger of another second-innings collapse but from 54-4 on a cloudy morning, Taylor dominated successive century stands with Brendon McCullum and then Hopkins (63).
Northants seamer David Wigley (4-77) struck early when he made Daniel Flynn his ninth victim of the match.
For New Zealand, Flynn's failure - and that of James Marshall to the final ball yesterday - were of concern.
Flynn, back in the fray after losing two teeth when he was hit in the face by a James Anderson bouncer in Manchester, and Marshall - struggling at number three so far this summer - each needed time in the middle and runs on the board.
But after the unfortunate Flynn bottom-edged a back-foot defence down on to the base of leg-stump, they had managed only 21 between them from four innings in this match.
Wigley bowled another testing spell, but Taylor got cracking at the other end with three back-foot fours in one David Lucas over.
Having escaped a tough chance to gully from his first ball yesterday, he then went after off-spinner Jason Brown.
A series of big shots in one Brown over brought him 14 runs and culminated in a huge six over long-on to complete his 50, during a 154-ball innings which was to contain 17 fours and six maximums.
McCullum was uncharacteristically quiet in his support role until falling to the first ball after lunch - ruled by rookie umpire Steve Gale to have nicked Brown to the wicketkeeper.
Taylor's shot-making continued unhampered until he retired out - having given one more chance, put down on 131 in the deep by Peters off Graeme White's left-arm spin.
Hopkins had made only 13 when sub fielder Mark Nelson dropped a routine catch at cover off Wigley, who deserved better.
The wicketkeeper-batsman went on to time seven fours in a compact 50 - and it was only when he chipped a catch to midwicket off Crook's off-spin that McCullum decided his team had finally batted for long enough.