diff --git a/test/support/msvc_stdlib_force_include.hpp b/test/support/msvc_stdlib_force_include.hpp
index 954cf513e..cd321cdb9 100644
--- a/test/support/msvc_stdlib_force_include.hpp
+++ b/test/support/msvc_stdlib_force_include.hpp
@@ -70,9 +70,10 @@ const AssertionDialogAvoider assertion_dialog_avoider{};
     #define _ENABLE_ATOMIC_ALIGNMENT_FIX
 
     // Enable features that /std:c++latest removes by default.
-    #define _HAS_AUTO_PTR_ETC          1
-    #define _HAS_FUNCTION_ASSIGN       1
-    #define _HAS_OLD_IOSTREAMS_MEMBERS 1
+    #define _HAS_AUTO_PTR_ETC               1
+    #define _HAS_FUNCTION_ALLOCATOR_SUPPORT 1
+    #define _HAS_OLD_IOSTREAMS_MEMBERS      1
+    #define _HAS_UNEXPECTED                 1
 
     // Silence warnings about raw pointers and other unchecked iterators.
     #define _SCL_SECURE_NO_WARNINGS