diff --git a/test/hei_user_defines.hpp b/test/hei_user_defines.hpp
index eec606d..2ba5b8b 100644
--- a/test/hei_user_defines.hpp
+++ b/test/hei_user_defines.hpp
@@ -6,8 +6,8 @@
  *        will be used throughout this library.
  */
 
-#include <stdio.h>
 #include <assert.h>
+#include <stdio.h>
 
 #define HEI_INF(...) \
     { \