diff --git a/.upstream-tests/test/support/msvc_stdlib_force_include.h b/.upstream-tests/test/support/msvc_stdlib_force_include.h
index c49f8abb68..52534cfad9 100644
--- a/.upstream-tests/test/support/msvc_stdlib_force_include.h
+++ b/.upstream-tests/test/support/msvc_stdlib_force_include.h
@@ -78,6 +78,7 @@ const AssertionDialogAvoider assertion_dialog_avoider{};
     #define _SILENCE_ALL_CXX20_DEPRECATION_WARNINGS
 #endif // _LIBCXX_IN_DEVCRT
 
+#define _SILENCE_CXX20_CISO646_REMOVED_WARNING
 #include <ciso646>
 
 #if _HAS_CXX20