With England boss Gareth Southgate opting to start with Heaton in England's 3-2 defeat to France in June, 31-year-old Burnley skipper is keen to retain his spot between the sticks.
"The World Cup at the end of the season is always there, it doesn't go away, but to have a chance of being involved in that you need performances week-in, week-out," Heaton, who has been capped three times by England, told reporters.
"I don't think there's any given right to pull on that England shirt or be in the squad. I don't think any player should ever feel comfortable.
"The competition is really strong, they're all fantastic goalkeepers, and that will only breed more success and get more out of people. I, for one, am looking forward to the challenge.
Heaton is expected to feature in England's squad for their next two World Cup qualifiers, against Malta and Slovakia in September.
(Reporting by Hardik Vyas in Bengaluru)
