The international break saw the Young Lions take maximum points from their two qualifiers although an exciting victory against Scotland was followed by a more nervy, narrow success in Andorra.
A 1-0 win against the tiny nation was, Boothroyd believes, good preparation for the kind of match the Under-21 players will experience if they progress to the senior squad.
"When you come to a nation like this, you’re always expected to win big and if you don’t, it’s seen as a disappointment," he told the official FA website.
The next qualifying game is in Kiev on Friday 10 November with England not due to play in front of a home crowd until March 2018 when the return fixture against Ukraine takes place.