diff --git a/regression-tests/pure2-optional-typename.cpp2 b/regression-tests/pure2-optional-typename.cpp2
index 696850e36..832e3c315 100644
--- a/regression-tests/pure2-optional-typename.cpp2
+++ b/regression-tests/pure2-optional-typename.cpp2
@@ -13,7 +13,8 @@ f: <T, V: T::value_type> (x: T::value_type) -> T::value_type = {
   // Emitted `template`.
   ptr: type  == * T;                                   // Needed, pending #502.
   type: type == std::pointer_traits<ptr>::rebind<ptr>; // Type-only context.
-  _ = :std::pointer_traits<ptr>::rebind<ptr> = ();     // Non type-only context.
+  // Uncomment once `typename` is supported for template arguments.
+  // _ = :identity<typename std::pointer_traits<ptr>::rebind<ptr>> = (); // Non type-only context.
 
   // Aliases.
   w: type == T;
diff --git a/regression-tests/test-results/pure2-optional-typename.cpp b/regression-tests/test-results/pure2-optional-typename.cpp
index 9cb3dc1bb..0e0766cc0 100644
--- a/regression-tests/test-results/pure2-optional-typename.cpp
+++ b/regression-tests/test-results/pure2-optional-typename.cpp
@@ -15,7 +15,7 @@ template<typename T> using identity = T;
 template<typename T, typename T::value_type V> [[nodiscard]] auto f(cpp2::in<typename T::value_type> x) -> typename T::value_type;
   
 
-#line 36 "pure2-optional-typename.cpp2"
+#line 37 "pure2-optional-typename.cpp2"
 auto main() -> int;
   
 
@@ -37,7 +37,8 @@ template<typename T, typename T::value_type V> [[nodiscard]] auto f(cpp2::in<typ
   // Emitted `template`.
   using ptr = T*;                                      // Needed, pending #502.
   using type = typename std::pointer_traits<ptr>::template rebind<ptr>;// Type-only context.
-  (void) typename std::pointer_traits<ptr>::template rebind<ptr>{};// Non type-only context.
+  // Uncomment once `typename` is supported for template arguments.
+  // _ = :identity<typename std::pointer_traits<ptr>::rebind<ptr>> = (); // Non type-only context.
 
   // Aliases.
   using w = T;