Following Darlow's move to Newcastle United, De Vries was promoted to first-choice goalkeeper for the 2015–16 season and took the number one shirt. He played in all but one of Forest's league matches, missing the away fixture against Sheffield Wednesday with a back injury. On 1 May 2016 De Vries was voted Player of the Season for 2015–16 by Forest's supporters after a consistent year in goal, which included a hat-trick of Player of the Month awards for August, February and March. He also saved all three of the penalties he faced during the season.
