Both strikes planned for this week have been cancelled after talks between unions and London Underground managers.
The strikes, planned for 25-26 and 27-28 August have been called off as a "gesture of 'goodwill'", according to a tweet from Unite.
A statement from Unite said: "Over 400 members of the Unite union have suspended industrial action at London Underground as a gesture of goodwill following progress in talks over the introduction of Tube night running.
"The members of Britain’s largest union, who work as electrical and maintenance technicians, linesmen and signallers on London’s tube network, had been set to walk out for 24 hours from 18:30 on Tuesday 25 August and a further 24 hours from 18:30 on Thursday 27 August.
"This action - a work to rule and an overtime ban - has been suspended to allow for further talks with London Underground.
Unite regional officer Hugh Roberts said: “There are still some remaining sticking points, but we feel sufficient progress has been made to suspend industrial action as an act of goodwill."
“We will continue to approach talks with London Underground in a positive manner. We trust that London Underground management seize this opportunity to reach a deal that fully addresses our members’ concerns and secures a successful future for night running on the Tube.”
The strikes had been planned thanks to a dispute over pay and shifts for the new night tube service.
The night tube is due to begin on 12 September.