diff --git a/impl/any_view/test/iterator/bidirectional.cpp b/impl/any_view/test/iterator/bidirectional.cpp
index 26198e1..e4cd7c2 100644
--- a/impl/any_view/test/iterator/bidirectional.cpp
+++ b/impl/any_view/test/iterator/bidirectional.cpp
@@ -10,7 +10,7 @@ namespace {
 
 using AnyView =
     std::ranges::any_view<int&, std::ranges::category::bidirectional>;
-using Iter = AnyView::any_iterator;
+using Iter = std::ranges::iterator_t<AnyView>;
 
 static_assert(std::bidirectional_iterator<Iter>);
 static_assert(!std::random_access_iterator<Iter>);
@@ -29,9 +29,10 @@ static_assert(std::same_as<typename std::iterator_traits<Iter>::difference_type,
                            ptrdiff_t>);
 
 constexpr void basic() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter(v.begin());
+  Iter iter = v.begin();
   {
     std::same_as<int&> decltype(auto) r = *iter;
     assert(r == 1);
@@ -56,9 +57,10 @@ constexpr void basic() {
 }
 
 constexpr void move() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter1(v.begin());
+  Iter iter1 = v.begin();
   Iter iter2(std::move(iter1));
 
   assert(*iter1 == 1);
@@ -75,9 +77,10 @@ constexpr void move() {
 }
 
 constexpr void copy() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter1(v.begin());
+  Iter iter1 = v.begin();
   Iter iter2(iter1);
 
   assert(*iter1 == 1);
@@ -94,8 +97,10 @@ constexpr void copy() {
 }
 
 constexpr void equal() {
-  std::array v{1, 2, 3, 4, 5};
-  Iter iter1(v.begin());
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
+
+  Iter iter1 = v.begin();
   Iter iter2(iter1);
 
   std::same_as<bool> decltype(auto) r = iter1 == iter2;
@@ -106,9 +111,10 @@ constexpr void equal() {
 }
 
 constexpr void decrement() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter(v.begin());
+  Iter iter = v.begin();
   ++iter;
   ++iter;
   ++iter;
diff --git a/impl/any_view/test/iterator/forward.cpp b/impl/any_view/test/iterator/forward.cpp
index 02035aa..ebfe73f 100644
--- a/impl/any_view/test/iterator/forward.cpp
+++ b/impl/any_view/test/iterator/forward.cpp
@@ -9,7 +9,7 @@
 namespace {
 
 using AnyView = std::ranges::any_view<int&, std::ranges::category::forward>;
-using Iter = AnyView::any_iterator;
+using Iter = std::ranges::iterator_t<AnyView>;
 
 static_assert(std::forward_iterator<Iter>);
 static_assert(!std::bidirectional_iterator<Iter>);
@@ -28,9 +28,10 @@ static_assert(std::same_as<typename std::iterator_traits<Iter>::difference_type,
                            ptrdiff_t>);
 
 constexpr void basic() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter(v.begin());
+  Iter iter = v.begin();
   {
     std::same_as<int&> decltype(auto) r = *iter;
     assert(r == 1);
@@ -55,9 +56,10 @@ constexpr void basic() {
 }
 
 constexpr void default_ctor() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter(v.begin());
+  Iter iter = v.begin();
 
   Iter iter1, iter2;
 
@@ -69,9 +71,10 @@ constexpr void default_ctor() {
 }
 
 constexpr void move() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter1(v.begin());
+  Iter iter1 = v.begin();
   Iter iter2(std::move(iter1));
 
   assert(*iter1 == 1);
@@ -88,9 +91,10 @@ constexpr void move() {
 }
 
 constexpr void copy() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter1(v.begin());
+  Iter iter1 = v.begin();
   Iter iter2(iter1);
 
   assert(*iter1 == 1);
@@ -107,8 +111,9 @@ constexpr void copy() {
 }
 
 constexpr void equal() {
-  std::array v{1, 2, 3, 4, 5};
-  Iter iter1(v.begin());
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
+  Iter iter1 = v.begin();
   Iter iter2(iter1);
 
   std::same_as<bool> decltype(auto) r = iter1 == iter2;
diff --git a/impl/any_view/test/iterator/input.cpp b/impl/any_view/test/iterator/input.cpp
index d58ce7b..77ee842 100644
--- a/impl/any_view/test/iterator/input.cpp
+++ b/impl/any_view/test/iterator/input.cpp
@@ -10,7 +10,7 @@
 namespace {
 
 using AnyView = std::ranges::any_view<int&, std::ranges::category::input>;
-using Iter = AnyView::any_iterator;
+using Iter = std::ranges::iterator_t<AnyView>;
 
 static_assert(std::input_iterator<Iter>);
 static_assert(!std::forward_iterator<Iter>);
@@ -24,9 +24,10 @@ concept has_iterator_category = requires() { typename T::iterator_category; };
 static_assert(!has_iterator_category<Iter>);
 
 constexpr void basic() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter(v.begin());
+  Iter iter =v.begin();
   {
     std::same_as<int&> decltype(auto) r = *iter;
     assert(r == 1);
@@ -51,9 +52,10 @@ constexpr void basic() {
 }
 
 constexpr void move() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter1(v.begin());
+  Iter iter1 = v.begin();
   Iter iter2(std::move(iter1));
 
   assert(*iter1 == 1);
diff --git a/impl/any_view/test/iterator/input_common.cpp b/impl/any_view/test/iterator/input_common.cpp
index b77fe6f..31c70fd 100644
--- a/impl/any_view/test/iterator/input_common.cpp
+++ b/impl/any_view/test/iterator/input_common.cpp
@@ -11,7 +11,7 @@ namespace {
 
 using AnyView = std::ranges::any_view<int&, std::ranges::category::input |
                                                 std::ranges::category::common>;
-using Iter = AnyView::any_iterator;
+using Iter = std::ranges::iterator_t<AnyView>;
 
 static_assert(std::input_iterator<Iter>);
 static_assert(!std::forward_iterator<Iter>);
@@ -25,9 +25,10 @@ concept has_iterator_category = requires() { typename T::iterator_category; };
 static_assert(!has_iterator_category<Iter>);
 
 constexpr void basic() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter(v.begin());
+  Iter iter = v.begin();
   {
     std::same_as<int&> decltype(auto) r = *iter;
     assert(r == 1);
@@ -52,9 +53,10 @@ constexpr void basic() {
 }
 
 constexpr void move() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter1(v.begin());
+  Iter iter1 = v.begin();
   Iter iter2(std::move(iter1));
 
   assert(*iter1 == 1);
@@ -71,9 +73,10 @@ constexpr void move() {
 }
 
 constexpr void copy() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter1(v.begin());
+  Iter iter1 = v.begin();
   Iter iter2(iter1);
 
   assert(*iter1 == 1);
@@ -90,9 +93,11 @@ constexpr void copy() {
 }
 
 constexpr void equal() {
-  std::array v{1, 2, 3, 4, 5};
-  Iter iter1(v.begin());
-  Iter iter2(v.begin());
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
+
+  Iter iter1 = v.begin();
+  Iter iter2 = v.begin();
 
   std::same_as<bool> decltype(auto) r = iter1 == iter2;
   assert(r);
diff --git a/impl/any_view/test/iterator/random_access.cpp b/impl/any_view/test/iterator/random_access.cpp
index 96c1a66..9fbad1c 100644
--- a/impl/any_view/test/iterator/random_access.cpp
+++ b/impl/any_view/test/iterator/random_access.cpp
@@ -10,7 +10,7 @@ namespace {
 
 using AnyView =
     std::ranges::any_view<int&, std::ranges::category::random_access>;
-using Iter = AnyView::any_iterator;
+using Iter = std::ranges::iterator_t<AnyView>;
 
 static_assert(std::random_access_iterator<Iter>);
 static_assert(!std::contiguous_iterator<Iter>);
@@ -29,9 +29,10 @@ static_assert(std::same_as<typename std::iterator_traits<Iter>::difference_type,
                            ptrdiff_t>);
 
 constexpr void basic() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter(v.begin());
+  Iter iter = v.begin();
   {
     std::same_as<int&> decltype(auto) r = *iter;
     assert(r == 1);
@@ -56,9 +57,10 @@ constexpr void basic() {
 }
 
 constexpr void move() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter1(v.begin());
+  Iter iter1 = v.begin();
   Iter iter2(std::move(iter1));
 
   assert(*iter1 == 1);
@@ -75,9 +77,10 @@ constexpr void move() {
 }
 
 constexpr void copy() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter1(v.begin());
+  Iter iter1 = v.begin();
   Iter iter2(iter1);
 
   assert(*iter1 == 1);
@@ -94,8 +97,10 @@ constexpr void copy() {
 }
 
 constexpr void equal() {
-  std::array v{1, 2, 3, 4, 5};
-  Iter iter1(v.begin());
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
+
+  Iter iter1 = v.begin();
   Iter iter2(iter1);
 
   std::same_as<bool> decltype(auto) r = iter1 == iter2;
@@ -106,9 +111,10 @@ constexpr void equal() {
 }
 
 constexpr void decrement() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter(v.begin());
+  Iter iter = v.begin();
   ++iter;
   ++iter;
   ++iter;
@@ -129,9 +135,10 @@ constexpr void decrement() {
 }
 
 constexpr void random_access() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter(v.begin());
+  Iter iter = v.begin();
 
   {
     std::same_as<Iter&> decltype(auto) r = iter += 3;
@@ -183,9 +190,10 @@ constexpr void random_access() {
 }
 
 constexpr void compare() {
-  std::array v{1, 2, 3, 4, 5};
+  std::array a{1, 2, 3, 4, 5};
+  AnyView v(std::views::all(a));
 
-  Iter iter1(v.begin());
+  Iter iter1 = v.begin();
   Iter iter1_copy = iter1;
 
   Iter iter4(v.begin() + 3);