Walcott knows group opponents France will be a difficult challenge.
"France is a massive test," he told Arsenal Player. "We weren't quite ready when they beat us 2-1 [in November 2010]. We tried a few things that day, which is understandable in friendlies.
"But we have a lot of young players coming into form at this moment in time, players that are playing with no fear. Daniel Sturridge [of Chelsea] is fantastic at the moment and is trying to get into that team. So there are a lot of options for the manager at this moment in time."