The Black Ferns Sevens survived a late scare to claim their fourth World Series tournament of the season, beating Australia in the Langford final to claim a hat-trick of titles in Canada.
The win confirmed New Zealand as the first sevens team to qualify for the 2020 Tokyo Olympics.
The World Cup and Commonwealth Games champions bounced back from a disappointing fifth-place finish in Kitakyushu in Japan last month to go unbeaten in Canada.
Sarah Hirini and Niall Williams scored first-half tries as New Zealand led 14-10 at halftime, before standout Tyla Nathan-Wong showed her class, scoring one try, converting all three and proving the difference in the 21-17 win. Her performance saw her named Player of the Final.
Winning four of this season's five tournaments, the Black Ferns Sevens had done enough to qualify for the Olympics after beating Spain in the quarter-finals early yesterday.