/usr/share/php/kohana3.1/modules/cache/tests/ is in libkohana3.1-mod-cache-php 3.1.5-1.1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/kohana3.1/modules/cache/tests/cache/
/usr/share/php/kohana3.1/modules/cache/tests/cache/CacheBasicMethodsTest.php
/usr/share/php/kohana3.1/modules/cache/tests/cache/CacheTest.php
/usr/share/php/kohana3.1/modules/cache/tests/cache/FileTest.php
/usr/share/php/kohana3.1/modules/cache/tests/cache/KohanaCacheTest.php
/usr/share/php/kohana3.1/modules/cache/tests/cache/SqliteTest.php
/usr/share/php/kohana3.1/modules/cache/tests/cache/WincacheTest.php
/usr/share/php/kohana3.1/modules/cache/tests/cache/arithmetic/
/usr/share/php/kohana3.1/modules/cache/tests/cache/arithmetic/ApcTest.php
/usr/share/php/kohana3.1/modules/cache/tests/cache/arithmetic/CacheArithmeticMethods.php
/usr/share/php/kohana3.1/modules/cache/tests/cache/arithmetic/MemcacheTest.php
/usr/share/php/kohana3.1/modules/cache/tests/phpunit.xml