Noel Blake's side defeated Switzerland 1-0 with a late strike by Saido Berahino sealing a place in the finals in Estonia in July.
Whether Reserves' top scorer Keane will be fit enough to compete in the finals is open to question as the promising striker faces a scan on his injury on Thursday after leaving the ground on crutches.
Coach Blake was particularly impressed with the defensive display at Preston's Deepdale and praised Reds trio Sam Johnstone, who captained the side, Michael Keane and Tom Thorpe.
"We had to dig in and Sam Johnstone made some terrific saves, but we defended very well overall and it was a top performance from our defenders, particularly the centre-backs [Michael Keane and Eric Dier] who have only just come together," Blake informed TheFA.com.
"Tommy Thorpe in the middle of the park too, he’s a centre-half normally but has been playing there for his club and looked right at home so there were some really good individual performances."
Meanwhile, Paul Pogba scored the fifth of France's goals in a 6-0 rout of Holland to ensure his country will also be taking part in Estonia.