Three men will stand trial in July over the death of an inmate at HMP Wormwood Scrubs.
Ahmed Khyre, 21, Kalif Dibbassey, 21 and Enton Marku, 20, are charged with the murder of 25-year-old Khader Saleh.
On January 31, Mr Saleh was found in a cell at the west London jail with a number of knife injuries. He was pronounced dead at the scene.
The defendants appeared at the Old Bailey via video link from Belmarsh, Wandsworth and High Down prisons.
Judge Nicholas Hilliard QC set a four-week trial for July 23 with a plea and case management hearing on April 24.
Dutch national Khyre, Briton Marku and Frenchman Dibbassey spoke only to confirm their identities. The men were remanded into custody.
Wormwood Scrubs is a category B prison in Shepherd's Bush, West London, with a capacity to hold 1,279 men.