The All Blacks and Australia will play back-to-back Bledisloe Cup tests at Eden Park, NZ Rugby has announced.
On Saturday, the teams will square off in the opening test of the series in Auckland, before meeting again the following Saturday, August 14.
The second test was originally to be played at Wellington's Sky Stadium on August 28, until the schedule was brought forward to accommodate the pause of the trans-Tasman bubble.
A previous booking for a beer festival on the weekend of August 14 meant a new venue had to be found. Options of a mid-week game or a Sunday afternoon test were explored, before settling on the solution of consecutive games at the iconic Auckland ground.
The teams will then head back across the Tasman for the third and final Bledisloe Cup test at Perth's Optus Stadium on August 28 - a week later than first scheduled.
"While we are pleased to have some certainty around venues, we feel for our Wellington fans who will now miss out on two tests," New Zealand Rugby chief executive Mark Robinson says.
"It's exciting to be in a position where the All Blacks and Australia can now prepare for two Bledisloe Cup tests in New Zealand and what promises to be two great weekends."
The schedule change also sees New Zealand not host two Rugby Championship tests against Argentina, originally to be held on September 11 in Auckland and in Wellington on September 18.
The readjusted schedule means that Wellington will not host a test match in 2021.
Those matches will now be played in Australia, with dates and locations to be confirmed by SANZAAR.
NZ Rugby is continuing to plan for two tests against the world champion Springboks to be held in New Zealand. Those will be played in Dunedin on September 25, and Auckland on October 2.