/usr/share/php/tests/XML_Serializer/ is in php-xml-serializer 0.20.2-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/php/tests/XML_Serializer/tests/
/usr/share/php/tests/XML_Serializer/tests/AllTests.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Arrays_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Objects_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_AttributesContent_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_CDataSections_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_ClassName_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_Comment_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_DefaultTag_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_DocType_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_EncodeFunc_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_IgnoreNull_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_Indent_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_Linebreaks_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_Mode_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_Namespace_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_ReturnResult_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_RootAttributes_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_RootName_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_TagMap_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_TypeHints_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Option_XmlDeclaration_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Serializer_Scalars_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Unserializer_Arrays_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Unserializer_Objects_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Unserializer_Option_Encodings_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Unserializer_Option_GuessTypes_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Unserializer_Option_Whitespace_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/Unserializer_Scalars_TestCase.php
/usr/share/php/tests/XML_Serializer/tests/bug-12139.phpt
/usr/share/php/tests/XML_Serializer/tests/bug-13896.phpt
/usr/share/php/tests/XML_Serializer/tests/bug-15602.phpt
/usr/share/php/tests/XML_Serializer/tests/bug-9799.phpt
/usr/share/php/tests/XML_Serializer/tests/req-13564.phpt
/usr/share/php/tests/XML_Serializer/tests/show_ScalarAsAttributes_usage.phpt