/usr/share/openscad/testdata/modulecache-tests/ is in openscad-testing-data 2013.01+dfsg-2.2.
This file is owned by root:root, with mode 0o755.
..
/usr/share/openscad/testdata/modulecache-tests/README.txt
/usr/share/openscad/testdata/modulecache-tests/circularfirst.scad
/usr/share/openscad/testdata/modulecache-tests/circularincludefirst.scad
/usr/share/openscad/testdata/modulecache-tests/circularincludemain.scad
/usr/share/openscad/testdata/modulecache-tests/circularincludesecond.scad
/usr/share/openscad/testdata/modulecache-tests/circularmain.scad
/usr/share/openscad/testdata/modulecache-tests/circularsecond.scad
/usr/share/openscad/testdata/modulecache-tests/includefrommodule.scad
/usr/share/openscad/testdata/modulecache-tests/moduleoverload.scad
/usr/share/openscad/testdata/modulecache-tests/modulewithinclude.scad
/usr/share/openscad/testdata/modulecache-tests/multipleA.scad
/usr/share/openscad/testdata/modulecache-tests/multipleB.scad
/usr/share/openscad/testdata/modulecache-tests/multiplecommon.scad
/usr/share/openscad/testdata/modulecache-tests/multiplemain.scad
/usr/share/openscad/testdata/modulecache-tests/mymodule-lib.scad
/usr/share/openscad/testdata/modulecache-tests/radius.scad
/usr/share/openscad/testdata/modulecache-tests/recursive.scad
/usr/share/openscad/testdata/modulecache-tests/recursivemain.scad
/usr/share/openscad/testdata/modulecache-tests/simpleinclude.scad
/usr/share/openscad/testdata/modulecache-tests/simpleleaf.scad
/usr/share/openscad/testdata/modulecache-tests/use-mcad.scad
/usr/share/openscad/testdata/modulecache-tests/use.scad
/usr/share/openscad/testdata/modulecache-tests/used.scad
/usr/share/openscad/testdata/modulecache-tests/usenonexistingfile.scad