diff --git a/test/handle/copyable.cpp b/test/handle/copyable.cpp
index cd17c54..161b808 100644
--- a/test/handle/copyable.cpp
+++ b/test/handle/copyable.cpp
@@ -1,10 +1,12 @@
-#include <gtest/gtest.h>
-#include <optional>
 #include <stdplus/handle/copyable.hpp>
+
+#include <optional>
 #include <string>
 #include <utility>
 #include <vector>
 
+#include <gtest/gtest.h>
+
 namespace stdplus
 {
 namespace