diff --git a/test/test_mutex.cpp b/test/test_mutex.cpp
index ce57381..9879b5c 100644
--- a/test/test_mutex.cpp
+++ b/test/test_mutex.cpp
@@ -1,5 +1,5 @@
-#include <async++/join.hpp>
 #include <async++/interleaving/runner.hpp>
+#include <async++/join.hpp>
 #include <async++/mutex.hpp>
 #include <async++/task.hpp>