Prime Minister John Key is not concerned if opposition parties do not back National's nomination for Speaker of the House.
David Carter is expected to be elected as Speaker on Thursday to replace Lockwood Smith, who is to be the High Commissioner in London.
The Government's selection has angered Labour, which says it was not consulted over the decision.
Labour leader Mr Shearer said the party will delay a decision on how to vote over the Speakers' role to give National a chance to discuss it with them.
However Mr Key told TV3's Firstline he had spoken to Labour about the nomination. He said he had also consulted the Greens, who say they will not back Mr Carter.