diff --git a/libcxx/test/std/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_long_double_en_US.pass.cpp b/libcxx/test/std/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_long_double_en_US.pass.cpp
--- a/libcxx/test/std/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_long_double_en_US.pass.cpp
+++ b/libcxx/test/std/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_long_double_en_US.pass.cpp
@@ -14,7 +14,10 @@
 //               ios_base::iostate& err, long double& v) const;
 
 // REQUIRES: locale.en_US.UTF-8
-// XFAIL: LIBCXX-WINDOWS-FIXME
+
+// On Windows, tests for negative values are ifdeffed out, as they
+// are formatted differently in the en_US locale there, as e.g.
+// "($0.01)" instead of "-$0.01"
 
 #include <locale>
 #include <ios>
@@ -75,6 +78,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == 0);
         }
+#ifndef _WIN32
         {   // negative one
             std::string v = "-0.01";
             typedef cpp17_input_iterator<const char*> I;
@@ -86,6 +90,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == -1);
         }
+#endif
         {   // positive
             std::string v = "1,234,567.89";
             typedef cpp17_input_iterator<const char*> I;
@@ -97,6 +102,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == 123456789);
         }
+#ifndef _WIN32
         {   // negative
             std::string v = "-1,234,567.89";
             typedef cpp17_input_iterator<const char*> I;
@@ -119,6 +125,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == -123456789);
         }
+#endif
         {   // zero, showbase
             std::string v = "$0.00";
             typedef cpp17_input_iterator<const char*> I;
@@ -143,6 +150,7 @@
             assert(ex == 0);
             std::noshowbase(ios);
         }
+#ifndef _WIN32
         {   // negative one, showbase
             std::string v = "-$0.01";
             typedef cpp17_input_iterator<const char*> I;
@@ -167,6 +175,7 @@
             assert(ex == -1);
             std::noshowbase(ios);
         }
+#endif
         {   // positive, showbase
             std::string v = "$1,234,567.89";
             typedef cpp17_input_iterator<const char*> I;
@@ -191,6 +200,7 @@
             assert(ex == 123456789);
             std::noshowbase(ios);
         }
+#ifndef _WIN32
         {   // negative, showbase
             std::string v = "-$1,234,567.89";
             std::showbase(ios);
@@ -226,6 +236,7 @@
             assert(iter.base() == v.data() + 1);
             assert(err == std::ios_base::failbit);
         }
+#endif
     }
     {
         const my_facet f(1);
@@ -241,6 +252,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == 0);
         }
+#ifndef _WIN32
         {   // negative one
             std::string v = "-0.01";
             typedef cpp17_input_iterator<const char*> I;
@@ -252,6 +264,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == -1);
         }
+#endif
         {   // positive
             std::string v = "1,234,567.89";
             typedef cpp17_input_iterator<const char*> I;
@@ -263,6 +276,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == 123456789);
         }
+#ifndef _WIN32
         {   // negative
             std::string v = "-1,234,567.89";
             typedef cpp17_input_iterator<const char*> I;
@@ -285,6 +299,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == -123456789);
         }
+#endif
         {   // zero, showbase
             std::string v = "USD 0.00";
             typedef cpp17_input_iterator<const char*> I;
@@ -309,6 +324,7 @@
             assert(ex == 0);
             std::noshowbase(ios);
         }
+#ifndef _WIN32
         {   // negative one, showbase
             std::string v = "-USD 0.01";
             typedef cpp17_input_iterator<const char*> I;
@@ -333,6 +349,7 @@
             assert(ex == -1);
             std::noshowbase(ios);
         }
+#endif
         {   // positive, showbase
             std::string v = "USD 1,234,567.89";
             typedef cpp17_input_iterator<const char*> I;
@@ -357,6 +374,7 @@
             assert(ex == 123456789);
             std::noshowbase(ios);
         }
+#ifndef _WIN32
         {   // negative, showbase
             std::string v = "-USD 1,234,567.89";
             std::showbase(ios);
@@ -392,6 +410,7 @@
             assert(iter.base() == v.data() + 1);
             assert(err == std::ios_base::failbit);
         }
+#endif
     }
 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
     {
@@ -408,6 +427,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == 0);
         }
+#ifndef _WIN32
         {   // negative one
             std::wstring v = L"-0.01";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -419,6 +439,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == -1);
         }
+#endif
         {   // positive
             std::wstring v = L"1,234,567.89";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -430,6 +451,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == 123456789);
         }
+#ifndef _WIN32
         {   // negative
             std::wstring v = L"-1,234,567.89";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -452,6 +474,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == -123456789);
         }
+#endif
         {   // zero, showbase
             std::wstring v = L"$0.00";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -476,6 +499,7 @@
             assert(ex == 0);
             std::noshowbase(ios);
         }
+#ifndef _WIN32
         {   // negative one, showbase
             std::wstring v = L"-$0.01";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -500,6 +524,7 @@
             assert(ex == -1);
             std::noshowbase(ios);
         }
+#endif
         {   // positive, showbase
             std::wstring v = L"$1,234,567.89";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -524,6 +549,7 @@
             assert(ex == 123456789);
             std::noshowbase(ios);
         }
+#ifndef _WIN32
         {   // negative, showbase
             std::wstring v = L"-$1,234,567.89";
             std::showbase(ios);
@@ -559,6 +585,7 @@
             assert(iter.base() == v.data() + 1);
             assert(err == std::ios_base::failbit);
         }
+#endif
     }
     {
         const my_facetw f(1);
@@ -574,6 +601,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == 0);
         }
+#ifndef _WIN32
         {   // negative one
             std::wstring v = L"-0.01";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -585,6 +613,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == -1);
         }
+#endif
         {   // positive
             std::wstring v = L"1,234,567.89";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -596,6 +625,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == 123456789);
         }
+#ifndef _WIN32
         {   // negative
             std::wstring v = L"-1,234,567.89";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -618,6 +648,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == -123456789);
         }
+#endif
         {   // zero, showbase
             std::wstring v = L"USD 0.00";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -642,6 +673,7 @@
             assert(ex == 0);
             std::noshowbase(ios);
         }
+#ifndef _WIN32
         {   // negative one, showbase
             std::wstring v = L"-USD 0.01";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -666,6 +698,7 @@
             assert(ex == -1);
             std::noshowbase(ios);
         }
+#endif
         {   // positive, showbase
             std::wstring v = L"USD 1,234,567.89";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -690,6 +723,7 @@
             assert(ex == 123456789);
             std::noshowbase(ios);
         }
+#ifndef _WIN32
         {   // negative, showbase
             std::wstring v = L"-USD 1,234,567.89";
             std::showbase(ios);
@@ -725,6 +759,7 @@
             assert(iter.base() == v.data() + 1);
             assert(err == std::ios_base::failbit);
         }
+#endif
     }
 #endif // TEST_HAS_NO_WIDE_CHARACTERS
     {
diff --git a/libcxx/test/std/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_string_en_US.pass.cpp b/libcxx/test/std/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_string_en_US.pass.cpp
--- a/libcxx/test/std/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_string_en_US.pass.cpp
+++ b/libcxx/test/std/localization/locale.categories/category.monetary/locale.money.get/locale.money.get.members/get_string_en_US.pass.cpp
@@ -14,7 +14,10 @@
 //               ios_base::iostate& err, string_type& v) const;
 
 // REQUIRES: locale.en_US.UTF-8
-// XFAIL: LIBCXX-WINDOWS-FIXME
+
+// On Windows, tests for negative values are ifdeffed out, as they
+// are formatted differently in the en_US locale there, as e.g.
+// "($0.01)" instead of "-$0.01"
 
 #include <locale>
 #include <ios>
@@ -75,6 +78,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == "0");
         }
+#ifndef _WIN32
         {   // negative one
             std::string v = "-0.01";
             typedef cpp17_input_iterator<const char*> I;
@@ -86,6 +90,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == "-1");
         }
+#endif
         {   // positive
             std::string v = "1,234,567.89";
             typedef cpp17_input_iterator<const char*> I;
@@ -97,6 +102,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == "123456789");
         }
+#ifndef _WIN32
         {   // negative
             std::string v = "-1,234,567.89";
             typedef cpp17_input_iterator<const char*> I;
@@ -119,6 +125,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == "-123456789");
         }
+#endif
         {   // zero, showbase
             std::string v = "$0.00";
             typedef cpp17_input_iterator<const char*> I;
@@ -143,6 +150,7 @@
             assert(ex == "0");
             std::noshowbase(ios);
         }
+#ifndef _WIN32
         {   // negative one, showbase
             std::string v = "-$0.01";
             typedef cpp17_input_iterator<const char*> I;
@@ -167,6 +175,7 @@
             assert(ex == "-1");
             std::noshowbase(ios);
         }
+#endif
         {   // positive, showbase
             std::string v = "$1,234,567.89";
             typedef cpp17_input_iterator<const char*> I;
@@ -191,6 +200,7 @@
             assert(ex == "123456789");
             std::noshowbase(ios);
         }
+#ifndef _WIN32
         {   // negative, showbase
             std::string v = "-$1,234,567.89";
             std::showbase(ios);
@@ -228,6 +238,7 @@
             assert(err == std::ios_base::failbit);
             assert(ex == "");
         }
+#endif
     }
     {
         const my_facet f(1);
@@ -243,6 +254,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == "0");
         }
+#ifndef _WIN32
         {   // negative one
             std::string v = "-0.01";
             typedef cpp17_input_iterator<const char*> I;
@@ -254,6 +266,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == "-1");
         }
+#endif
         {   // positive
             std::string v = "1,234,567.89";
             typedef cpp17_input_iterator<const char*> I;
@@ -265,6 +278,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == "123456789");
         }
+#ifndef _WIN32
         {   // negative
             std::string v = "-1,234,567.89";
             typedef cpp17_input_iterator<const char*> I;
@@ -287,6 +301,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == "-123456789");
         }
+#endif
         {   // zero, showbase
             std::string v = "USD 0.00";
             typedef cpp17_input_iterator<const char*> I;
@@ -311,6 +326,7 @@
             assert(ex == "0");
             std::noshowbase(ios);
         }
+#ifndef _WIN32
         {   // negative one, showbase
             std::string v = "-USD 0.01";
             typedef cpp17_input_iterator<const char*> I;
@@ -335,6 +351,7 @@
             assert(ex == "-1");
             std::noshowbase(ios);
         }
+#endif
         {   // positive, showbase
             std::string v = "USD 1,234,567.89";
             typedef cpp17_input_iterator<const char*> I;
@@ -359,6 +376,7 @@
             assert(ex == "123456789");
             std::noshowbase(ios);
         }
+#ifndef _WIN32
         {   // negative, showbase
             std::string v = "-USD 1,234,567.89";
             std::showbase(ios);
@@ -396,6 +414,7 @@
             assert(err == std::ios_base::failbit);
             assert(ex == "");
         }
+#endif
     }
 #ifndef TEST_HAS_NO_WIDE_CHARACTERS
     {
@@ -412,6 +431,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == L"0");
         }
+#ifndef _WIN32
         {   // negative one
             std::wstring v = L"-0.01";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -423,6 +443,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == L"-1");
         }
+#endif
         {   // positive
             std::wstring v = L"1,234,567.89";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -434,6 +455,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == L"123456789");
         }
+#ifndef _WIN32
         {   // negative
             std::wstring v = L"-1,234,567.89";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -456,6 +478,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == L"-123456789");
         }
+#endif
         {   // zero, showbase
             std::wstring v = L"$0.00";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -480,6 +503,7 @@
             assert(ex == L"0");
             std::noshowbase(ios);
         }
+#ifndef _WIN32
         {   // negative one, showbase
             std::wstring v = L"-$0.01";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -504,6 +528,7 @@
             assert(ex == L"-1");
             std::noshowbase(ios);
         }
+#endif
         {   // positive, showbase
             std::wstring v = L"$1,234,567.89";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -528,6 +553,7 @@
             assert(ex == L"123456789");
             std::noshowbase(ios);
         }
+#ifndef _WIN32
         {   // negative, showbase
             std::wstring v = L"-$1,234,567.89";
             std::showbase(ios);
@@ -565,6 +591,7 @@
             assert(err == std::ios_base::failbit);
             assert(ex == L"");
         }
+#endif
     }
     {
         const my_facetw f(1);
@@ -580,6 +607,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == L"0");
         }
+#ifndef _WIN32
         {   // negative one
             std::wstring v = L"-0.01";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -591,6 +619,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == L"-1");
         }
+#endif
         {   // positive
             std::wstring v = L"1,234,567.89";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -602,6 +631,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == L"123456789");
         }
+#ifndef _WIN32
         {   // negative
             std::wstring v = L"-1,234,567.89";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -624,6 +654,7 @@
             assert(err == std::ios_base::eofbit);
             assert(ex == L"-123456789");
         }
+#endif
         {   // zero, showbase
             std::wstring v = L"USD 0.00";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -648,6 +679,7 @@
             assert(ex == L"0");
             std::noshowbase(ios);
         }
+#ifndef _WIN32
         {   // negative one, showbase
             std::wstring v = L"-USD 0.01";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -672,6 +704,7 @@
             assert(ex == L"-1");
             std::noshowbase(ios);
         }
+#endif
         {   // positive, showbase
             std::wstring v = L"USD 1,234,567.89";
             typedef cpp17_input_iterator<const wchar_t*> I;
@@ -696,6 +729,7 @@
             assert(ex == L"123456789");
             std::noshowbase(ios);
         }
+#ifndef _WIN32
         {   // negative, showbase
             std::wstring v = L"-USD 1,234,567.89";
             std::showbase(ios);
@@ -733,6 +767,7 @@
             assert(err == std::ios_base::failbit);
             assert(ex == L"");
         }
+#endif
     }
 #endif // TEST_HAS_NO_WIDE_CHARACTERS
     {