The Euro 2016 hosts were in fine form prior to the break as Alexandre Lacazette opened his international account before Olivier Giroud doubled the lead.
France perhaps should have enjoyed a healthier lead at the break and were almost made to pay when Stephane Ruffier was forced into two smart second-half saves from Lars Jacobsen and Nicklas Bendtner.
Deschamps, whose side next face Belgium and Albania in June, told TF1: "We did better things in the first half.
"The rhythm then dropped a lot, which with many changes is only logical.
"There are a core of players. Players must now focus on their domestic and European competitions."
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