diff --git a/tests/unit-tests/security/safe-bag.t.cpp b/tests/unit-tests/security/safe-bag.t.cpp
index cdfe27d..3c93e58 100644
--- a/tests/unit-tests/security/safe-bag.t.cpp
+++ b/tests/unit-tests/security/safe-bag.t.cpp
@@ -20,6 +20,7 @@
  *
  * @author Zhiyi Zhang <dreamerbarrychang@gmail.com>
  */
+
 #include "security/safe-bag.hpp"
 
 #include "boost-test.hpp"