Prime Minister Jacinda Ardern does not expect Labour will win the Tauranga byelection and promises a date will be set soon.
When asked in her weekly post-Cabinet press conference on Monday if she thought Labour could win, Ardern said it was a seat that hadn't been held by Labour since the 1930s.
"So we don't expect there to be a change from that fairly strong record in one direction."
The byelection was sparked by the resignation from Parliament of Simon Bridges, the member for Tauranga and a former National leader.
Ardern promised to set a date for the byelection soon, saying she was seeking one point of clarification with the Electoral Commission in terms of timing.