Attribute class `"PHPUnit\Framework\Attributes\Test"` not found

[mhsdesign]

Note

This is not an issue but a guide to solve the reflection error in the FLOW Testing context

Attribute class "PHPUnit\Framework\Attributes\Test" not found

Neos and Flow 8.4, 9.0, 9.1 were upgraded to use PHPUnit 11 (and upcoming releases will too)

See discuss https://discuss.neos.io/t/funding-request-upgrade-to-phpunit-11-in-flow-neos/7141/14

PRs:
neos/flow-development-collection#3563
#5950

Slack Discussions
https://neos-project.slack.com/archives/C04PYL8H3/p1787117953729039
https://neos-project.slack.com/archives/C050C8FEK/p1787899168805249

Update PHPUnit

To fix the above error you should update PHPUnit in your site-root distribution

"mikey179/vfsstream": "^1.6.12",
"phpunit/phpunit": "~11.5",