diff --git a/tests/c++.at b/tests/c++.at
index e2e73fc2..13902138 100644
--- a/tests/c++.at
+++ b/tests/c++.at
@@ -313,7 +313,7 @@ AT_DATA_GRAMMAR([list.y],
       }
 
 #if defined __cplusplus && 201103L <= __cplusplus
-      string (string&& s)
+      string (string&& s) noexcept
         : val_(std::move(s.val_))
       {
         s.val_.clear();