smells like the closed issue
https://bugs.xdebug.org/view.php?id=1922

Running the attached example I would expected 100% code coverage returned, however with Xdebug 3.1.3 it only returns 4/ 5

    private static function recordTokenClass()
    {
        self::$currentUse = array(       // this line is not marked as covered... the other 4 lines are
            'class' => self::$groupNamespace,
            'alias' => '',
        );
        self::$recordPart = 'class';
    }