diff --git a/test/unordered/init_type_insert_tests.cpp b/test/unordered/init_type_insert_tests.cpp
index 2de991fb..1fc2f229 100644
--- a/test/unordered/init_type_insert_tests.cpp
+++ b/test/unordered/init_type_insert_tests.cpp
@@ -21,7 +21,9 @@ struct move_only
   }
 };
 
-template <> struct std::hash<move_only>
+namespace std{
+
+template <> struct hash<move_only>
 {
   std::size_t operator()(move_only const& mo) const noexcept
   {
@@ -29,6 +31,8 @@ template <> struct std::hash<move_only>
   }
 };
 
+} // namespace std
+
 struct raii_tracker
 {
   static int move_constructs;
@@ -59,7 +63,9 @@ struct raii_tracker
   }
 };
 
-template <> struct std::hash<raii_tracker>
+namespace std{
+
+template <> struct hash<raii_tracker>
 {
   std::size_t operator()(raii_tracker const& rt) const noexcept
   {
@@ -67,6 +73,8 @@ template <> struct std::hash<raii_tracker>
   }
 };
 
+} // namespace std
+
 int raii_tracker::move_constructs = 0;
 int raii_tracker::copy_constructs = 0;