Index: libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/file_size.pass.cpp
===================================================================
--- libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/file_size.pass.cpp
+++ libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/file_size.pass.cpp
@@ -83,7 +83,9 @@
     std::errc expected_err;
   } TestCases[] = {
       {env.create_dir("dir"), std::errc::is_a_directory},
+#ifndef _WIN32
       {env.create_fifo("fifo"), std::errc::not_supported},
+#endif
       {env.create_symlink("dir", "sym"), std::errc::is_a_directory}};
 
   for (auto const& TC : TestCases) {
Index: libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/file_type_obs.pass.cpp
===================================================================
--- libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/file_type_obs.pass.cpp
+++ libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/file_type_obs.pass.cpp
@@ -65,9 +65,15 @@
   scoped_test_env env;
   path f = env.create_file("foo", 42);
   path d = env.create_dir("dir");
+#ifndef _WIN32
   path fifo = env.create_fifo("fifo");
+#endif
   path hl = env.create_hardlink("foo", "hl");
-  for (auto p : {hl, f, d, fifo}) {
+  for (auto p : {hl, f, d,
+#ifndef _WIN32
+    fifo
+#endif
+  }) {
     directory_entry e(p);
     file_status st = status(p);
     file_status sym_st = symlink_status(p);
@@ -95,9 +101,15 @@
   scoped_test_env env;
   path f = env.create_file("foo", 42);
   path d = env.create_dir("dir");
+#ifndef _WIN32
   path fifo = env.create_fifo("fifo");
+#endif
   path hl = env.create_hardlink("foo", "hl");
-  for (auto p : {hl, f, d, fifo}) {
+  for (auto p : {hl, f, d,
+#ifndef _WIN32
+    fifo
+#endif
+  }) {
     directory_entry e(p);
     std::error_code status_ec = GetTestEC();
     std::error_code sym_status_ec = GetTestEC(1);
Index: libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/hard_link_count.pass.cpp
===================================================================
--- libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/hard_link_count.pass.cpp
+++ libcxx/test/std/input.output/filesystems/class.directory_entry/directory_entry.obs/hard_link_count.pass.cpp
@@ -84,12 +84,20 @@
   scoped_test_env env;
   const path dir = env.create_dir("dir");
   const path dir2 = env.create_dir("dir/dir2");
+#ifndef _WIN32
   const path fifo = env.create_fifo("dir/fifo");
   const path sym_to_fifo = env.create_symlink("dir/fifo", "dir/sym");
+#endif
 
   const perms old_perms = status(dir).permissions();
 
-  for (auto p : {dir2, fifo, sym_to_fifo}) {
+  for (auto p : {
+    dir2,
+#ifndef _WIN32
+    fifo,
+    sym_to_fifo
+#endif
+  }) {
     permissions(dir, old_perms);
     std::error_code dummy_ec = GetTestEC();
     directory_entry ent(p, dummy_ec);
Index: libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.copy/copy.pass.cpp
===================================================================
--- libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.copy/copy.pass.cpp
+++ libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.copy/copy.pass.cpp
@@ -67,8 +67,10 @@
     scoped_test_env env;
     const path file = env.create_file("file1", 42);
     const path dir = env.create_dir("dir");
+#ifndef _WIN32
     const path fifo = env.create_fifo("fifo");
     TEST_REQUIRE(is_other(fifo));
+#endif
 
     const auto test_ec = GetTestEC();
 
@@ -96,6 +98,7 @@
         TEST_REQUIRE(ec != test_ec);
         TEST_CHECK(checkThrow(dir, file, ec));
     }
+#ifndef _WIN32
     { // is_other(from)
         std::error_code ec = test_ec;
         fs::copy(fifo, dir, ec);
@@ -110,6 +113,7 @@
         TEST_REQUIRE(ec != test_ec);
         TEST_CHECK(checkThrow(file, fifo, ec));
     }
+#endif
 }
 
 TEST_CASE(from_is_symlink)
Index: libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.copy_file/copy_file.pass.cpp
===================================================================
--- libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.copy_file/copy_file.pass.cpp
+++ libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.copy_file/copy_file.pass.cpp
@@ -53,7 +53,9 @@
   scoped_test_env env;
   const path file = env.create_file("file1", 42);
   const path file2 = env.create_file("file2", 55);
+#ifndef _WIN32
   const path non_regular_file = env.create_fifo("non_reg");
+#endif
   const path dne = env.make_env_path("dne");
 
   { // exists(to) && equivalent(to, from)
@@ -75,6 +77,7 @@
   }
 }
 
+#ifndef _WIN32
 TEST_CASE(non_regular_file_test) {
   scoped_test_env env;
   const path fifo = env.create_fifo("fifo");
@@ -96,6 +99,7 @@
   }
 
 }
+#endif
 
 TEST_CASE(test_attributes_get_copied) {
   scoped_test_env env;
Index: libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.equivalent/equivalent.pass.cpp
===================================================================
--- libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.equivalent/equivalent.pass.cpp
+++ libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.equivalent/equivalent.pass.cpp
@@ -97,6 +97,7 @@
   TEST_CHECK(equivalent(hl1, hl2));
 }
 
+#ifndef _WIN32
 TEST_CASE(equivalent_is_other_succeeds) {
   scoped_test_env env;
   path const file = env.create_file("file", 42);
@@ -109,5 +110,6 @@
   TEST_CHECK(!equivalent(fifo1, fifo2));
   TEST_CHECK(equivalent(fifo1, fifo1));
 }
+#endif
 
 TEST_SUITE_END()
Index: libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.is_empty/is_empty.pass.cpp
===================================================================
--- libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.is_empty/is_empty.pass.cpp
+++ libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.is_empty/is_empty.pass.cpp
@@ -95,6 +95,7 @@
 }
 
 
+#ifndef _WIN32
 TEST_CASE(test_fifo_fails)
 {
     scoped_test_env env;
@@ -107,5 +108,6 @@
 
     TEST_CHECK_THROW(filesystem_error, is_empty(fifo));
 }
+#endif
 
 TEST_SUITE_END()
Index: libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.status/status.pass.cpp
===================================================================
--- libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.status/status.pass.cpp
+++ libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.status/status.pass.cpp
@@ -118,7 +118,9 @@
 #if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(_WIN32) // No support for domain sockets
         {env.create_socket("socket"), file_type::socket},
 #endif
+#ifndef _WIN32
         {env.create_fifo("fifo"), file_type::fifo}
+#endif
     };
     for (const auto& TC : cases) {
         // test non-throwing case
Index: libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.symlink_status/symlink_status.pass.cpp
===================================================================
--- libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.symlink_status/symlink_status.pass.cpp
+++ libcxx/test/std/input.output/filesystems/fs.op.funcs/fs.op.symlink_status/symlink_status.pass.cpp
@@ -126,7 +126,9 @@
 #if !defined(__APPLE__) && !defined(__FreeBSD__) && !defined(_WIN32) // No support for domain sockets
         {env.create_socket("socket"), file_type::socket},
 #endif
+#ifndef _WIN32
         {env.create_fifo("fifo"), file_type::fifo}
+#endif
     };
     for (const auto& TC : cases) {
         // test non-throwing case