diff --git a/tests/runtests.pl b/tests/runtests.pl
index 43718fa58b..abd75d8755 100755
--- a/tests/runtests.pl
+++ b/tests/runtests.pl
@@ -875,6 +875,7 @@ sub checksystemfeatures {
             "* System: $hosttype\n",
             "* OS: $hostos\n",
             "* Perl: $^V ($^X)\n",
+            "* LC_ALL: '$ENV{'LC_ALL'}' LC_CTYPE: '$ENV{'LC_CTYPE'}' LC_NUMERIC: '$ENV{'LC_NUMERIC'}'\n",
             "* diff: $havediff\n",
             "* Args: $args\n");