Please work first on making this a proper polyfill before migrating to it (so that you don't hide cases where the test would pass only because of the non-standard behavior of the polyfill). See the discussion on the PR adding that trait.

This is not a blocker. We already have migrated to the new polyfill. This PR merely fixes an inconsistency and the polyfill works good enough for our tests.

@derrabus the polyfill works for our tests because it behaves like ExpectDeprecationTrait and so does not change the behavior of the method. And that's precisely the issue: it does not ensure the test will work with PHPunit 11 because it does not apply the PHPUnit 11 behavior.

Well, we make zero use of that fuzzy matching feature, so the behavior is the same for our tests. You're right that we need to fix the polyfill, but it's not a blocker for this PR.

But here you go: #58317