/usr/share/installed-tests/ is in gjs-tests 1.52.1-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/installed-tests/gjs/
/usr/share/installed-tests/gjs/testByteArray.test
/usr/share/installed-tests/gjs/testCairo.test
/usr/share/installed-tests/gjs/testCommandLine.sh.test
/usr/share/installed-tests/gjs/testEverythingBasic.test
/usr/share/installed-tests/gjs/testEverythingEncapsulated.test
/usr/share/installed-tests/gjs/testExceptions.test
/usr/share/installed-tests/gjs/testFormat.test
/usr/share/installed-tests/gjs/testFundamental.test
/usr/share/installed-tests/gjs/testGDBus.test
/usr/share/installed-tests/gjs/testGIMarshalling.test
/usr/share/installed-tests/gjs/testGLib.test
/usr/share/installed-tests/gjs/testGObjectClass.test
/usr/share/installed-tests/gjs/testGObjectDestructionAccess.test
/usr/share/installed-tests/gjs/testGObjectInterface.test
/usr/share/installed-tests/gjs/testGTypeClass.test
/usr/share/installed-tests/gjs/testGettext.test
/usr/share/installed-tests/gjs/testGio.test
/usr/share/installed-tests/gjs/testGtk.test
/usr/share/installed-tests/gjs/testImporter.test
/usr/share/installed-tests/gjs/testLang.test
/usr/share/installed-tests/gjs/testLegacyClass.test
/usr/share/installed-tests/gjs/testLegacyGObject.test
/usr/share/installed-tests/gjs/testLegacyGtk.test
/usr/share/installed-tests/gjs/testLocale.test
/usr/share/installed-tests/gjs/testMainloop.test
/usr/share/installed-tests/gjs/testNamespace.test
/usr/share/installed-tests/gjs/testPackage.test
/usr/share/installed-tests/gjs/testParamSpec.test
/usr/share/installed-tests/gjs/testSignals.test
/usr/share/installed-tests/gjs/testSystem.test
/usr/share/installed-tests/gjs/testTweener.test
/usr/share/installed-tests/gjs/testWarnings.sh.test
/usr/share/installed-tests/gjs/testself.test