/usr/share/octave/packages/interval-1.4.1/test/ is in octave-interval 1.4.1-1.
This file is owned by root:root, with mode 0o755.
..
/usr/share/octave/packages/interval-1.4.1/test/__setround__.cc-tst
/usr/share/octave/packages/interval-1.4.1/test/abs_rev.tst
/usr/share/octave/packages/interval-1.4.1/test/atan2.tst
/usr/share/octave/packages/interval-1.4.1/test/c-xsc.tst
/usr/share/octave/packages/interval-1.4.1/test/fi_lib.tst
/usr/share/octave/packages/interval-1.4.1/test/libieeep1788_tests_bool.tst
/usr/share/octave/packages/interval-1.4.1/test/libieeep1788_tests_cancel.tst
/usr/share/octave/packages/interval-1.4.1/test/libieeep1788_tests_elem.tst
/usr/share/octave/packages/interval-1.4.1/test/libieeep1788_tests_mul_rev.tst
/usr/share/octave/packages/interval-1.4.1/test/libieeep1788_tests_num.tst
/usr/share/octave/packages/interval-1.4.1/test/libieeep1788_tests_overlap.tst
/usr/share/octave/packages/interval-1.4.1/test/libieeep1788_tests_rec_bool.tst
/usr/share/octave/packages/interval-1.4.1/test/libieeep1788_tests_rev.tst
/usr/share/octave/packages/interval-1.4.1/test/libieeep1788_tests_set.tst
/usr/share/octave/packages/interval-1.4.1/test/mpfi.tst
/usr/share/octave/packages/interval-1.4.1/test/mpfr_function_d.cc-tst
/usr/share/octave/packages/interval-1.4.1/test/mpfr_linspace_d.cc-tst
/usr/share/octave/packages/interval-1.4.1/test/mpfr_matrix_mul_d.cc-tst
/usr/share/octave/packages/interval-1.4.1/test/mpfr_to_string_d.cc-tst
/usr/share/octave/packages/interval-1.4.1/test/mpfr_vector_dot_d.cc-tst
/usr/share/octave/packages/interval-1.4.1/test/mpfr_vector_sum_d.cc-tst
/usr/share/octave/packages/interval-1.4.1/test/pow_rev.tst