diff --git a/app/tests/test_control_event_serialize.c b/app/tests/test_control_event_serialize.c
index 9fae75dc..b8590cba 100644
--- a/app/tests/test_control_event_serialize.c
+++ b/app/tests/test_control_event_serialize.c
@@ -139,4 +139,5 @@ int main(void) {
     test_serialize_long_text_event();
     test_serialize_mouse_event();
     test_serialize_scroll_event();
+    return 0;
 }