Melissa Reid and Michaella McCollum, who pleaded guilty to attempting to smuggle £1.5 million worth of cocaine out of Peru, will be sentenced next week at a new hearing.
The pair gave behind-closed-doors pleas, in the port town of Callao. A spokesman for the court in Callao said:
They will automatically have a sixth off from the minimum jail sentence of eight years and will be sentenced to six years and eight months in prison.
Sentencing will take place on October 1 at a new hearing.
More top news
Two other men missing on Scotland's hills this winter have yet to be found.
The decision was made after two Russian athletes failed drugs tests at the PyeongChang Games.
Sunday will be dry and largely sunny, although there will be some patchy cloud, mainly across eastern Scotland and eastern England.