The Wisconsin Supreme Court will hear arguments next month in a challenge to the state's domestic partner registry.
The registry give same-sex couples a host of legal rights. Members of the conservative group Wisconsin Family Action filed a lawsuit in 2010 alleging the registry violates a 2006 state constitutional amendment barring gay marriage and anything similar.
A state appeals court upheld the registry in December, saying married couples have more rights than same-sex couples on the registry.
The Supreme Court announced in June it would take the case. The justices have set oral arguments for Oct. 23.