/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/ is in php-horde-db 2.0.4-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Mysql/
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Mysql/ColumnDefinition.php
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Mysql/ColumnTest.php
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Mysql/TableDefinition.php
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/MysqlTest.php
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/MysqliTest.php
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Pdo/
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Pdo/MysqlTest.php
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Pdo/PgsqlBase.php
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Pdo/PgsqlTest.php
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Pdo/SqliteBase.php
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Pdo/SqliteTest.php
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Postgresql/
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Postgresql/ColumnDefinitionTest.php
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Postgresql/ColumnTest.php
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Postgresql/TableDefinitionTest.php
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Sqlite/
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Sqlite/ColumnDefinitionTest.php
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Sqlite/ColumnTest.php
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/Sqlite/TableDefinitionTest.php
/usr/share/php/tests/Horde_Db/Horde/Db/Adapter/conf.php.dist