Running PHPUnit 7.5.20 (latest that's supported by WordPress), seeing couple of warnings:
Warning - The configuration file did not pass validation!
The following problems have been detected:
Line 17:
- Element 'phpunit', attribute 'syntaxCheck': The attribute 'syntaxCheck' is not allowed.
Line 19:
- Element 'testsuite': The attribute 'name' is required but missing.
Test results may not be as expected.
Running PHPUnit 7.5.20 (latest that's supported by WordPress), seeing couple of warnings: