The two Tests will be at Twickenham on July 4 and 10 and the RFU expect at least 10,000 supporters to attend. England A will face Scotland A at Welford Road on June 27.
All three matches will provide Eddie Jones with an opportunity to look at younger players.
Jones said: “The summer series will give us the chance to look at a lot of players and see how they step up, and it’s an important part of our World Cup preparation.
“For younger players, it’s a chance to show what they can do at international level and how they are in the team environment.”
England A, a concept which has been dormant for five years, will take Scotland A at Welford Road on June 27.