diff --git a/test/libcxx/language.support/cxa_deleted_virtual.pass.cpp b/test/libcxx/language.support/cxa_deleted_virtual.pass.cpp
index ddef5d00e..7e3130cf9 100644
--- a/test/libcxx/language.support/cxa_deleted_virtual.pass.cpp
+++ b/test/libcxx/language.support/cxa_deleted_virtual.pass.cpp
@@ -12,6 +12,7 @@
 // Test exporting the symbol: "__cxa_deleted_virtual" in macosx
 // But don't expect the symbol to be exported in previous versions.
 //
+// XFAIL: with_system_cxx_lib=macosx10.14
 // XFAIL: with_system_cxx_lib=macosx10.13
 // XFAIL: with_system_cxx_lib=macosx10.12
 // XFAIL: with_system_cxx_lib=macosx10.11
diff --git a/test/std/utilities/charconv/charconv.from.chars/integral.pass.cpp b/test/std/utilities/charconv/charconv.from.chars/integral.pass.cpp
index b6a940f80..4dec67e87 100644
--- a/test/std/utilities/charconv/charconv.from.chars/integral.pass.cpp
+++ b/test/std/utilities/charconv/charconv.from.chars/integral.pass.cpp
@@ -9,6 +9,7 @@
 
 // UNSUPPORTED: c++98, c++03, c++11
 
+// XFAIL: with_system_cxx_lib=macosx10.14
 // XFAIL: with_system_cxx_lib=macosx10.13
 // XFAIL: with_system_cxx_lib=macosx10.12
 // XFAIL: with_system_cxx_lib=macosx10.11
diff --git a/test/std/utilities/charconv/charconv.to.chars/integral.pass.cpp b/test/std/utilities/charconv/charconv.to.chars/integral.pass.cpp
index ab78ca464..ddf614e33 100644
--- a/test/std/utilities/charconv/charconv.to.chars/integral.pass.cpp
+++ b/test/std/utilities/charconv/charconv.to.chars/integral.pass.cpp
@@ -9,6 +9,7 @@
 
 // UNSUPPORTED: c++98, c++03, c++11
 
+// XFAIL: with_system_cxx_lib=macosx10.14
 // XFAIL: with_system_cxx_lib=macosx10.13
 // XFAIL: with_system_cxx_lib=macosx10.12
 // XFAIL: with_system_cxx_lib=macosx10.11