/usr/share/php/Horde/Test/Factory/ is in php-horde-test 2.6.0+debian0-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/Horde/Test/Factory/Alarm.php
/usr/share/php/Horde/Test/Factory/Cache.php
/usr/share/php/Horde/Test/Factory/Db.php
/usr/share/php/Horde/Test/Factory/Group.php
/usr/share/php/Horde/Test/Factory/Hashtable.php
/usr/share/php/Horde/Test/Factory/History.php
/usr/share/php/Horde/Test/Factory/KolabStorage.php
/usr/share/php/Horde/Test/Factory/Mongo.php
/usr/share/php/Horde/Test/Factory/Perms.php
/usr/share/php/Horde/Test/Factory/Prefs.php
/usr/share/php/Horde/Test/Factory/Registry.php
/usr/share/php/Horde/Test/Factory/Session.php
/usr/share/php/Horde/Test/Factory/Share.php