diff --git a/test/std/containers/associative/map/map.cons/deduct.fail.cpp b/test/std/containers/associative/map/map.cons/deduct.fail.cpp
index d7402b5..9b228ed 100644
--- a/test/std/containers/associative/map/map.cons/deduct.fail.cpp
+++ b/test/std/containers/associative/map/map.cons/deduct.fail.cpp
@@ -9,7 +9,7 @@
 // <map>
 // UNSUPPORTED: c++98, c++03, c++11, c++14
 // UNSUPPORTED: libcpp-no-deduction-guides
-// XFAIL: clang-6
+// XFAIL: clang-6, apple-clang-9.0, apple-clang-9.1
 //  clang-6 gives different error messages.
 
 // template<class InputIterator,
diff --git a/test/std/containers/associative/multimap/multimap.cons/deduct.fail.cpp b/test/std/containers/associative/multimap/multimap.cons/deduct.fail.cpp
index fa6dd92..dcbec4c 100644
--- a/test/std/containers/associative/multimap/multimap.cons/deduct.fail.cpp
+++ b/test/std/containers/associative/multimap/multimap.cons/deduct.fail.cpp
@@ -9,7 +9,7 @@
 // <map>
 // UNSUPPORTED: c++98, c++03, c++11, c++14
 // UNSUPPORTED: libcpp-no-deduction-guides
-// XFAIL: clang-6
+// XFAIL: clang-6, apple-clang-9.0, apple-clang-9.1
 //  clang-6 gives different error messages.
 
 // template<class InputIterator,
diff --git a/test/std/utilities/meta/meta.rel/is_base_of_union.pass.cpp b/test/std/utilities/meta/meta.rel/is_base_of_union.pass.cpp
index 67cffbd..59f231f 100644
--- a/test/std/utilities/meta/meta.rel/is_base_of_union.pass.cpp
+++ b/test/std/utilities/meta/meta.rel/is_base_of_union.pass.cpp
@@ -17,7 +17,8 @@
 //	Clang before v9 and apple-clang up to and including v10 do not
 //  report that unions are never base classes - nor can they have bases.
 //  See https://reviews.llvm.org/D61858
-// XFAIL: apple-clang-6.0, apple-clang-7.0, apple-clang-8.0, apple-clang-9.0, apple-clang-10.0
+// XFAIL: apple-clang-6.0, apple-clang-7.0, apple-clang-8.0
+// XFAIL: apple-clang-9.0, apple-clang-9.1, apple-clang-10.0
 // XFAIL: clang-3.3, clang-3.4, clang-3.5, clang-3.6, clang-3.7, clang-3.8, clang-3.9
 // XFAIL: clang-4.0, clang-5.0, clang-6.0, clang-7.0, clang-8.0