diff --git a/libcxx/include/__config b/libcxx/include/__config
--- a/libcxx/include/__config
+++ b/libcxx/include/__config
@@ -510,10 +510,6 @@
 #define _LIBCPP_COMPILER_HAS_BUILTIN_CONSTANT_P
 #endif
 
-#if !__is_identifier(__has_unique_object_representations)
-#define _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS
-#endif
-
 #define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
 
 // Literal operators ""d and ""y are supported starting with LLVM Clang 8 and AppleClang 10.0.1
@@ -552,7 +548,6 @@
 #if _GNUC_VER >= 700
 #define _LIBCPP_COMPILER_HAS_BUILTIN_LAUNDER
 #define _LIBCPP_COMPILER_HAS_BUILTIN_CONSTANT_P
-#define _LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS
 #endif
 
 #define _LIBCPP_ALWAYS_INLINE __attribute__ ((__always_inline__))
diff --git a/libcxx/include/type_traits b/libcxx/include/type_traits
--- a/libcxx/include/type_traits
+++ b/libcxx/include/type_traits
@@ -1914,7 +1914,7 @@
 
 // has_unique_object_representations
 
-#if _LIBCPP_STD_VER > 14 && defined(_LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS)
+#if _LIBCPP_STD_VER > 14
 
 template <class _Tp> struct _LIBCPP_TEMPLATE_VIS has_unique_object_representations
     : public integral_constant<bool,
diff --git a/libcxx/include/version b/libcxx/include/version
--- a/libcxx/include/version
+++ b/libcxx/include/version
@@ -222,9 +222,7 @@
 # endif
 # define __cpp_lib_gcd_lcm                              201606L
 // # define __cpp_lib_hardware_interference_size           201703L
-# if defined(_LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS)
-#   define __cpp_lib_has_unique_object_representations  201606L
-# endif
+# define __cpp_lib_has_unique_object_representations    201606L
 # define __cpp_lib_hypot                                201603L
 # define __cpp_lib_incomplete_container_elements        201505L
 # define __cpp_lib_invoke                               201411L
diff --git a/libcxx/test/std/language.support/support.limits/support.limits.general/type_traits.version.pass.cpp b/libcxx/test/std/language.support/support.limits/support.limits.general/type_traits.version.pass.cpp
--- a/libcxx/test/std/language.support/support.limits/support.limits.general/type_traits.version.pass.cpp
+++ b/libcxx/test/std/language.support/support.limits/support.limits.general/type_traits.version.pass.cpp
@@ -233,17 +233,11 @@
 #   error "__cpp_lib_bounded_array_traits should not be defined before c++20"
 # endif
 
-# if TEST_HAS_BUILTIN_IDENTIFIER(__has_unique_object_representations) || TEST_GCC_VER >= 700
-#   ifndef __cpp_lib_has_unique_object_representations
-#     error "__cpp_lib_has_unique_object_representations should be defined in c++17"
-#   endif
-#   if __cpp_lib_has_unique_object_representations != 201606L
-#     error "__cpp_lib_has_unique_object_representations should have the value 201606L in c++17"
-#   endif
-# else
-#   ifdef __cpp_lib_has_unique_object_representations
-#     error "__cpp_lib_has_unique_object_representations should not be defined when TEST_HAS_BUILTIN_IDENTIFIER(__has_unique_object_representations) || TEST_GCC_VER >= 700 is not defined!"
-#   endif
+# ifndef __cpp_lib_has_unique_object_representations
+#   error "__cpp_lib_has_unique_object_representations should be defined in c++17"
+# endif
+# if __cpp_lib_has_unique_object_representations != 201606L
+#   error "__cpp_lib_has_unique_object_representations should have the value 201606L in c++17"
 # endif
 
 # ifndef __cpp_lib_integral_constant_callable
@@ -369,17 +363,11 @@
 #   error "__cpp_lib_bounded_array_traits should have the value 201902L in c++20"
 # endif
 
-# if TEST_HAS_BUILTIN_IDENTIFIER(__has_unique_object_representations) || TEST_GCC_VER >= 700
-#   ifndef __cpp_lib_has_unique_object_representations
-#     error "__cpp_lib_has_unique_object_representations should be defined in c++20"
-#   endif
-#   if __cpp_lib_has_unique_object_representations != 201606L
-#     error "__cpp_lib_has_unique_object_representations should have the value 201606L in c++20"
-#   endif
-# else
-#   ifdef __cpp_lib_has_unique_object_representations
-#     error "__cpp_lib_has_unique_object_representations should not be defined when TEST_HAS_BUILTIN_IDENTIFIER(__has_unique_object_representations) || TEST_GCC_VER >= 700 is not defined!"
-#   endif
+# ifndef __cpp_lib_has_unique_object_representations
+#   error "__cpp_lib_has_unique_object_representations should be defined in c++20"
+# endif
+# if __cpp_lib_has_unique_object_representations != 201606L
+#   error "__cpp_lib_has_unique_object_representations should have the value 201606L in c++20"
 # endif
 
 # ifndef __cpp_lib_integral_constant_callable
@@ -538,17 +526,11 @@
 #   error "__cpp_lib_bounded_array_traits should have the value 201902L in c++2b"
 # endif
 
-# if TEST_HAS_BUILTIN_IDENTIFIER(__has_unique_object_representations) || TEST_GCC_VER >= 700
-#   ifndef __cpp_lib_has_unique_object_representations
-#     error "__cpp_lib_has_unique_object_representations should be defined in c++2b"
-#   endif
-#   if __cpp_lib_has_unique_object_representations != 201606L
-#     error "__cpp_lib_has_unique_object_representations should have the value 201606L in c++2b"
-#   endif
-# else
-#   ifdef __cpp_lib_has_unique_object_representations
-#     error "__cpp_lib_has_unique_object_representations should not be defined when TEST_HAS_BUILTIN_IDENTIFIER(__has_unique_object_representations) || TEST_GCC_VER >= 700 is not defined!"
-#   endif
+# ifndef __cpp_lib_has_unique_object_representations
+#   error "__cpp_lib_has_unique_object_representations should be defined in c++2b"
+# endif
+# if __cpp_lib_has_unique_object_representations != 201606L
+#   error "__cpp_lib_has_unique_object_representations should have the value 201606L in c++2b"
 # endif
 
 # ifndef __cpp_lib_integral_constant_callable
diff --git a/libcxx/test/std/language.support/support.limits/support.limits.general/version.version.pass.cpp b/libcxx/test/std/language.support/support.limits/support.limits.general/version.version.pass.cpp
--- a/libcxx/test/std/language.support/support.limits/support.limits.general/version.version.pass.cpp
+++ b/libcxx/test/std/language.support/support.limits/support.limits.general/version.version.pass.cpp
@@ -1600,17 +1600,11 @@
 #   endif
 # endif
 
-# if TEST_HAS_BUILTIN_IDENTIFIER(__has_unique_object_representations) || TEST_GCC_VER >= 700
-#   ifndef __cpp_lib_has_unique_object_representations
-#     error "__cpp_lib_has_unique_object_representations should be defined in c++17"
-#   endif
-#   if __cpp_lib_has_unique_object_representations != 201606L
-#     error "__cpp_lib_has_unique_object_representations should have the value 201606L in c++17"
-#   endif
-# else
-#   ifdef __cpp_lib_has_unique_object_representations
-#     error "__cpp_lib_has_unique_object_representations should not be defined when TEST_HAS_BUILTIN_IDENTIFIER(__has_unique_object_representations) || TEST_GCC_VER >= 700 is not defined!"
-#   endif
+# ifndef __cpp_lib_has_unique_object_representations
+#   error "__cpp_lib_has_unique_object_representations should be defined in c++17"
+# endif
+# if __cpp_lib_has_unique_object_representations != 201606L
+#   error "__cpp_lib_has_unique_object_representations should have the value 201606L in c++17"
 # endif
 
 # ifndef __cpp_lib_hypot
@@ -2619,17 +2613,11 @@
 #   endif
 # endif
 
-# if TEST_HAS_BUILTIN_IDENTIFIER(__has_unique_object_representations) || TEST_GCC_VER >= 700
-#   ifndef __cpp_lib_has_unique_object_representations
-#     error "__cpp_lib_has_unique_object_representations should be defined in c++20"
-#   endif
-#   if __cpp_lib_has_unique_object_representations != 201606L
-#     error "__cpp_lib_has_unique_object_representations should have the value 201606L in c++20"
-#   endif
-# else
-#   ifdef __cpp_lib_has_unique_object_representations
-#     error "__cpp_lib_has_unique_object_representations should not be defined when TEST_HAS_BUILTIN_IDENTIFIER(__has_unique_object_representations) || TEST_GCC_VER >= 700 is not defined!"
-#   endif
+# ifndef __cpp_lib_has_unique_object_representations
+#   error "__cpp_lib_has_unique_object_representations should be defined in c++20"
+# endif
+# if __cpp_lib_has_unique_object_representations != 201606L
+#   error "__cpp_lib_has_unique_object_representations should have the value 201606L in c++20"
 # endif
 
 # ifndef __cpp_lib_hypot
@@ -3800,17 +3788,11 @@
 #   endif
 # endif
 
-# if TEST_HAS_BUILTIN_IDENTIFIER(__has_unique_object_representations) || TEST_GCC_VER >= 700
-#   ifndef __cpp_lib_has_unique_object_representations
-#     error "__cpp_lib_has_unique_object_representations should be defined in c++2b"
-#   endif
-#   if __cpp_lib_has_unique_object_representations != 201606L
-#     error "__cpp_lib_has_unique_object_representations should have the value 201606L in c++2b"
-#   endif
-# else
-#   ifdef __cpp_lib_has_unique_object_representations
-#     error "__cpp_lib_has_unique_object_representations should not be defined when TEST_HAS_BUILTIN_IDENTIFIER(__has_unique_object_representations) || TEST_GCC_VER >= 700 is not defined!"
-#   endif
+# ifndef __cpp_lib_has_unique_object_representations
+#   error "__cpp_lib_has_unique_object_representations should be defined in c++2b"
+# endif
+# if __cpp_lib_has_unique_object_representations != 201606L
+#   error "__cpp_lib_has_unique_object_representations should have the value 201606L in c++2b"
 # endif
 
 # ifndef __cpp_lib_hypot
diff --git a/libcxx/utils/generate_feature_test_macro_components.py b/libcxx/utils/generate_feature_test_macro_components.py
--- a/libcxx/utils/generate_feature_test_macro_components.py
+++ b/libcxx/utils/generate_feature_test_macro_components.py
@@ -323,8 +323,6 @@
     "name": "__cpp_lib_has_unique_object_representations",
     "values": { "c++17": 201606 },
     "headers": ["type_traits"],
-    "test_suite_guard": "TEST_HAS_BUILTIN_IDENTIFIER(__has_unique_object_representations) || TEST_GCC_VER >= 700",
-    "libcxx_guard": "defined(_LIBCPP_HAS_UNIQUE_OBJECT_REPRESENTATIONS)",
   }, {
     "name": "__cpp_lib_hypot",
     "values": { "c++17": 201603 },