diff --git a/tests/stdio_test.cpp b/tests/stdio_test.cpp
index 9d840f5..99197c9 100644
--- a/tests/stdio_test.cpp
+++ b/tests/stdio_test.cpp
@@ -19,14 +19,14 @@
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
+#include <locale.h>
 #include <math.h>
 #include <stdio.h>
-#include <sys/types.h>
 #include <sys/socket.h>
 #include <sys/stat.h>
+#include <sys/types.h>
 #include <unistd.h>
 #include <wchar.h>
-#include <locale.h>
 
 #include <string>
 #include <thread>