diff --git a/test/std/utilities/meta/meta.trans/meta.trans.other/underlying_type.pass.cpp b/test/std/utilities/meta/meta.trans/meta.trans.other/underlying_type.pass.cpp
index 1d7b23c19..452b85174 100644
--- a/test/std/utilities/meta/meta.trans/meta.trans.other/underlying_type.pass.cpp
+++ b/test/std/utilities/meta/meta.trans/meta.trans.other/underlying_type.pass.cpp
@@ -21,14 +21,19 @@ enum F { W = UINT_MAX };
 
 int main()
 {
+#if !defined(_WIN32) || defined(__MINGW32__)
+    typedef unsigned ExpectUnsigned;
+#else
+    typedef int ExpectUnsigned; // MSVC's ABI doesn't follow the Standard
+#endif
     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");
+    static_assert((std::is_same<std::underlying_type<F>::type, ExpectUnsigned>::value),
+                  "F has the wrong underlying type"); 
 
-#if _LIBCPP_STD_VER > 11
+#if TEST_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), "");
+    static_assert((std::is_same<std::underlying_type_t<F>, ExpectUnsigned>::value), ""); 
 #endif
 
 #if TEST_STD_VER >= 11
@@ -36,7 +41,7 @@ int main()
 
     static_assert((std::is_same<std::underlying_type<G>::type, char>::value),
                   "G has the wrong underlying type");
-#if _LIBCPP_STD_VER > 11
+#if TEST_STD_VER > 11
     static_assert((std::is_same<std::underlying_type_t<G>, char>::value), "");
 #endif
 #endif // TEST_STD_VER >= 11
diff --git a/test/std/utilities/meta/meta.trans/meta.trans.sign/make_signed.pass.cpp b/test/std/utilities/meta/meta.trans/meta.trans.sign/make_signed.pass.cpp
index eb8e31c76..069202062 100644
--- a/test/std/utilities/meta/meta.trans/meta.trans.sign/make_signed.pass.cpp
+++ b/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
diff --git a/test/std/utilities/meta/meta.trans/meta.trans.sign/make_unsigned.pass.cpp b/test/std/utilities/meta/meta.trans/meta.trans.sign/make_unsigned.pass.cpp
index 984440193..41ffdaa72 100644
--- a/test/std/utilities/meta/meta.trans/meta.trans.sign/make_unsigned.pass.cpp
+++ b/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