diff --git a/stl/inc/xutility b/stl/inc/xutility
index 9c82bb27c55..b67ee654df1 100644
--- a/stl/inc/xutility
+++ b/stl/inc/xutility
@@ -815,44 +815,34 @@ concept sized_sentinel_for = sentinel_for<_Se, _It>
 // clang-format on
 
 // ALIAS TEMPLATE _Iter_concept
-template <class _It, bool _NotSpec = _Is_from_primary<iterator_traits<_It>>>
-struct _Iter_concept_impl {};
-
-// clang-format off
-template <class _It>
-    requires _Has_member_iterator_concept<iterator_traits<_It>>
-struct _Iter_concept_impl<_It, false> {
-    using type = typename iterator_traits<_It>::iterator_concept;
-};
-
-template <class _It>
-    requires (!_Has_member_iterator_concept<iterator_traits<_It>>
-        && _Has_member_iterator_category<iterator_traits<_It>>)
-struct _Iter_concept_impl<_It, false> {
-    using type = typename iterator_traits<_It>::iterator_category;
+template <bool _Iterator_category_present>
+struct _Iter_concept_impl2 {
+    template <class _It, class _Traits>
+    using _Apply = typename _Traits::iterator_category;
 };
-// clang-format on
-
-template <class _It>
-struct _Iter_concept_impl<_It, true> {
-    using type = random_access_iterator_tag;
+template <>
+struct _Iter_concept_impl2<false> {
+    // clang-format off
+    template <class _It, class _Traits>
+        requires _Is_from_primary<iterator_traits<_It>>
+    using _Apply = random_access_iterator_tag;
+    // clang-format on
 };
 
-template <_Has_member_iterator_concept _It>
-struct _Iter_concept_impl<_It, true> {
-    using type = typename _It::iterator_concept;
+template <bool _Iterator_concept_present>
+struct _Iter_concept_impl1 {
+    template <class _It, class _Traits>
+    using _Apply = typename _Traits::iterator_concept;
 };
-
-// clang-format off
-template <class _It>
-    requires(!_Has_member_iterator_concept<_It> && _Has_member_iterator_category<_It>)
-struct _Iter_concept_impl<_It, true> {
-    using type = typename _It::iterator_category;
+template <>
+struct _Iter_concept_impl1<false> {
+    template <class _It, class _Traits>
+    using _Apply = typename _Iter_concept_impl2<_Has_member_iterator_category<_Traits>>::template _Apply<_It, _Traits>;
 };
-// clang-format on
 
-template <class _It>
-using _Iter_concept = typename _Iter_concept_impl<_It>::type;
+template <class _It, class _Traits = conditional_t<_Is_from_primary<iterator_traits<_It>>, _It, iterator_traits<_It>>>
+using _Iter_concept =
+    typename _Iter_concept_impl1<_Has_member_iterator_concept<_Traits>>::template _Apply<_It, _Traits>;
 
 // clang-format off
 // CONCEPT input_iterator
@@ -4090,14 +4080,24 @@ public:
         return _Left._Current - _Right._Get_last();
     }
 
-    _NODISCARD friend constexpr reference iter_move(const move_iterator& _It) noexcept(
-        noexcept(_RANGES iter_move(_It._Current))) {
+    _NODISCARD friend constexpr reference iter_move(const move_iterator& _It)
+#ifdef __EDG__ // TRANSITION, VSO-1132105
+        noexcept(noexcept(_RANGES iter_move(_STD declval<const _Iter&>())))
+#else // ^^^ workaround / no workaround vvv
+        noexcept(noexcept(_RANGES iter_move(_It._Current)))
+#endif // TRANSITION, VSO-1132105
+    {
         return _RANGES iter_move(_It._Current);
     }
 
     template <indirectly_swappable<_Iter> _Iter2>
-    friend constexpr void iter_swap(const move_iterator& _Left, const move_iterator<_Iter2>& _Right) noexcept(
-        noexcept(_RANGES iter_swap(_Left._Current, _Right.base()))) {
+    friend constexpr void iter_swap(const move_iterator& _Left, const move_iterator<_Iter2>& _Right)
+#ifdef __EDG__ // TRANSITION, VSO-1132105
+        noexcept(noexcept(_RANGES iter_swap(_STD declval<const _Iter&>(), _STD declval<const _Iter2&>())))
+#else // ^^^ workaround / no workaround vvv
+        noexcept(noexcept(_RANGES iter_swap(_Left._Current, _Right.base())))
+#endif // TRANSITION, VSO-1132105
+    {
         _RANGES iter_swap(_Left._Current, _Right.base());
     }
 #endif // __cpp_lib_concepts
diff --git a/tests/std/tests/P0088R3_variant/test.cpp b/tests/std/tests/P0088R3_variant/test.cpp
index 2cf2dd5210d..20c045972e5 100644
--- a/tests/std/tests/P0088R3_variant/test.cpp
+++ b/tests/std/tests/P0088R3_variant/test.cpp
@@ -6481,6 +6481,7 @@ namespace msvc {
 
     namespace derived_variant {
         void run_test() {
+#ifndef __EDG__ // TRANSITION, VSO-1178211
             // Extension: std::visit accepts types derived from a specialization of variant.
             {
                 struct my_variant : std::variant<int, char, double> {
@@ -6533,6 +6534,7 @@ namespace msvc {
                 } catch (std::bad_variant_access&) {
                 }
             }
+#endif // TRANSITION, VSO-1178211
         }
     } // namespace derived_variant
 
diff --git a/tests/std/tests/P0896R4_ranges_alg_find_end/test.cpp b/tests/std/tests/P0896R4_ranges_alg_find_end/test.cpp
index 06dae11031f..81880bacca8 100644
--- a/tests/std/tests/P0896R4_ranges_alg_find_end/test.cpp
+++ b/tests/std/tests/P0896R4_ranges_alg_find_end/test.cpp
@@ -76,6 +76,7 @@ int main() {
     smoke_test();
 }
 
+#ifndef _PREFAST_ // TRANSITION, GH-1030
 struct instantiator {
     template <class Fwd1, class Fwd2>
     static void call(Fwd1&& fwd1 = {}, Fwd2&& fwd2 = {}) {
@@ -107,3 +108,4 @@ struct instantiator {
 };
 
 template void test_fwd_fwd<instantiator, const int, const int>();
+#endif // TRANSITION, GH-1030
diff --git a/tests/std/tests/P0896R4_ranges_alg_mismatch/test.cpp b/tests/std/tests/P0896R4_ranges_alg_mismatch/test.cpp
index 51a0b864436..2ee68e9a70b 100644
--- a/tests/std/tests/P0896R4_ranges_alg_mismatch/test.cpp
+++ b/tests/std/tests/P0896R4_ranges_alg_mismatch/test.cpp
@@ -71,12 +71,11 @@ constexpr void smoke_test() {
 }
 
 int main() {
-#ifndef _PREFAST_ // TRANSITION, GH-1030
     STATIC_ASSERT((smoke_test(), true));
-#endif // TRANSITION, GH-1030
     smoke_test();
 }
 
+#ifndef _PREFAST_ // TRANSITION, GH-1030
 struct instantiator {
     template <class In1, class In2>
     static void call(In1&& in1 = {}, In2&& in2 = {}) {
@@ -105,3 +104,4 @@ struct instantiator {
 };
 
 template void test_in_in<instantiator, const int, const int>();
+#endif // TRANSITION, GH-1030