/usr/share/php/PHPUnit/Extensions/ is in phpunit-selenium 1.2.6-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/PHPUnit/Extensions/Selenium2TestCase/
/usr/share/php/PHPUnit/Extensions/Selenium2TestCase.php
/usr/share/php/PHPUnit/Extensions/Selenium2TestCase/Command.php
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