Harry Kane believes the upcoming high-profile friendlies will be crucial after England qualified so easily for next summer's European Championship.
Roy Hodgson's men have rallied impressively after last year's World Cup debacle, going on a 14-match unbeaten run since returning from Brazil.
The Three Lions have enjoyed 12 wins in that period, the latest of which came on Monday as Lithuania were swatted aside 3-0 on a cold night in Vilnius.
SIGN UP NOW
Want to become a GMS writer? Sign up now and submit a 250 word test article: https://gms.to/haveyoursay4
That victory saw England reach a major championship with a 100-per-cent record for the first time ever, but Switzerland were the only real opposition in a group that also included Slovenia, Estonia and San Marino.
It makes England's glamorous pre-tournament friendlies all the more important in Kane's opinion, starting with a trip to Spain and Wembley encounter against France next month.
"We'll be playing some of the top nations in the world," he said. "They are the sort of teams we should be testing ourselves against. It's good preparation for us.
"I don't think (we will approach them with any trepidation). We've won 10 out of 10 and the confidence is sky high.
"We had a game plan here and we knew what we had to do. It's a great achievement. We are very proud.
"We can't afford to get carried away as we have some top friendlies coming up against some top sides. We're looking forward to testing ourselves against those."
England are certainly going to have a tougher time in those matches compared to the clash in Lithuania, where Kane did everything but score.
He certainly had chances, only to be denied by the saves of Giedrius Arlauskis. When he did manage to beat the impressive goalkeeper, Kane saw his shot come back off the post and bounce into the net off the back of Arlauskis.
"Oh no, that's a scandal," Kane said jokingly when told it was given as an own goal.
"I was unlucky not to score officially. I got a few shots off and was quite pleased with the way I played.
"I've just got to keep going at it, keep working hard and the goals will come."