At the beggining of the documentations, there is: ...

# kotest

[LeoColman]

At the beggining of the documentations, there is:

Matchers can be negated by using shouldNot instead of should for the infix style. For example, a shouldNot startWith("boo"). For the extension function style, each function has an equivalent negated version, for example, a.shouldNotStartWith("boo").