Education Minister Hekia Parata is preparing for an embarrassing drop in New Zealand's education rankings in an international survey next week.
She says a drop in the OECD's Programme for International Student Assessment (Pisa) is "probable" and will be due to Asian countries' improvement.
But Labour says any drop in the rankings should be sheeted home to an excessive focus by National on "testing" over the past five years.
Although National Standards does not actually involve national testing, Labour's education spokesman Chris Hipkins said, "It shows that the last five years' focus on test-taking has been a disaster and it has actually narrowed the focus of our system and it has actually decreased the level of achievement within the education system".
A drop in ranking may be embarrassing because Ms Parata's catch-cry has been lifting achievement.