set LC_ALL=C so sed will not generate some messages about bad UTF-8

    sed: RE error: illegal byte sequence

Author: ErwanMAS

tests/custom/run_tests.sh

@@ -6,11 +6,7 @@ else
 	readlink=readlink
 fi
 
-if type gsed &>/dev/null ; then
-    sed=gsed
-else
-    sed=sed
-fi    
+LC_ALL=C
 
 testdir=$(dirname "$0")
 topdir=$($readlink -f "$testdir/../..")
@@ -111,7 +107,7 @@ run_testcase() {
 	printf "%d\n" $? > "$dir/res.code"
 	touch "$dir/empty"
 
-	$sed -i -e "s#$dir#.#g" "$dir/res.out" "$dir/res.err"
+	sed -i -e "s#$dir#.#g" "$dir/res.out" "$dir/res.err"
 
 	if ! cmp -s "$dir/res.err" "${err:-$dir/empty}"; then
 		[ $fail = 0 ] && printf "!\n"