Index: test/std/utilities/meta/meta.trans/meta.trans.other/underlying_type.pass.cpp
===================================================================
--- test/std/utilities/meta/meta.trans/meta.trans.other/underlying_type.pass.cpp
+++ test/std/utilities/meta/meta.trans/meta.trans.other/underlying_type.pass.cpp
@@ -23,12 +23,12 @@
 {
     static_assert((std::is_same<std::underlying_type<E>::type, int>::value),
                   "E has the wrong underlying type");
-    static_assert((std::is_same<std::underlying_type<F>::type, unsigned>::value),
-                  "F has the wrong underlying type");
+    LIBCPP_STATIC_ASSERT((std::is_same<std::underlying_type<F>::type, unsigned>::value),
+                  "F has the wrong underlying type"); // MSVC's ABI doesn't follow the Standard
 
 #if _LIBCPP_STD_VER > 11
     static_assert((std::is_same<std::underlying_type_t<E>, int>::value), "");
-    static_assert((std::is_same<std::underlying_type_t<F>, unsigned>::value), "");
+    LIBCPP_STATIC_ASSERT((std::is_same<std::underlying_type_t<F>, unsigned>::value), ""); // MSVC's ABI
 #endif
 
 #if TEST_STD_VER >= 11
Index: test/std/utilities/meta/meta.trans/meta.trans.sign/make_signed.pass.cpp
===================================================================
--- test/std/utilities/meta/meta.trans/meta.trans.sign/make_signed.pass.cpp
+++ test/std/utilities/meta/meta.trans/meta.trans.sign/make_signed.pass.cpp
@@ -13,9 +13,15 @@
 
 #include <type_traits>
 
+#include "test_macros.h"
+
 enum Enum {zero, one_};
 
+#if TEST_STD_VER >= 11
+enum BigEnum : unsigned long long // MSVC's ABI doesn't follow the Standard
+#else
 enum BigEnum
+#endif
 {
     bigzero,
     big = 0xFFFFFFFFFFFFFFFFULL
Index: test/std/utilities/meta/meta.trans/meta.trans.sign/make_unsigned.pass.cpp
===================================================================
--- test/std/utilities/meta/meta.trans/meta.trans.sign/make_unsigned.pass.cpp
+++ test/std/utilities/meta/meta.trans/meta.trans.sign/make_unsigned.pass.cpp
@@ -13,9 +13,15 @@
 
 #include <type_traits>
 
+#include "test_macros.h"
+
 enum Enum {zero, one_};
 
+#if TEST_STD_VER >= 11
+enum BigEnum : unsigned long long // MSVC's ABI doesn't follow the Standard
+#else
 enum BigEnum
+#endif
 {
     bigzero,
     big = 0xFFFFFFFFFFFFFFFFULL