Game, set and match to David Shearer.
Labour's leader still faces a further test in February under his party's new rules in the form of an obligatory caucus motion requiring he obtain the backing of more than 60 per cent of his MPs to avoid triggering a leadership election.
Shearer's securing of unanimous backing in yesterday's ballot on a similar motion at an emergency caucus meeting called by him has effectively made February's vote a formality.
The successful tactic has left David Cunliffe and his supporters now having to decide whether they are willing to sustain the hellfire and damnation that will surely rain down on them if they seriously entertain thoughts of a renewed challenge to Shearer's leadership in the New Year.
Unfortunately for Cunliffe, there is nothing of note on the horizon between now and February to offer him any leverage to improve his chances of persuading more colleagues to support him.