# If there's residue from an earlier test, move it to .old.
# If there's already a .old, delete it.
xsystem ("rm -rf output/$test.old", VERBOSE => 1) if -d "output/$test.old";
# If there's residue from an earlier test, move it to .old.
# If there's already a .old, delete it.
xsystem ("rm -rf output/$test.old", VERBOSE => 1) if -d "output/$test.old";