diff --git a/tests/runtests.sh b/tests/runtests.sh
index 0dedbfa..e437a72 100644
--- a/tests/runtests.sh
+++ b/tests/runtests.sh
@@ -21,3 +21,7 @@ echo " TOTAL: $total"
 echo "    OK: $suc"
 echo "FAILED: $fail"
 
+if [ $fail -ne 0 ]; then
+    exit 1
+fi
+