On Tuesday, the 15 CCC MPs filed a court appeal challenging a decision by the parliamentary speaker declaring their seats vacant.
ZANU-PF, in power since independence in 1980, secured a majority in parliament but fell a few lawmakers short of the number required to change the constitution.
Fifteen opposition lawmakers in Zimbabwe have lost their seats in Kafkaesque fashion after what they say is an impostor posing as a party official recalled them - and parliament went along with it.
The move has paved the way for by-elections that could hand the ruling ZANU-PF party, which won a disputed election in August, a two-thirds majority needed to amend the constitution.
