The 27-year-old Arsenal centre-back insists the addition of the Blancos defender will help competition for places in the national side's team and improve the side
The Real Madrid centre-back, 19, is in line to earn his first cap for les Blues in the coming weeks after France boss Didier Deschamps rewarded his performances at club level by naming him in the 24-man squad to face Georgia and Spain.
However, Koscielny is among those most threatened by the inclusion of Varane as the two operate in a similar role, but the 27-year-old has refuted claims he views the youngster as a rival, instead opting to focus on how the addition will benefit the squad.
"The arrival of Varane is good competition for the squad," he told reporters. "It will force us to be better and that is a positive for the players."
Koscielny also said he was confident that he could impress alongside Mamadou Sakho, who is the only defender named in the squad to be given a starting berth in all of Deschamps' games as coach of les Blues.
"Both on and off the field we have a good relationship. I feel very good at his side," he added.