diff --git a/src/run-tests.pl b/src/run-tests.pl
index d8ff1b6..d1121c5 100755
--- a/src/run-tests.pl
+++ b/src/run-tests.pl
@@ -16,6 +16,7 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
+use warnings;
 use strict;
 use File::Path;