/usr/share/openscad/regression/echotest/ is in openscad-testing-data 2015.03-1+dfsg-3.
This file is owned by root:root, with mode 0o755.
..
/usr/share/openscad/regression/echotest/builtin-tests-expected.echo
/usr/share/openscad/regression/echotest/children-tests-expected.echo
/usr/share/openscad/regression/echotest/chr-tests-expected.echo
/usr/share/openscad/regression/echotest/concat-tests-expected.echo
/usr/share/openscad/regression/echotest/cross-tests-expected.echo
/usr/share/openscad/regression/echotest/dim-all-expected.echo
/usr/share/openscad/regression/echotest/echo-expected.echo
/usr/share/openscad/regression/echotest/echo-tests-expected.echo
/usr/share/openscad/regression/echotest/empty-stl-expected.echo
/usr/share/openscad/regression/echotest/escape-test-expected.echo
/usr/share/openscad/regression/echotest/expression-evaluation-tests-expected.echo
/usr/share/openscad/regression/echotest/expression-shortcircuit-tests-expected.echo
/usr/share/openscad/regression/echotest/for-tests-expected.echo
/usr/share/openscad/regression/echotest/include-recursive-test-expected.echo
/usr/share/openscad/regression/echotest/include-tests-expected.echo
/usr/share/openscad/regression/echotest/inf-tests-expected.echo
/usr/share/openscad/regression/echotest/len-tests-expected.echo
/usr/share/openscad/regression/echotest/let-tests-expected.echo
/usr/share/openscad/regression/echotest/list-comprehensions-expected.echo
/usr/share/openscad/regression/echotest/lookup-tests-expected.echo
/usr/share/openscad/regression/echotest/min-max-tests-expected.echo
/usr/share/openscad/regression/echotest/nbsp-latin1-test-expected.echo
/usr/share/openscad/regression/echotest/nbsp-utf8-test-expected.echo
/usr/share/openscad/regression/echotest/no-break-space-test-expected.echo
/usr/share/openscad/regression/echotest/norm-tests-expected.echo
/usr/share/openscad/regression/echotest/operators-tests-expected.echo
/usr/share/openscad/regression/echotest/parent_module-tests-expected.echo
/usr/share/openscad/regression/echotest/parser-tests-expected.echo
/usr/share/openscad/regression/echotest/rands-expected.echo
/usr/share/openscad/regression/echotest/range-tests-expected.echo
/usr/share/openscad/regression/echotest/recursion-test-function-expected.echo
/usr/share/openscad/regression/echotest/recursion-test-function2-expected.echo
/usr/share/openscad/regression/echotest/recursion-test-module-expected.echo
/usr/share/openscad/regression/echotest/scope-assignment-tests-expected.echo
/usr/share/openscad/regression/echotest/search-tests-expected.echo
/usr/share/openscad/regression/echotest/search-tests-unicode-expected.echo
/usr/share/openscad/regression/echotest/string-indexing-expected.echo
/usr/share/openscad/regression/echotest/string-test-expected.echo
/usr/share/openscad/regression/echotest/string-unicode-expected.echo
/usr/share/openscad/regression/echotest/tail-recursion-tests-expected.echo
/usr/share/openscad/regression/echotest/unicode-tests-expected.echo
/usr/share/openscad/regression/echotest/utf8-tests-expected.echo
/usr/share/openscad/regression/echotest/value-reassignment-tests-expected.echo
/usr/share/openscad/regression/echotest/value-reassignment-tests2-expected.echo
/usr/share/openscad/regression/echotest/variable-scope-tests-expected.echo
/usr/share/openscad/regression/echotest/vector-values-expected.echo