diff --git a/test/std/input.output/file.streams/c.files/cstdio.pass.cpp b/test/std/input.output/file.streams/c.files/cstdio.pass.cpp
index 2ea09bc..ec4ad8a 100644
--- a/test/std/input.output/file.streams/c.files/cstdio.pass.cpp
+++ b/test/std/input.output/file.streams/c.files/cstdio.pass.cpp
@@ -88,31 +88,17 @@
     std::size_t s = 0;
     char* cp = 0;
     std::va_list va;
-#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
-    static_assert((std::is_same<decltype(std::remove("")), int>::value), "");
-    static_assert((std::is_same<decltype(std::rename("","")), int>::value), "");
-    static_assert((std::is_same<decltype(std::tmpfile()), std::FILE*>::value), "");
-    static_assert((std::is_same<decltype(std::tmpnam(cp)), char*>::value), "");
-#endif
     static_assert((std::is_same<decltype(std::fclose(fp)), int>::value), "");
     static_assert((std::is_same<decltype(std::fflush(fp)), int>::value), "");
-#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
-    static_assert((std::is_same<decltype(std::fopen("", "")), std::FILE*>::value), "");
-    static_assert((std::is_same<decltype(std::freopen("", "", fp)), std::FILE*>::value), "");
-#endif
     static_assert((std::is_same<decltype(std::setbuf(fp,cp)), void>::value), "");
     static_assert((std::is_same<decltype(std::vfprintf(fp,"",va)), int>::value), "");
     static_assert((std::is_same<decltype(std::fprintf(fp," ")), int>::value), "");
     static_assert((std::is_same<decltype(std::fscanf(fp,"")), int>::value), "");
-    static_assert((std::is_same<decltype(std::printf(" ")), int>::value), "");
-    static_assert((std::is_same<decltype(std::scanf(" ")), int>::value), "");
     static_assert((std::is_same<decltype(std::snprintf(cp,0," ")), int>::value), "");
     static_assert((std::is_same<decltype(std::sprintf(cp," ")), int>::value), "");
     static_assert((std::is_same<decltype(std::sscanf("","")), int>::value), "");
     static_assert((std::is_same<decltype(std::vfprintf(fp,"",va)), int>::value), "");
     static_assert((std::is_same<decltype(std::vfscanf(fp,"",va)), int>::value), "");
-    static_assert((std::is_same<decltype(std::vprintf(" ",va)), int>::value), "");
-    static_assert((std::is_same<decltype(std::vscanf("",va)), int>::value), "");
     static_assert((std::is_same<decltype(std::vsnprintf(cp,0," ",va)), int>::value), "");
     static_assert((std::is_same<decltype(std::vsprintf(cp," ",va)), int>::value), "");
     static_assert((std::is_same<decltype(std::vsscanf("","",va)), int>::value), "");
@@ -121,13 +107,7 @@
     static_assert((std::is_same<decltype(std::fputc(0,fp)), int>::value), "");
     static_assert((std::is_same<decltype(std::fputs("",fp)), int>::value), "");
     static_assert((std::is_same<decltype(std::getc(fp)), int>::value), "");
-    static_assert((std::is_same<decltype(std::getchar()), int>::value), "");
-#if _LIBCPP_STD_VER <= 11
-    static_assert((std::is_same<decltype(std::gets(cp)), char*>::value), "");
-#endif
     static_assert((std::is_same<decltype(std::putc(0,fp)), int>::value), "");
-    static_assert((std::is_same<decltype(std::putchar(0)), int>::value), "");
-    static_assert((std::is_same<decltype(std::puts("")), int>::value), "");
     static_assert((std::is_same<decltype(std::ungetc(0,fp)), int>::value), "");
     static_assert((std::is_same<decltype(std::fread((void*)0,0,0,fp)), std::size_t>::value), "");
     static_assert((std::is_same<decltype(std::fwrite((const void*)0,0,0,fp)), std::size_t>::value), "");
@@ -140,4 +120,29 @@
     static_assert((std::is_same<decltype(std::feof(fp)), int>::value), "");
     static_assert((std::is_same<decltype(std::ferror(fp)), int>::value), "");
     static_assert((std::is_same<decltype(std::perror("")), void>::value), "");
+
+#ifndef _LIBCPP_HAS_NO_GLOBAL_FILESYSTEM_NAMESPACE
+    static_assert((std::is_same<decltype(std::fopen("", "")), std::FILE*>::value), "");
+    static_assert((std::is_same<decltype(std::freopen("", "", fp)), std::FILE*>::value), "");
+    static_assert((std::is_same<decltype(std::remove("")), int>::value), "");
+    static_assert((std::is_same<decltype(std::rename("","")), int>::value), "");
+    static_assert((std::is_same<decltype(std::tmpfile()), std::FILE*>::value), "");
+    static_assert((std::is_same<decltype(std::tmpnam(cp)), char*>::value), "");
+#endif
+
+#ifndef _LIBCPP_HAS_NO_STDIN
+    static_assert((std::is_same<decltype(std::getchar()), int>::value), "");
+#if _LIBCPP_STD_VER <= 11
+    static_assert((std::is_same<decltype(std::gets(cp)), char*>::value), "");
+#endif
+    static_assert((std::is_same<decltype(std::scanf(" ")), int>::value), "");
+    static_assert((std::is_same<decltype(std::vscanf("",va)), int>::value), "");
+#endif
+
+#ifndef _LIBCPP_HAS_NO_STDOUT
+    static_assert((std::is_same<decltype(std::printf(" ")), int>::value), "");
+    static_assert((std::is_same<decltype(std::putchar(0)), int>::value), "");
+    static_assert((std::is_same<decltype(std::puts("")), int>::value), "");
+    static_assert((std::is_same<decltype(std::vprintf(" ",va)), int>::value), "");
+#endif
 }
diff --git a/test/std/input.output/iostream.objects/narrow.stream.objects/cerr.pass.cpp b/test/std/input.output/iostream.objects/narrow.stream.objects/cerr.pass.cpp
index 9206d17..cdf53f8 100644
--- a/test/std/input.output/iostream.objects/narrow.stream.objects/cerr.pass.cpp
+++ b/test/std/input.output/iostream.objects/narrow.stream.objects/cerr.pass.cpp
@@ -19,7 +19,11 @@
 #if 0
     std::cerr << "Hello World!\n";
 #else
+#ifdef _LIBCPP_HAS_NO_STDOUT
+    assert(std::cerr.tie() == NULL);
+#else
     assert(std::cerr.tie() == &std::cout);
+#endif
     assert(std::cerr.flags() & std::ios_base::unitbuf);
 #endif  // 0
 }
diff --git a/test/std/input.output/iostream.objects/narrow.stream.objects/cin.pass.cpp b/test/std/input.output/iostream.objects/narrow.stream.objects/cin.pass.cpp
index 3481598..1ce04ff 100644
--- a/test/std/input.output/iostream.objects/narrow.stream.objects/cin.pass.cpp
+++ b/test/std/input.output/iostream.objects/narrow.stream.objects/cin.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// XFAIL: libcpp-has-no-stdin
+
 // <iostream>
 
 // istream cin;
@@ -23,6 +25,10 @@
     std::cin >> i;
     std::cout << "The number is : " << i << '\n';
 #else  // 0
+#ifdef _LIBCPP_HAS_NO_STDOUT
+    assert(std::cin.tie() == NULL);
+#else
     assert(std::cin.tie() == &std::cout);
 #endif
+#endif
 }
diff --git a/test/std/input.output/iostream.objects/narrow.stream.objects/cout.pass.cpp b/test/std/input.output/iostream.objects/narrow.stream.objects/cout.pass.cpp
index 6000ae2..e5887e1 100644
--- a/test/std/input.output/iostream.objects/narrow.stream.objects/cout.pass.cpp
+++ b/test/std/input.output/iostream.objects/narrow.stream.objects/cout.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// XFAIL: libcpp-has-no-stdout
+
 // <iostream>
 
 // istream cout;
diff --git a/test/std/input.output/iostream.objects/wide.stream.objects/wcerr.pass.cpp b/test/std/input.output/iostream.objects/wide.stream.objects/wcerr.pass.cpp
index 19a1dcd..b050781 100644
--- a/test/std/input.output/iostream.objects/wide.stream.objects/wcerr.pass.cpp
+++ b/test/std/input.output/iostream.objects/wide.stream.objects/wcerr.pass.cpp
@@ -19,7 +19,11 @@
 #if 0
     std::wcerr << L"Hello World!\n";
 #else
+#ifdef _LIBCPP_HAS_NO_STDOUT
+    assert(std::wcerr.tie() == NULL);
+#else
     assert(std::wcerr.tie() == &std::wcout);
+#endif
     assert(std::wcerr.flags() & std::ios_base::unitbuf);
 #endif  // 0
 }
diff --git a/test/std/input.output/iostream.objects/wide.stream.objects/wcin.pass.cpp b/test/std/input.output/iostream.objects/wide.stream.objects/wcin.pass.cpp
index 90a5668..6abd6af 100644
--- a/test/std/input.output/iostream.objects/wide.stream.objects/wcin.pass.cpp
+++ b/test/std/input.output/iostream.objects/wide.stream.objects/wcin.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// XFAIL: libcpp-has-no-stdin
+
 // <iostream>
 
 // istream wcin;
@@ -23,6 +25,10 @@
     std::wcin >> i;
     std::wcout << L"The number is : " << i << L'\n';
 #else  // 0
+#ifdef _LIBCPP_HAS_NO_STDOUT
+    assert(std::wcin.tie() == NULL);
+#else
     assert(std::wcin.tie() == &std::wcout);
 #endif
+#endif
 }
diff --git a/test/std/input.output/iostream.objects/wide.stream.objects/wcout.pass.cpp b/test/std/input.output/iostream.objects/wide.stream.objects/wcout.pass.cpp
index 7a546aa..6543e0a 100644
--- a/test/std/input.output/iostream.objects/wide.stream.objects/wcout.pass.cpp
+++ b/test/std/input.output/iostream.objects/wide.stream.objects/wcout.pass.cpp
@@ -7,6 +7,8 @@
 //
 //===----------------------------------------------------------------------===//
 
+// XFAIL: libcpp-has-no-stdout
+
 // <iostream>
 
 // istream wcout;
diff --git a/test/std/strings/c.strings/cwchar.pass.cpp b/test/std/strings/c.strings/cwchar.pass.cpp
index d0481b7..c3d868f 100644
--- a/test/std/strings/c.strings/cwchar.pass.cpp
+++ b/test/std/strings/c.strings/cwchar.pass.cpp
@@ -50,19 +50,13 @@
     static_assert((std::is_same<decltype(std::vfwscanf(fp, L"", va)), int>::value), "");
     static_assert((std::is_same<decltype(std::vswprintf(ws, s, L"", va)), int>::value), "");
     static_assert((std::is_same<decltype(std::vswscanf(L"", L"", va)), int>::value), "");
-    static_assert((std::is_same<decltype(std::vwprintf(L"", va)), int>::value), "");
-    static_assert((std::is_same<decltype(std::vwscanf(L"", va)), int>::value), "");
-    static_assert((std::is_same<decltype(std::wprintf(L"")), int>::value), "");
-    static_assert((std::is_same<decltype(std::wscanf(L"")), int>::value), "");
     static_assert((std::is_same<decltype(std::fgetwc(fp)), std::wint_t>::value), "");
     static_assert((std::is_same<decltype(std::fgetws(ws, 0, fp)), wchar_t*>::value), "");
     static_assert((std::is_same<decltype(std::fputwc(L' ', fp)), std::wint_t>::value), "");
     static_assert((std::is_same<decltype(std::fputws(L"", fp)), int>::value), "");
     static_assert((std::is_same<decltype(std::fwide(fp, 0)), int>::value), "");
     static_assert((std::is_same<decltype(std::getwc(fp)), std::wint_t>::value), "");
-    static_assert((std::is_same<decltype(std::getwchar()), std::wint_t>::value), "");
     static_assert((std::is_same<decltype(std::putwc(L' ', fp)), std::wint_t>::value), "");
-    static_assert((std::is_same<decltype(std::putwchar(L' ')), std::wint_t>::value), "");
     static_assert((std::is_same<decltype(std::ungetwc(L' ', fp)), std::wint_t>::value), "");
     static_assert((std::is_same<decltype(std::wcstod(L"", (wchar_t**)0)), double>::value), "");
     static_assert((std::is_same<decltype(std::wcstof(L"", (wchar_t**)0)), float>::value), "");
@@ -106,4 +100,16 @@
     static_assert((std::is_same<decltype(std::wcrtomb(ns, L' ', &mb)), std::size_t>::value), "");
     static_assert((std::is_same<decltype(std::mbsrtowcs(ws, (const char**)0, s, &mb)), std::size_t>::value), "");
     static_assert((std::is_same<decltype(std::wcsrtombs(ns, (const wchar_t**)0, s, &mb)), std::size_t>::value), "");
+
+#ifndef _LIBCPP_HAS_NO_STDIN
+    static_assert((std::is_same<decltype(std::getwchar()), std::wint_t>::value), "");
+    static_assert((std::is_same<decltype(std::vwscanf(L"", va)), int>::value), "");
+    static_assert((std::is_same<decltype(std::wscanf(L"")), int>::value), "");
+#endif
+
+#ifndef _LIBCPP_HAS_NO_STDOUT
+    static_assert((std::is_same<decltype(std::putwchar(L' ')), std::wint_t>::value), "");
+    static_assert((std::is_same<decltype(std::vwprintf(L"", va)), int>::value), "");
+    static_assert((std::is_same<decltype(std::wprintf(L"")), int>::value), "");
+#endif
 }