Hi,
https://twitter.com/RemiCollet/status/924580669166161921
In short: setExpectedException with empty message means
* until 5.7.22, "don't care about message"
* since 5.7.23, "empty message"
For now I keep 5.7.23 in testing but also have already start fixing the
affected package.
As Sebastian Bergman don't agree about "BC break", I think this is not
going to be fixed in PHPUnit, so version 5.7.23 will probably go to
stable in some time...
Remi