/usr/lib/R/site-library/NMF/tests/ is in r-cran-nmf 0.20.6-1build1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/R/site-library/NMF/tests/runit.NMFSet.r
/usr/lib/R/site-library/NMF/tests/runit.NMFStrategy-class.r
/usr/lib/R/site-library/NMF/tests/runit.NMFclass.r
/usr/lib/R/site-library/NMF/tests/runit.NMFfit-class.r
/usr/lib/R/site-library/NMF/tests/runit.aheatmap.R
/usr/lib/R/site-library/NMF/tests/runit.algorithms.r
/usr/lib/R/site-library/NMF/tests/runit.bioc.r
/usr/lib/R/site-library/NMF/tests/runit.distance.r
/usr/lib/R/site-library/NMF/tests/runit.interface.r
/usr/lib/R/site-library/NMF/tests/runit.options.r
/usr/lib/R/site-library/NMF/tests/runit.parallel.r
/usr/lib/R/site-library/NMF/tests/runit.seed.r
/usr/lib/R/site-library/NMF/tests/runit.utils.r