20 December 2018, 05:48 GMT
"The fifth and final launch of Soyuz-2.1v as part of flight tests is scheduled for 2019. Previously, it was planned to be carried out this year," the source said.
Four previous test launches of the Soyuz-2.1v from Plesetsk were performed in the period from 2013 to 2018.
READ MORE: Russian Cosmonaut Dismisses Rumours About ISS Crew, Hole in Soyuz Spaceship
Last year, a Soyuz-2.1v carrier rocket blasted off from the Plesetsk space centre with the Russian Defense Ministry's spacecraft on board.
