A date has been set for rapper Eminem's copyright case against the National Party.
Eminem's publishers Eight Mile Style and Martin Affiliated are suing the National Party, accusing it of breach of copyright.
They allege National used the song Lose Yourself without permission in a campaign ad in the run-up to the 2014 election.
At the time, a spokesman for Eminem's publishers said the National Party did not approach them for permission.
National Party campaign manager Steven Joyce told reporters in 2014 the party's use of the song was "pretty legal".
The trial will begin May 1 next year and will run for three weeks at the High Court in Wellington.