diff --git a/libcxx/test/std/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_long_double_ru_RU.pass.cpp b/libcxx/test/std/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_long_double_ru_RU.pass.cpp
index f9b52aa89b09..2f734284a905 100644
--- a/libcxx/test/std/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_long_double_ru_RU.pass.cpp
+++ b/libcxx/test/std/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_long_double_ru_RU.pass.cpp
@@ -33,6 +33,19 @@
 
 #include "platform_support.h" // locale name macros
 
+// TODO:
+// Some of the assertions in this test are failing on Apple platforms.
+// Until we figure out the problem and fix it, disable these tests on
+// Apple platforms. Note that we're not using XFAIL or UNSUPPORTED markup
+// here, because this test would otherwise be disabled on all platforms
+// we test. To avoid this test becoming entirely stale, we just disable
+// the parts that fail.
+//
+// See https://llvm.org/PR45739 for the bug tracking this.
+#if defined(__APPLE__)
+#   define APPLE_FIXME
+#endif
+
 typedef std::money_get<char, input_iterator<const char*> > Fn;
 
 class my_facet
@@ -301,6 +314,7 @@ int main(int, char**)
             assert(err == std::ios_base::goodbit);
             assert(ex == 0);
         }
+#if !defined(APPLE_FIXME)
         {   // zero, showbase
             std::string v = "0,00 RUB ";
             showbase(ios);
@@ -314,6 +328,7 @@ int main(int, char**)
             assert(ex == 0);
             noshowbase(ios);
         }
+#endif
         {   // negative one, showbase
             std::string v = "-0,01 RUB ";
             typedef input_iterator<const char*> I;
@@ -325,6 +340,7 @@ int main(int, char**)
             assert(err == std::ios_base::goodbit);
             assert(ex == -1);
         }
+#if !defined(APPLE_FIXME)
         {   // negative one, showbase
             std::string v = "-0,01 RUB ";
             showbase(ios);
@@ -338,6 +354,7 @@ int main(int, char**)
             assert(ex == -1);
             noshowbase(ios);
         }
+#endif
         {   // positive, showbase
             std::string v = "1 234 567,89 RUB ";
             typedef input_iterator<const char*> I;
@@ -349,6 +366,7 @@ int main(int, char**)
             assert(err == std::ios_base::goodbit);
             assert(ex == 123456789);
         }
+#if !defined(APPLE_FIXME)
         {   // positive, showbase
             std::string v = "1 234 567,89 RUB ";
             showbase(ios);
@@ -362,6 +380,8 @@ int main(int, char**)
             assert(ex == 123456789);
             noshowbase(ios);
         }
+#endif
+#if !defined(APPLE_FIXME)
         {   // negative, showbase
             std::string v = "-1 234 567,89 RUB ";
             showbase(ios);
@@ -375,6 +395,7 @@ int main(int, char**)
             assert(ex == -123456789);
             noshowbase(ios);
         }
+#endif
         {   // negative, showbase
             std::string v = "-1 234 567,89 \xD1\x80\xD1\x83\xD0\xB1"".";
             showbase(ios);
@@ -635,6 +656,7 @@ int main(int, char**)
             assert(err == std::ios_base::goodbit);
             assert(ex == 0);
         }
+#if !defined(APPLE_FIXME)
         {   // zero, showbase
             std::wstring v = L"0,00 RUB ";
             showbase(ios);
@@ -648,6 +670,7 @@ int main(int, char**)
             assert(ex == 0);
             noshowbase(ios);
         }
+#endif
         {   // negative one, showbase
             std::wstring v = L"-0,01 RUB ";
             typedef input_iterator<const wchar_t*> I;
@@ -659,6 +682,7 @@ int main(int, char**)
             assert(err == std::ios_base::goodbit);
             assert(ex == -1);
         }
+#if !defined(APPLE_FIXME)
         {   // negative one, showbase
             std::wstring v = L"-0,01 RUB ";
             showbase(ios);
@@ -672,6 +696,7 @@ int main(int, char**)
             assert(ex == -1);
             noshowbase(ios);
         }
+#endif
         {   // positive, showbase
             std::wstring v = L"1 234 567,89 RUB ";
             typedef input_iterator<const wchar_t*> I;
@@ -683,6 +708,7 @@ int main(int, char**)
             assert(err == std::ios_base::goodbit);
             assert(ex == 123456789);
         }
+#if !defined(APPLE_FIXME)
         {   // positive, showbase
             std::wstring v = L"1 234 567,89 RUB ";
             showbase(ios);
@@ -696,6 +722,8 @@ int main(int, char**)
             assert(ex == 123456789);
             noshowbase(ios);
         }
+#endif
+#if !defined(APPLE_FIXME)
         {   // negative, showbase
             std::wstring v = L"-1 234 567,89 RUB ";
             showbase(ios);
@@ -709,6 +737,7 @@ int main(int, char**)
             assert(ex == -123456789);
             noshowbase(ios);
         }
+#endif
         {   // negative, showbase
             std::wstring v = L"-1 234 567,89 \x440\x443\x431"".";
             showbase(ios);
diff --git a/libcxx/test/std/localization/locale.categories/category.monetary/locale.money.put/locale.money.put.members/put_long_double_ru_RU.pass.cpp b/libcxx/test/std/localization/locale.categories/category.monetary/locale.money.put/locale.money.put.members/put_long_double_ru_RU.pass.cpp
index c2b5840c849b..2b82d61139c8 100644
--- a/libcxx/test/std/localization/locale.categories/category.monetary/locale.money.put/locale.money.put.members/put_long_double_ru_RU.pass.cpp
+++ b/libcxx/test/std/localization/locale.categories/category.monetary/locale.money.put/locale.money.put.members/put_long_double_ru_RU.pass.cpp
@@ -33,6 +33,19 @@
 
 #include "platform_support.h" // locale name macros
 
+// TODO:
+// Some of the assertions in this test are failing on Apple platforms.
+// Until we figure out the problem and fix it, disable these tests on
+// Apple platforms. Note that we're not using XFAIL or UNSUPPORTED markup
+// here, because this test would otherwise be disabled on all platforms
+// we test. To avoid this test becoming entirely stale, we just disable
+// the parts that fail.
+//
+// See https://llvm.org/PR45739 for the bug tracking this.
+#if defined(__APPLE__)
+#   define APPLE_FIXME
+#endif
+
 typedef std::money_put<char, output_iterator<char*> > Fn;
 
 class my_facet
@@ -68,6 +81,7 @@ int main(int, char**)
 {
     const my_facet f(1);
     // char, national
+#if !defined(APPLE_FIXME)
     {   // zero
         long double v = 0;
         char str[100];
@@ -100,6 +114,7 @@ int main(int, char**)
         std::string ex(str, iter.base());
         assert(ex == "-1 234 567,89 ");
     }
+#endif
     {   // zero, showbase
         long double v = 0;
         showbase(ios);
@@ -176,6 +191,7 @@ int main(int, char**)
     // char, international
     noshowbase(ios);
     ios.unsetf(std::ios_base::adjustfield);
+#if !defined(APPLE_FIXME)
     {   // zero
         long double v = 0;
         char str[100];
@@ -244,6 +260,7 @@ int main(int, char**)
         std::string ex(str, iter.base());
         assert(ex == "-1 234 567,89 RUB ");
     }
+#endif
     {   // negative, showbase, left
         long double v = -123456789;
         showbase(ios);
@@ -256,6 +273,7 @@ int main(int, char**)
         assert(ex == "-1 234 567,89 RUB   ");
         assert(ios.width() == 0);
     }
+#if !defined(APPLE_FIXME)
     {   // negative, showbase, internal
         long double v = -123456789;
         showbase(ios);
@@ -280,12 +298,14 @@ int main(int, char**)
         assert(ex == "  -1 234 567,89 RUB ");
         assert(ios.width() == 0);
     }
+#endif
 }
 {
     const my_facetw f(1);
     // wchar_t, national
     noshowbase(ios);
     ios.unsetf(std::ios_base::adjustfield);
+#if !defined(APPLE_FIXME)
     {   // zero
         long double v = 0;
         wchar_t str[100];
@@ -318,6 +338,7 @@ int main(int, char**)
         std::wstring ex(str, iter.base());
         assert(ex == L"-1 234 567,89 ");
     }
+#endif
     {   // zero, showbase
         long double v = 0;
         showbase(ios);
@@ -394,6 +415,7 @@ int main(int, char**)
     // wchar_t, international
     noshowbase(ios);
     ios.unsetf(std::ios_base::adjustfield);
+#if !defined(APPLE_FIXME)
     {   // zero
         long double v = 0;
         wchar_t str[100];
@@ -462,6 +484,7 @@ int main(int, char**)
         std::wstring ex(str, iter.base());
         assert(ex == L"-1 234 567,89 RUB ");
     }
+#endif
     {   // negative, showbase, left
         long double v = -123456789;
         showbase(ios);
@@ -474,6 +497,7 @@ int main(int, char**)
         assert(ex == L"-1 234 567,89 RUB   ");
         assert(ios.width() == 0);
     }
+#if !defined(APPLE_FIXME)
     {   // negative, showbase, internal
         long double v = -123456789;
         showbase(ios);
@@ -498,6 +522,7 @@ int main(int, char**)
         assert(ex == L"  -1 234 567,89 RUB ");
         assert(ios.width() == 0);
     }
+#endif
 }
 
   return 0;