Ten claimants began a legal challenge against the bedroom tax on Wednesday of last week.
They all come from households that include a disabled person.
They say that the bedroom tax discriminates against disabled people who need extra space to store equipment, have a carer overnight or have children whose impairment stops them sharing a room.
Over two thirds of households affected by the bedroom tax include a disabled adult.
Judges heard evidence last week.
After they have ruled, a second judicial review is set to challenge the bedroom tax’s application to the children of separated parents.