diff --git a/bin/main.cpp b/bin/main.cpp
index 4f5670d..585aea8 100644
--- a/bin/main.cpp
+++ b/bin/main.cpp
@@ -255,7 +255,8 @@ int main(int argc, char *argv[])
   hack::log()("security::generate_uuid");
 
   {// ex: security::generate_uuid
-    hack::log()(hack::security::generate_uuid());
+    auto uuid = hack::security::generate_uuid();
+    hack::log()(uuid, hack::security::validate_uuid(uuid));
   }
 
   hack::log()("============================================================");