diff --git a/libcxx/test/std/strings/string.view/char.bad.fail.cpp b/libcxx/test/std/strings/string.view/char.bad.fail.cpp
--- a/libcxx/test/std/strings/string.view/char.bad.fail.cpp
+++ b/libcxx/test/std/strings/string.view/char.bad.fail.cpp
@@ -9,6 +9,8 @@
 // <string_view>
 //   ... manipulating sequences of any non-array trivial standard-layout types.
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string>
 #include "../basic.string/test_traits.h"
 
diff --git a/libcxx/test/std/strings/string.view/string.view.hash/char_type.hash.fail.cpp b/libcxx/test/std/strings/string.view/string.view.hash/char_type.hash.fail.cpp
--- a/libcxx/test/std/strings/string.view/string.view.hash/char_type.hash.fail.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.hash/char_type.hash.fail.cpp
@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03
+// UNSUPPORTED: !stdlib=libc++ && (c++11 || c++14)
 
 // <string_view>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.hash/enabled_hashes.pass.cpp b/libcxx/test/std/strings/string.view/string.view.hash/enabled_hashes.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.hash/enabled_hashes.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.hash/enabled_hashes.pass.cpp
@@ -7,6 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 // UNSUPPORTED: c++03
+// UNSUPPORTED: !stdlib=libc++ && (c++11 || c++14)
 
 // <string_view>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.hash/string_view.pass.cpp b/libcxx/test/std/strings/string.view/string.view.hash/string_view.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.hash/string_view.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.hash/string_view.pass.cpp
@@ -15,6 +15,8 @@
 //     size_t operator()(T val) const;
 // };
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 // Not very portable
 
 #include <string_view>
diff --git a/libcxx/test/std/strings/string.view/string.view.access/back.pass.cpp b/libcxx/test/std/strings/string.view/string.view.access/back.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.access/back.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.access/back.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr const _CharT& front();
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.access/data.pass.cpp b/libcxx/test/std/strings/string.view/string.view.access/data.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.access/data.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.access/data.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr const _CharT* data() const noexcept;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.access/front.pass.cpp b/libcxx/test/std/strings/string.view/string.view.access/front.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.access/front.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.access/front.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr const _CharT& back();
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.access/index.pass.cpp b/libcxx/test/std/strings/string.view/string.view.access/index.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.access/index.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.access/index.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr const _CharT& operator[](size_type _pos) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.capacity/capacity.pass.cpp b/libcxx/test/std/strings/string.view/string.view.capacity/capacity.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.capacity/capacity.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.capacity/capacity.pass.cpp
@@ -14,6 +14,8 @@
 // constexpr size_type max_size() const noexcept;
 // constexpr bool empty()         const noexcept;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 #include <limits>
diff --git a/libcxx/test/std/strings/string.view/string.view.comparison/equal.pass.cpp b/libcxx/test/std/strings/string.view/string.view.comparison/equal.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.comparison/equal.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.comparison/equal.pass.cpp
@@ -12,6 +12,8 @@
 //   constexpr bool operator==(basic_string_view<charT, traits> lhs, basic_string_view<charT, traits> rhs);
 // (plus "sufficient additional overloads" to make implicit conversions work as intended)
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 #include <string>
diff --git a/libcxx/test/std/strings/string.view/string.view.comparison/greater.pass.cpp b/libcxx/test/std/strings/string.view/string.view.comparison/greater.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.comparison/greater.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.comparison/greater.pass.cpp
@@ -12,6 +12,8 @@
 //   constexpr bool operator>(basic_string_view<charT, traits> lhs, basic_string_view<charT, traits> rhs);
 // (plus "sufficient additional overloads" to make implicit conversions work as intended)
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 #include <string>
diff --git a/libcxx/test/std/strings/string.view/string.view.comparison/greater_equal.pass.cpp b/libcxx/test/std/strings/string.view/string.view.comparison/greater_equal.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.comparison/greater_equal.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.comparison/greater_equal.pass.cpp
@@ -12,6 +12,8 @@
 //   constexpr bool operator>=(basic_string_view<charT, traits> lhs, basic_string_view<charT, traits> rhs);
 // (plus "sufficient additional overloads" to make implicit conversions work as intended)
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 #include <string>
diff --git a/libcxx/test/std/strings/string.view/string.view.comparison/less.pass.cpp b/libcxx/test/std/strings/string.view/string.view.comparison/less.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.comparison/less.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.comparison/less.pass.cpp
@@ -12,6 +12,8 @@
 //   constexpr bool operator<(basic_string_view<charT, traits> lhs, basic_string_view<charT, traits> rhs);
 // (plus "sufficient additional overloads" to make implicit conversions work as intended)
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 #include <string>
diff --git a/libcxx/test/std/strings/string.view/string.view.comparison/less_equal.pass.cpp b/libcxx/test/std/strings/string.view/string.view.comparison/less_equal.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.comparison/less_equal.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.comparison/less_equal.pass.cpp
@@ -12,6 +12,8 @@
 //   constexpr bool operator<=(basic_string_view<charT, traits> lhs, basic_string_view<charT, traits> rhs);
 // (plus "sufficient additional overloads" to make implicit conversions work as intended)
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 #include <string>
diff --git a/libcxx/test/std/strings/string.view/string.view.comparison/not_equal.pass.cpp b/libcxx/test/std/strings/string.view/string.view.comparison/not_equal.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.comparison/not_equal.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.comparison/not_equal.pass.cpp
@@ -12,6 +12,8 @@
 //   constexpr bool operator!=(basic_string_view<charT, traits> lhs, basic_string_view<charT, traits> rhs);
 // (plus "sufficient additional overloads" to make implicit conversions work as intended)
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 #include <string>
diff --git a/libcxx/test/std/strings/string.view/string.view.cons/assign.pass.cpp b/libcxx/test/std/strings/string.view/string.view.cons/assign.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.cons/assign.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.cons/assign.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr basic_string_view& operator=(const basic_string_view &) noexcept = default;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.cons/default.pass.cpp b/libcxx/test/std/strings/string.view/string.view.cons/default.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.cons/default.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.cons/default.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr basic_string_view () noexcept;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.cons/from_iterator_sentinel.pass.cpp b/libcxx/test/std/strings/string.view/string.view.cons/from_iterator_sentinel.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.cons/from_iterator_sentinel.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.cons/from_iterator_sentinel.pass.cpp
@@ -12,6 +12,8 @@
 //  template <class It, class End>
 //  constexpr basic_string_view(It begin, End end)
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 #include <iterator>
diff --git a/libcxx/test/std/strings/string.view/string.view.cons/from_literal.pass.cpp b/libcxx/test/std/strings/string.view/string.view.cons/from_literal.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.cons/from_literal.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.cons/from_literal.pass.cpp
@@ -11,6 +11,8 @@
 // constexpr basic_string_view(const _CharT* _s)
 //    : __data (_s), __size(_Traits::length(_s)) {}
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 
 #include <string_view>
 #include <string>
diff --git a/libcxx/test/std/strings/string.view/string.view.cons/from_ptr_len.pass.cpp b/libcxx/test/std/strings/string.view/string.view.cons/from_ptr_len.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.cons/from_ptr_len.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.cons/from_ptr_len.pass.cpp
@@ -11,6 +11,7 @@
 //  constexpr basic_string_view(const _CharT* _s, size_type _len)
 //      : __data (_s), __size(_len) {}
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
 
 #include <string_view>
 #include <string>
diff --git a/libcxx/test/std/strings/string.view/string.view.cons/from_range.pass.cpp b/libcxx/test/std/strings/string.view/string.view.cons/from_range.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.cons/from_range.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.cons/from_range.pass.cpp
@@ -13,6 +13,8 @@
 //  template <class Range>
 //  constexpr basic_string_view(Range&& range);
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <array>
 #include <cassert>
diff --git a/libcxx/test/std/strings/string.view/string.view.cons/from_string.pass.cpp b/libcxx/test/std/strings/string.view/string.view.cons/from_string.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.cons/from_string.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.cons/from_string.pass.cpp
@@ -11,6 +11,7 @@
 // template<class Allocator>
 // basic_string_view(const basic_string<_CharT, _Traits, Allocator>& _str) noexcept
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
 
 #include <string_view>
 #include <string>
diff --git a/libcxx/test/std/strings/string.view/string.view.cons/from_string1.compile.fail.cpp b/libcxx/test/std/strings/string.view/string.view.cons/from_string1.compile.fail.cpp
--- a/libcxx/test/std/strings/string.view/string.view.cons/from_string1.compile.fail.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.cons/from_string1.compile.fail.cpp
@@ -11,6 +11,8 @@
 // template<class Allocator>
 // basic_string_view(const basic_string<_CharT, _Traits, Allocator>& _str) noexcept
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <string>
 #include <cassert>
diff --git a/libcxx/test/std/strings/string.view/string.view.cons/from_string2.compile.fail.cpp b/libcxx/test/std/strings/string.view/string.view.cons/from_string2.compile.fail.cpp
--- a/libcxx/test/std/strings/string.view/string.view.cons/from_string2.compile.fail.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.cons/from_string2.compile.fail.cpp
@@ -11,6 +11,8 @@
 // template<class Allocator>
 // basic_string_view(const basic_string<_CharT, _Traits, Allocator>& _str) noexcept
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <string>
 #include <cassert>
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_char_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_char_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_char_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_char_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr size_type find(charT c, size_type pos = 0) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_first_not_of_char_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_first_not_of_char_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_first_not_of_char_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_first_not_of_char_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr size_type find_first_not_of(charT c, size_type pos = 0) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_first_not_of_pointer_size_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_first_not_of_pointer_size_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_first_not_of_pointer_size_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_first_not_of_pointer_size_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr size_type find_first_not_of(const charT* s, size_type pos, size_type n) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_first_not_of_string_view_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_first_not_of_string_view_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_first_not_of_string_view_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_first_not_of_string_view_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // size_type find_first_not_of(const basic_string& str, size_type pos = 0) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_first_of_char_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_first_of_char_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_first_of_char_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_first_of_char_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr size_type find_first_of(charT c, size_type pos = 0) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_first_of_pointer_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_first_of_pointer_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_first_of_pointer_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_first_of_pointer_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr size_type find_first_of(const charT* s, size_type pos = 0) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_first_of_pointer_size_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_first_of_pointer_size_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_first_of_pointer_size_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_first_of_pointer_size_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr size_type find_first_of(const charT* s, size_type pos, size_type n) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_first_of_string_view_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_first_of_string_view_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_first_of_string_view_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_first_of_string_view_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // size_type find_first_of(const basic_string_view& str, size_type pos = 0) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_char_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_char_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_char_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_char_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // size_type find_last_not_of(charT c, size_type pos = npos) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_pointer_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_pointer_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_pointer_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_pointer_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr size_type find_last_not_of(const charT* s, size_type pos = npos) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_pointer_size_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_pointer_size_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_pointer_size_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_pointer_size_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr size_type find_last_not_of(const charT* s, size_type pos, size_type n) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_string_view_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_string_view_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_string_view_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_last_not_of_string_view_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // size_type find_last_not_of(const basic_string& str, size_type pos = npos) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_last_of_char_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_last_of_char_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_last_of_char_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_last_of_char_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr size_type find_last_of(charT c, size_type pos = npos) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_last_of_pointer_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_last_of_pointer_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_last_of_pointer_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_last_of_pointer_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr size_type find_last_of(const charT* s, size_type pos = npos) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_last_of_pointer_size_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_last_of_pointer_size_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_last_of_pointer_size_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_last_of_pointer_size_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr size_type find_last_of(const charT* s, size_type pos, size_type n) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_last_of_string_view_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_last_of_string_view_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_last_of_string_view_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_last_of_string_view_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // size_type find_last_of(const basic_string& str, size_type pos = npos) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_pointer_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_pointer_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_pointer_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_pointer_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr size_type find(const charT* s, size_type pos = 0) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_pointer_size_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_pointer_size_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_pointer_size_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_pointer_size_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr size_type find(const charT* s, size_type pos, size_type n) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/find_string_view_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/find_string_view_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/find_string_view_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/find_string_view_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr size_type find(const basic_string_view& str, size_type pos = 0) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/rfind_char_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/rfind_char_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/rfind_char_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/rfind_char_size.pass.cpp
@@ -9,6 +9,8 @@
 // <string_view>
 // constexpr size_type rfind(charT c, size_type pos = npos) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/rfind_pointer_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/rfind_pointer_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/rfind_pointer_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/rfind_pointer_size.pass.cpp
@@ -9,6 +9,8 @@
 // <string_view>
 // constexpr size_type rfind(const charT* s, size_type pos = npos) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/rfind_pointer_size_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/rfind_pointer_size_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/rfind_pointer_size_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/rfind_pointer_size_size.pass.cpp
@@ -9,6 +9,8 @@
 // <string_view>
 // constexpr size_type rfind(const charT* s, size_type pos, size_type n) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.find/rfind_string_view_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.find/rfind_string_view_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.find/rfind_string_view_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.find/rfind_string_view_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr size_type rfind(const basic_string& str, size_type pos = npos) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.io/stream_insert_decl_present.compile.pass.cpp b/libcxx/test/std/strings/string.view/string.view.io/stream_insert_decl_present.compile.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.io/stream_insert_decl_present.compile.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.io/stream_insert_decl_present.compile.pass.cpp
@@ -13,6 +13,8 @@
 //   operator<<(basic_ostream<charT, traits>& os,
 //              const basic_string_view<charT,traits> str);
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <iosfwd>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.iterators/begin.pass.cpp b/libcxx/test/std/strings/string.view/string.view.iterators/begin.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.iterators/begin.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.iterators/begin.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr const_iterator begin() const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.iterators/end.pass.cpp b/libcxx/test/std/strings/string.view/string.view.iterators/end.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.iterators/end.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.iterators/end.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr const_iterator end() const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 #include <cstddef>
diff --git a/libcxx/test/std/strings/string.view/string.view.iterators/rbegin.pass.cpp b/libcxx/test/std/strings/string.view/string.view.iterators/rbegin.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.iterators/rbegin.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.iterators/rbegin.pass.cpp
@@ -10,6 +10,8 @@
 
 // const_iterator rbegin() const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.iterators/rend.pass.cpp b/libcxx/test/std/strings/string.view/string.view.iterators/rend.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.iterators/rend.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.iterators/rend.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr const_iterator rend() const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 #include <cstddef>
diff --git a/libcxx/test/std/strings/string.view/string.view.modifiers/remove_prefix.pass.cpp b/libcxx/test/std/strings/string.view/string.view.modifiers/remove_prefix.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.modifiers/remove_prefix.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.modifiers/remove_prefix.pass.cpp
@@ -10,6 +10,8 @@
 
 // void remove_prefix(size_type _n)
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.modifiers/remove_suffix.pass.cpp b/libcxx/test/std/strings/string.view/string.view.modifiers/remove_suffix.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.modifiers/remove_suffix.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.modifiers/remove_suffix.pass.cpp
@@ -10,6 +10,8 @@
 
 // void remove_suffix(size_type _n)
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.modifiers/swap.pass.cpp b/libcxx/test/std/strings/string.view/string.view.modifiers/swap.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.modifiers/swap.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.modifiers/swap.pass.cpp
@@ -10,6 +10,8 @@
 
 // void swap(basic_string_view& _other) noexcept
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.nonmem/quoted.pass.cpp b/libcxx/test/std/strings/string.view/string.view.nonmem/quoted.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.nonmem/quoted.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.nonmem/quoted.pass.cpp
@@ -8,6 +8,7 @@
 
 // UNSUPPORTED: c++03, c++11
 // UNSUPPORTED: no-localization
+// UNSUPPORTED: !stdlib=libc++ && c++14
 
 // <iomanip>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.ops/compare.pointer.pass.cpp b/libcxx/test/std/strings/string.view/string.view.ops/compare.pointer.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.ops/compare.pointer.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.ops/compare.pointer.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr int compare(const charT* s) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.ops/compare.pointer_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.ops/compare.pointer_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.ops/compare.pointer_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.ops/compare.pointer_size.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr int compare(size_type pos1, size_type n1, const charT* s) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 #include <stdexcept>
diff --git a/libcxx/test/std/strings/string.view/string.view.ops/compare.size_size_sv.pass.cpp b/libcxx/test/std/strings/string.view/string.view.ops/compare.size_size_sv.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.ops/compare.size_size_sv.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.ops/compare.size_size_sv.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr int compare(size_type pos1, size_type n1, basic_string_view str) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 #include <stdexcept>
diff --git a/libcxx/test/std/strings/string.view/string.view.ops/compare.size_size_sv_pointer_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.ops/compare.size_size_sv_pointer_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.ops/compare.size_size_sv_pointer_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.ops/compare.size_size_sv_pointer_size.pass.cpp
@@ -11,6 +11,8 @@
 // constexpr int compare(size_type pos1, size_type n1,
 //             const charT* s, size_type n2) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 #include <stdexcept>
diff --git a/libcxx/test/std/strings/string.view/string.view.ops/compare.size_size_sv_size_size.pass.cpp b/libcxx/test/std/strings/string.view/string.view.ops/compare.size_size_sv_size_size.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.ops/compare.size_size_sv_size_size.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.ops/compare.size_size_sv_size_size.pass.cpp
@@ -11,6 +11,8 @@
 // constexpr int compare(size_type pos1, size_type n1, basic_string_view str,
 //             size_type pos2, size_type n2) const;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 #include <stdexcept>
diff --git a/libcxx/test/std/strings/string.view/string.view.ops/compare.sv.pass.cpp b/libcxx/test/std/strings/string.view/string.view.ops/compare.sv.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.ops/compare.sv.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.ops/compare.sv.pass.cpp
@@ -10,6 +10,8 @@
 
 // constexpr int compare(basic_string_view str) const noexcept;
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <cassert>
 
diff --git a/libcxx/test/std/strings/string.view/string.view.ops/copy.pass.cpp b/libcxx/test/std/strings/string.view/string.view.ops/copy.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.ops/copy.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.ops/copy.pass.cpp
@@ -16,6 +16,7 @@
 // Effects: Equivalent to std::copy_n(begin() + pos, rlen, s).
 // Returns: rlen.
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
 
 #include <string_view>
 #include <algorithm>
diff --git a/libcxx/test/std/strings/string.view/string.view.ops/substr.pass.cpp b/libcxx/test/std/strings/string.view/string.view.ops/substr.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.ops/substr.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.ops/substr.pass.cpp
@@ -14,6 +14,8 @@
 // Effects: Determines the effective length rlen of the string to reference as the smaller of n and size() - pos.
 // Returns: basic_string_view(data()+pos, rlen).
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <algorithm>
 #include <stdexcept>
diff --git a/libcxx/test/std/strings/string.view/string.view.template/ends_with.ptr.pass.cpp b/libcxx/test/std/strings/string.view/string.view.template/ends_with.ptr.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.template/ends_with.ptr.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.template/ends_with.ptr.pass.cpp
@@ -26,9 +26,9 @@
     SV  sv0 {};
     SV  sv1 { s + 4, 1 };
     SV  sv2 { s + 3, 2 };
-//     SV  sv3 { s + 2, 3 };
-//     SV  sv4 { s + 1, 4 };
-//     SV  sv5 { s    , 5 };
+    SV  sv3 { s + 2, 3 };
+    SV  sv4 { s + 1, 4 };
+    SV  sv5 { s    , 5 };
     SV  svNot {"def", 3 };
 
     LIBCPP_ASSERT_NOEXCEPT(sv0.ends_with(""));
diff --git a/libcxx/test/std/strings/string.view/string.view.template/starts_with.ptr.pass.cpp b/libcxx/test/std/strings/string.view/string.view.template/starts_with.ptr.pass.cpp
--- a/libcxx/test/std/strings/string.view/string.view.template/starts_with.ptr.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string.view.template/starts_with.ptr.pass.cpp
@@ -26,9 +26,9 @@
     SV  sv0 {};
     SV  sv1 { s, 1 };
     SV  sv2 { s, 2 };
-//     SV  sv3 { s, 3 };
-//     SV  sv4 { s, 4 };
-//     SV  sv5 { s, 5 };
+    SV  sv3 { s, 3 };
+    SV  sv4 { s, 4 };
+    SV  sv5 { s, 5 };
     SV  svNot {"def", 3 };
 
     LIBCPP_ASSERT_NOEXCEPT(sv0.starts_with(""));
diff --git a/libcxx/test/std/strings/string.view/string_view.literals/literal.pass.cpp b/libcxx/test/std/strings/string.view/string_view.literals/literal.pass.cpp
--- a/libcxx/test/std/strings/string.view/string_view.literals/literal.pass.cpp
+++ b/libcxx/test/std/strings/string.view/string_view.literals/literal.pass.cpp
@@ -6,9 +6,9 @@
 //
 //===----------------------------------------------------------------------===//
 
-// UNSUPPORTED: c++03, c++11
-
 // Note: libc++ supports string_view before C++17, but literals were introduced in C++14
+// UNSUPPORTED: c++03, c++11
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
 
 #include <string_view>
 #include <cassert>
diff --git a/libcxx/test/std/strings/string.view/string_view.literals/literal.verify.cpp b/libcxx/test/std/strings/string.view/string_view.literals/literal.verify.cpp
--- a/libcxx/test/std/strings/string.view/string_view.literals/literal.verify.cpp
+++ b/libcxx/test/std/strings/string.view/string_view.literals/literal.verify.cpp
@@ -6,7 +6,9 @@
 //
 //===----------------------------------------------------------------------===//
 
+// Note: libc++ supports string_view before C++17, but literals were introduced in C++14
 // UNSUPPORTED: c++03, c++11
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
 
 #include <string_view>
 
diff --git a/libcxx/test/std/strings/string.view/traits_mismatch.compile.fail.cpp b/libcxx/test/std/strings/string.view/traits_mismatch.compile.fail.cpp
--- a/libcxx/test/std/strings/string.view/traits_mismatch.compile.fail.cpp
+++ b/libcxx/test/std/strings/string.view/traits_mismatch.compile.fail.cpp
@@ -9,6 +9,8 @@
 // <string_view>
 //   The string_views's value type must be the same as the traits's char_type
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 
 int main(int, char**)
diff --git a/libcxx/test/std/strings/string.view/trivially_copyable.compile.pass.cpp b/libcxx/test/std/strings/string.view/trivially_copyable.compile.pass.cpp
--- a/libcxx/test/std/strings/string.view/trivially_copyable.compile.pass.cpp
+++ b/libcxx/test/std/strings/string.view/trivially_copyable.compile.pass.cpp
@@ -10,6 +10,8 @@
 
 // <string_view>
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <type_traits>
 
diff --git a/libcxx/test/std/strings/string.view/types.pass.cpp b/libcxx/test/std/strings/string.view/types.pass.cpp
--- a/libcxx/test/std/strings/string.view/types.pass.cpp
+++ b/libcxx/test/std/strings/string.view/types.pass.cpp
@@ -30,6 +30,8 @@
 //
 // };
 
+// UNSUPPORTED: !stdlib=libc++ && (c++03 || c++11 || c++14)
+
 #include <string_view>
 #include <iterator>
 #include <type_traits>