Documentation :

emblem-notice-24.pngThis new major version requires PHP ≥ 7.3 and is not backward compatible with previous versions, so the package is designed to be installed beside versions 5, 6, 7 and 8.

Installation, Fedora and Enterprise Linux 8:

dnf --enablerepo=remi install phpunit9

Installation, Enterprise Linux 6 and 7:

yum --enablerepo=remi install phpunit9

Notice: this tool is an essential component of PHP QA in Fedora. This version should be soon available in Fedora ≥ 31 (after the review of 19 new packages).