diff --git a/beast/threads/impl/Stoppable.test.cpp b/beast/threads/impl/Stoppable.test.cpp
index 3baa2ef87..ecdbcf9c3 100644
--- a/beast/threads/impl/Stoppable.test.cpp
+++ b/beast/threads/impl/Stoppable.test.cpp
@@ -440,6 +440,6 @@ public:
     }
 };
 
-BEAST_DEFINE_TESTSUITE(Stoppable,beast_core,beast);
+BEAST_DEFINE_TESTSUITE_MANUAL(Stoppable,beast_core,beast);
 
 }