diff --git a/src/tester.c b/src/tester.c
index c96ef8e..da5f11e 100644
--- a/src/tester.c
+++ b/src/tester.c
@@ -236,4 +236,6 @@ int main(int argc, char **argv)
 
     printf("\nSummary: %d passed, %d failed\n", success_tests_counter, failed_tests_counter);
     close(f);
+
+    return !(!failed_tests_counter);
 }