1 files changed, 6 insertions, 1 deletions
diff --git a/clang/test/SemaCXX/attr-callback.cpp b/clang/test/SemaCXX/attr-callback.cpp
index ee02f7d..ff5a241 100644
--- a/clang/test/SemaCXX/attr-callback.cpp
+++ b/clang/test/SemaCXX/attr-callback.cpp
@@ -1,4 +1,4 @@
-// RUN: %clang_cc1 %s -verify -fsyntax-only
+// RUN: %clang_cc1 %s -std=c++23 -verify -fsyntax-only
 
 // expected-no-diagnostics
 
@@ -6,6 +6,11 @@ class C_in_class {
 #include "../Sema/attr-callback.c"
 };
 
+class ExplicitParameterObject {
+  __attribute__((callback(2, 1))) void explicit_this_idx(this ExplicitParameterObject* self, void (*callback)(ExplicitParameterObject*));
+  __attribute__((callback(2, self))) void explicit_this_identifier(this ExplicitParameterObject* self, void (*callback)(ExplicitParameterObject*));
+};
+
 struct Base {
 
   void no_args_1(void (*callback)(void));