The Common Entrance is set to be overhauled, with pupils possibly taking it online in future.
According to the Daily Telegraph, the Independent Association of Prep Schools (IAPS) is considering this option as it will be less stressful for children.
The Common Entrance was introduced in 1904, with pupils taking tests once they have been offered a place at a private school.
David Hanson, chief executive of the IAPS, said the exam has been around for so long because of its "great qualities".
The IAPS now needs to build on this and use technology to ease the burden of exams on young people.
''These tests can be done online, in the child's school, which we hope will not only help them to feel more at ease, but also free up time during senior school visits so pupils can really get to know their chosen new school," he added.