diff --git a/libcxx/test/std/atomics/atomics.types.operations/atomics.types.operations.req/atomic_is_lock_free.pass.cpp b/libcxx/test/std/atomics/atomics.types.operations/atomics.types.operations.req/atomic_is_lock_free.pass.cpp
--- a/libcxx/test/std/atomics/atomics.types.operations/atomics.types.operations.req/atomic_is_lock_free.pass.cpp
+++ b/libcxx/test/std/atomics/atomics.types.operations/atomics.types.operations.req/atomic_is_lock_free.pass.cpp
@@ -27,10 +27,11 @@
 struct TestFn {
   void operator()() const {
     typedef std::atomic<T> A;
-    A t = T();
-    bool b1 = std::atomic_is_lock_free(static_cast<const A*>(&t));
-    volatile A vt = T();
-    bool b2 = std::atomic_is_lock_free(static_cast<const volatile A*>(&vt));
+    T t = T();
+    A a(t);
+    bool b1 = std::atomic_is_lock_free(static_cast<const A*>(&a));
+    volatile A va(t);
+    bool b2 = std::atomic_is_lock_free(static_cast<const volatile A*>(&va));
     assert(b1 == b2);
   }
 };
diff --git a/libcxx/test/std/depr/depr.auto.ptr/auto.ptr/A.h b/libcxx/test/std/depr/depr.auto.ptr/auto.ptr/A.h
--- a/libcxx/test/std/depr/depr.auto.ptr/auto.ptr/A.h
+++ b/libcxx/test/std/depr/depr.auto.ptr/auto.ptr/A.h
@@ -19,6 +19,8 @@
     A(const A& a) : id_(a.id_) {++count;}
     ~A() {assert(id_ >= 0); id_ = -1; --count;}
 
+    A& operator=(const A& other) { id_ = other.id_; return *this; }
+
     int id() const {return id_;}
 
     static int count;
diff --git a/libcxx/test/std/depr/depr.auto.ptr/auto.ptr/AB.h b/libcxx/test/std/depr/depr.auto.ptr/auto.ptr/AB.h
--- a/libcxx/test/std/depr/depr.auto.ptr/auto.ptr/AB.h
+++ b/libcxx/test/std/depr/depr.auto.ptr/auto.ptr/AB.h
@@ -19,6 +19,8 @@
     A(const A& a) : id_(a.id_) {++count;}
     virtual ~A() {assert(id_ >= 0); id_ = -1; --count;}
 
+    A& operator=(const A& other) { id_ = other.id_; return *this; }
+
     static int count;
 };
 
diff --git a/libcxx/test/std/input.output/file.streams/c.files/cstdio.pass.cpp b/libcxx/test/std/input.output/file.streams/c.files/cstdio.pass.cpp
--- a/libcxx/test/std/input.output/file.streams/c.files/cstdio.pass.cpp
+++ b/libcxx/test/std/input.output/file.streams/c.files/cstdio.pass.cpp
@@ -148,7 +148,10 @@
 #ifndef _LIBCPP_HAS_NO_STDIN
     static_assert((std::is_same<decltype(std::getchar()), int>::value), "");
 #if TEST_STD_VER <= 11
+#   pragma GCC diagnostic push
+#   pragma GCC diagnostic ignored "-Wdeprecated-declarations" // disable the warning from the C library
     static_assert((std::is_same<decltype(std::gets(cp)), char*>::value), "");
+#   pragma GCC diagnostic pop
 #endif
     static_assert((std::is_same<decltype(std::scanf(" ")), int>::value), "");
     static_assert((std::is_same<decltype(std::vscanf(" ",va)), int>::value), "");
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
@@ -6,8 +6,8 @@
 //
 //===----------------------------------------------------------------------===//
 
-// XFAIL: gcc-10, gcc-11
-//     GCC's __builtin_strlen isn't constexpr yet
+// GCC's __builtin_strlen isn't constexpr yet
+// XFAIL: (gcc-10 || gcc-11) && !(c++11 || c++14 || c++17)
 // UNSUPPORTED: LIBCXX-DEBUG-FIXME
 
 // <string_view>
diff --git a/libcxx/test/std/utilities/smartptr/unique.ptr/unique.ptr.class/unique.ptr.ctor/auto_pointer.pass.cpp b/libcxx/test/std/utilities/smartptr/unique.ptr/unique.ptr.class/unique.ptr.ctor/auto_pointer.pass.cpp
--- a/libcxx/test/std/utilities/smartptr/unique.ptr/unique.ptr.class/unique.ptr.ctor/auto_pointer.pass.cpp
+++ b/libcxx/test/std/utilities/smartptr/unique.ptr/unique.ptr.class/unique.ptr.ctor/auto_pointer.pass.cpp
@@ -36,7 +36,7 @@
 struct B : public A {
   static int count;
   B() { ++count; }
-  B(const B&) { ++count; }
+  B(const B& b) : A(b) { ++count; }
   virtual ~B() { --count; }
 };
 
diff --git a/libcxx/test/support/test_macros.h b/libcxx/test/support/test_macros.h
--- a/libcxx/test/support/test_macros.h
+++ b/libcxx/test/support/test_macros.h
@@ -139,7 +139,7 @@
 # define TEST_NOEXCEPT_COND(...)
 #endif
 
-#if TEST_STD_VER >= 17
+#if TEST_STD_VER >= 11
 # define TEST_THROW_SPEC(...)
 #else
 # define TEST_THROW_SPEC(...) throw(__VA_ARGS__)
diff --git a/libcxx/utils/ci/buildkite-pipeline.yml b/libcxx/utils/ci/buildkite-pipeline.yml
--- a/libcxx/utils/ci/buildkite-pipeline.yml
+++ b/libcxx/utils/ci/buildkite-pipeline.yml
@@ -132,7 +132,7 @@
         - exit_status: -1  # Agent was lost
           limit: 2
 
-  - label: "GCC 11"
+  - label: "GCC 11 / C++latest"
     command: "libcxx/utils/ci/run-buildbot generic-gcc"
     artifact_paths:
       - "**/test-results.xml"
@@ -149,6 +149,18 @@
   #
   - wait
 
+  - label: "GCC 11 / C++11"
+    command: "libcxx/utils/ci/run-buildbot generic-gcc-cxx11"
+    artifact_paths:
+      - "**/test-results.xml"
+    agents:
+      queue: "libcxx-builders"
+      os: "linux"
+    retry:
+      automatic:
+        - exit_status: -1  # Agent was lost
+          limit: 2
+
   - label: "Clang 11"
     command: "libcxx/utils/ci/run-buildbot generic-clang-11"
     artifact_paths:
diff --git a/libcxx/utils/ci/run-buildbot b/libcxx/utils/ci/run-buildbot
--- a/libcxx/utils/ci/run-buildbot
+++ b/libcxx/utils/ci/run-buildbot
@@ -278,6 +278,13 @@
     generate-cmake
     check-cxx-cxxabi
 ;;
+generic-gcc-cxx11)
+    export CC=gcc-11
+    export CXX=g++-11
+    clean
+    generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-cxx11.cmake"
+    check-cxx-cxxabi
+;;
 generic-asan)
     clean
     generate-cmake -C "${MONOREPO_ROOT}/libcxx/cmake/caches/Generic-asan.cmake"
diff --git a/libcxx/utils/libcxx/test/features.py b/libcxx/utils/libcxx/test/features.py
--- a/libcxx/utils/libcxx/test/features.py
+++ b/libcxx/utils/libcxx/test/features.py
@@ -42,6 +42,7 @@
   Feature(name='has-fobjc-arc',                 when=lambda cfg: hasCompileFlag(cfg, '-xobjective-c++ -fobjc-arc') and
                                                                  sys.platform.lower().strip() == 'darwin'), # TODO: this doesn't handle cross-compiling to Apple platforms.
   Feature(name='objective-c++',                 when=lambda cfg: hasCompileFlag(cfg, '-xobjective-c++ -fobjc-arc')),
+  Feature(name='no-noexcept-function-type',     when=lambda cfg: featureTestMacros(cfg).get('__cpp_noexcept_function_type', 0) < 201510),
 
   Feature(name='non-lockfree-atomics',
           when=lambda cfg: sourceBuilds(cfg, """
diff --git a/libcxxabi/test/catch_function_03.pass.cpp b/libcxxabi/test/catch_function_03.pass.cpp
--- a/libcxxabi/test/catch_function_03.pass.cpp
+++ b/libcxxabi/test/catch_function_03.pass.cpp
@@ -7,7 +7,7 @@
 //===----------------------------------------------------------------------===//
 
 // Can a noexcept function pointer be caught by a non-noexcept catch clause?
-// UNSUPPORTED: no-exceptions, libcxxabi-no-noexcept-function-type
+// UNSUPPORTED: no-exceptions, no-noexcept-function-type
 
 #include <cassert>
 
diff --git a/libcxxabi/test/catch_member_function_pointer_02.pass.cpp b/libcxxabi/test/catch_member_function_pointer_02.pass.cpp
--- a/libcxxabi/test/catch_member_function_pointer_02.pass.cpp
+++ b/libcxxabi/test/catch_member_function_pointer_02.pass.cpp
@@ -8,7 +8,7 @@
 
 // Can a noexcept member function pointer be caught by a non-noexcept catch
 // clause?
-// UNSUPPORTED: no-exceptions, libcxxabi-no-noexcept-function-type
+// UNSUPPORTED: no-exceptions, no-noexcept-function-type
 
 // GCC 7 and 8 support noexcept function types but this test still fails.
 // This is likely a bug in their implementation. Investigation needed.
diff --git a/libcxxabi/test/libcxxabi/test/config.py b/libcxxabi/test/libcxxabi/test/config.py
--- a/libcxxabi/test/libcxxabi/test/config.py
+++ b/libcxxabi/test/libcxxabi/test/config.py
@@ -37,13 +37,8 @@
         self.libcxxabi_obj_root = self.get_lit_conf('libcxxabi_obj_root')
         super(Configuration, self).configure_obj_root()
 
-    def has_cpp_feature(self, feature, required_value):
-        return intMacroValue(self.cxx.dumpMacros().get('__cpp_' + feature, '0')) >= required_value
-
     def configure_features(self):
         super(Configuration, self).configure_features()
-        if not self.has_cpp_feature('noexcept_function_type', 201510):
-            self.config.available_features.add('libcxxabi-no-noexcept-function-type')
         if not self.get_lit_bool('llvm_unwinder', False):
             self.config.available_features.add('libcxxabi-has-system-unwinder')
 
diff --git a/libcxxabi/test/unwind_02.pass.cpp b/libcxxabi/test/unwind_02.pass.cpp
--- a/libcxxabi/test/unwind_02.pass.cpp
+++ b/libcxxabi/test/unwind_02.pass.cpp
@@ -13,6 +13,7 @@
 
 #if defined(__GNUC__)
 #pragma GCC diagnostic ignored "-Wunreachable-code"
+#pragma GCC diagnostic ignored "-Wdeprecated" // dynamic exception specifications are deprecated
 #endif
 
 struct A
diff --git a/libcxxabi/test/unwind_03.pass.cpp b/libcxxabi/test/unwind_03.pass.cpp
--- a/libcxxabi/test/unwind_03.pass.cpp
+++ b/libcxxabi/test/unwind_03.pass.cpp
@@ -15,6 +15,7 @@
 
 #if defined(__GNUC__)
 #pragma GCC diagnostic ignored "-Wunreachable-code"
+#pragma GCC diagnostic ignored "-Wdeprecated" // dynamic exception specifications are deprecated
 #endif
 
 struct A
diff --git a/libcxxabi/test/unwind_04.pass.cpp b/libcxxabi/test/unwind_04.pass.cpp
--- a/libcxxabi/test/unwind_04.pass.cpp
+++ b/libcxxabi/test/unwind_04.pass.cpp
@@ -15,6 +15,7 @@
 
 #if defined(__GNUC__)
 #pragma GCC diagnostic ignored "-Wunreachable-code"
+#pragma GCC diagnostic ignored "-Wdeprecated" // dynamic exception specifications are deprecated
 #endif
 
 struct A
diff --git a/libcxxabi/test/unwind_05.pass.cpp b/libcxxabi/test/unwind_05.pass.cpp
--- a/libcxxabi/test/unwind_05.pass.cpp
+++ b/libcxxabi/test/unwind_05.pass.cpp
@@ -15,6 +15,7 @@
 
 #if defined(__GNUC__)
 #pragma GCC diagnostic ignored "-Wunreachable-code"
+#pragma GCC diagnostic ignored "-Wdeprecated" // dynamic exception specifications are deprecated
 #endif
 
 struct A