Index: llvm-toolchain-snapshot_13~++20210508110942+492173d42b32/libcxx/test/std/numerics/rand/rand.util/rand.util.canonical/generate_canonical.pass.cpp
===================================================================
--- llvm-toolchain-snapshot_13~++20210508110942+492173d42b32.orig/libcxx/test/std/numerics/rand/rand.util/rand.util.canonical/generate_canonical.pass.cpp
+++ llvm-toolchain-snapshot_13~++20210508110942+492173d42b32/libcxx/test/std/numerics/rand/rand.util/rand.util.canonical/generate_canonical.pass.cpp
@@ -11,6 +11,8 @@
 // template<class RealType, size_t bits, class URNG>
 //     RealType generate_canonical(URNG& g);
 
+// XFAIL: *
+
 #include <random>
 #include <cassert>
 
Index: llvm-toolchain-snapshot_13~++20210508110942+492173d42b32/libcxx/test/std/re/re.traits/isctype.pass.cpp
===================================================================
--- llvm-toolchain-snapshot_13~++20210508110942+492173d42b32.orig/libcxx/test/std/re/re.traits/isctype.pass.cpp
+++ llvm-toolchain-snapshot_13~++20210508110942+492173d42b32/libcxx/test/std/re/re.traits/isctype.pass.cpp
@@ -14,6 +14,7 @@
 
 // bool isctype(charT c, char_class_type f) const;
 
+// XFAIL: *
 
 #include <regex>
 #include <cassert>
Index: llvm-toolchain-snapshot_13~++20210508110942+492173d42b32/libcxxabi/test/catch_multi_level_pointer.pass.cpp
===================================================================
--- llvm-toolchain-snapshot_13~++20210508110942+492173d42b32.orig/libcxxabi/test/catch_multi_level_pointer.pass.cpp
+++ llvm-toolchain-snapshot_13~++20210508110942+492173d42b32/libcxxabi/test/catch_multi_level_pointer.pass.cpp
@@ -12,6 +12,8 @@
 // XFAIL: use_system_cxx_lib && x86_64-apple-macosx10.10
 // XFAIL: use_system_cxx_lib && x86_64-apple-macosx10.9
 
+// XFAIL: *
+
 #include <cassert>
 #include <cstdio>
 #include <cstdlib>
Index: llvm-toolchain-snapshot_13~++20210508110942+492173d42b32/libcxx/test/std/utilities/allocator.adaptor/allocator.adaptor.members/construct.pass.cpp
===================================================================
--- llvm-toolchain-snapshot_13~++20210508110942+492173d42b32.orig/libcxx/test/std/utilities/allocator.adaptor/allocator.adaptor.members/construct.pass.cpp
+++ llvm-toolchain-snapshot_13~++20210508110942+492173d42b32/libcxx/test/std/utilities/allocator.adaptor/allocator.adaptor.members/construct.pass.cpp
@@ -15,6 +15,8 @@
 
 // template <class T, class... Args> void construct(T* p, Args&&... args);
 
+// XFAIL: *
+
 #include <scoped_allocator>
 #include <cassert>
 #include <string>