/usr/lib/R/site-library/RUnit/unitTests/ is in r-cran-runit 0.4.27-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/R/site-library/RUnit/unitTests/Makefile
/usr/lib/R/site-library/RUnit/unitTests/runalltests.R
/usr/lib/R/site-library/RUnit/unitTests/runitHTMLProtocol.r
/usr/lib/R/site-library/RUnit/unitTests/runitInspect.r
/usr/lib/R/site-library/RUnit/unitTests/runitPlotConnection.r
/usr/lib/R/site-library/RUnit/unitTests/runitRUnit.r
/usr/lib/R/site-library/RUnit/unitTests/runitS4.r
/usr/lib/R/site-library/RUnit/unitTests/runitSetUp.r
/usr/lib/R/site-library/RUnit/unitTests/runitTearDown.r
/usr/lib/R/site-library/RUnit/unitTests/runitTestLogger.r
/usr/lib/R/site-library/RUnit/unitTests/runitTextProtocol.r