diff --git a/test/input.output/file.streams/fstreams/filebuf.assign/member_swap.pass.cpp b/test/input.output/file.streams/fstreams/filebuf.assign/member_swap.pass.cpp
index 10aa05d45..86844343e 100644
--- a/test/input.output/file.streams/fstreams/filebuf.assign/member_swap.pass.cpp
+++ b/test/input.output/file.streams/fstreams/filebuf.assign/member_swap.pass.cpp
@@ -16,14 +16,14 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
         std::filebuf f;
-        assert(f.open(temp, std::ios_base::out | std::ios_base::in
+        assert(f.open(temp.c_str(), std::ios_base::out | std::ios_base::in
                                                | std::ios_base::trunc) != 0);
         assert(f.is_open());
         assert(f.sputn("123", 3) == 3);
@@ -35,10 +35,10 @@ int main()
         assert(f2.is_open());
         assert(f2.sgetc() == '2');
     }
-    remove(temp);
+    std::remove(temp.c_str());
     {
         std::wfilebuf f;
-        assert(f.open(temp, std::ios_base::out | std::ios_base::in
+        assert(f.open(temp.c_str(), std::ios_base::out | std::ios_base::in
                                                | std::ios_base::trunc) != 0);
         assert(f.is_open());
         assert(f.sputn(L"123", 3) == 3);
@@ -50,5 +50,5 @@ int main()
         assert(f2.is_open());
         assert(f2.sgetc() == L'2');
     }
-    remove(temp);
+    std::remove(temp.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/filebuf.assign/move_assign.pass.cpp b/test/input.output/file.streams/fstreams/filebuf.assign/move_assign.pass.cpp
index 739f99480..a92ec872a 100644
--- a/test/input.output/file.streams/fstreams/filebuf.assign/move_assign.pass.cpp
+++ b/test/input.output/file.streams/fstreams/filebuf.assign/move_assign.pass.cpp
@@ -16,15 +16,15 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
         std::filebuf f;
-        assert(f.open(temp, std::ios_base::out | std::ios_base::in
+        assert(f.open(temp.c_str(), std::ios_base::out | std::ios_base::in
                                                | std::ios_base::trunc) != 0);
         assert(f.is_open());
         assert(f.sputn("123", 3) == 3);
@@ -36,10 +36,10 @@ int main()
         assert(f2.is_open());
         assert(f2.sgetc() == '2');
     }
-    remove(temp);
+    std::remove(temp.c_str());
     {
         std::wfilebuf f;
-        assert(f.open(temp, std::ios_base::out | std::ios_base::in
+        assert(f.open(temp.c_str(), std::ios_base::out | std::ios_base::in
                                                | std::ios_base::trunc) != 0);
         assert(f.is_open());
         assert(f.sputn(L"123", 3) == 3);
@@ -51,6 +51,6 @@ int main()
         assert(f2.is_open());
         assert(f2.sgetc() == L'2');
     }
-    remove(temp);
+    std::remove(temp.c_str());
 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/input.output/file.streams/fstreams/filebuf.assign/nonmember_swap.pass.cpp b/test/input.output/file.streams/fstreams/filebuf.assign/nonmember_swap.pass.cpp
index 9a9b28ce4..084d00103 100644
--- a/test/input.output/file.streams/fstreams/filebuf.assign/nonmember_swap.pass.cpp
+++ b/test/input.output/file.streams/fstreams/filebuf.assign/nonmember_swap.pass.cpp
@@ -18,14 +18,14 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
         std::filebuf f;
-        assert(f.open(temp, std::ios_base::out | std::ios_base::in
+        assert(f.open(temp.c_str(), std::ios_base::out | std::ios_base::in
                                                | std::ios_base::trunc) != 0);
         assert(f.is_open());
         assert(f.sputn("123", 3) == 3);
@@ -37,10 +37,10 @@ int main()
         assert(f2.is_open());
         assert(f2.sgetc() == '2');
     }
-    remove(temp);
+    std::remove(temp.c_str());
     {
         std::wfilebuf f;
-        assert(f.open(temp, std::ios_base::out | std::ios_base::in
+        assert(f.open(temp.c_str(), std::ios_base::out | std::ios_base::in
                                                | std::ios_base::trunc) != 0);
         assert(f.is_open());
         assert(f.sputn(L"123", 3) == 3);
@@ -52,5 +52,5 @@ int main()
         assert(f2.is_open());
         assert(f2.sgetc() == L'2');
     }
-    remove(temp);
+    std::remove(temp.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/filebuf.cons/move.pass.cpp b/test/input.output/file.streams/fstreams/filebuf.cons/move.pass.cpp
index 352a98091..f13ee4470 100644
--- a/test/input.output/file.streams/fstreams/filebuf.cons/move.pass.cpp
+++ b/test/input.output/file.streams/fstreams/filebuf.cons/move.pass.cpp
@@ -16,15 +16,15 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
         std::filebuf f;
-        assert(f.open(temp, std::ios_base::out | std::ios_base::in
+        assert(f.open(temp.c_str(), std::ios_base::out | std::ios_base::in
                                                | std::ios_base::trunc) != 0);
         assert(f.is_open());
         assert(f.sputn("123", 3) == 3);
@@ -35,10 +35,10 @@ int main()
         assert(f2.is_open());
         assert(f2.sgetc() == '2');
     }
-    remove(temp);
+    std::remove(temp.c_str());
     {
         std::wfilebuf f;
-        assert(f.open(temp, std::ios_base::out | std::ios_base::in
+        assert(f.open(temp.c_str(), std::ios_base::out | std::ios_base::in
                                                | std::ios_base::trunc) != 0);
         assert(f.is_open());
         assert(f.sputn(L"123", 3) == 3);
@@ -49,6 +49,6 @@ int main()
         assert(f2.is_open());
         assert(f2.sgetc() == L'2');
     }
-    remove(temp);
+    std::remove(temp.c_str());
 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/input.output/file.streams/fstreams/filebuf.members/open_pointer.pass.cpp b/test/input.output/file.streams/fstreams/filebuf.members/open_pointer.pass.cpp
index 192e65f55..9d2d56782 100644
--- a/test/input.output/file.streams/fstreams/filebuf.members/open_pointer.pass.cpp
+++ b/test/input.output/file.streams/fstreams/filebuf.members/open_pointer.pass.cpp
@@ -13,39 +13,39 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
         std::filebuf f;
-        assert(f.open(temp, std::ios_base::out) != 0);
+        assert(f.open(temp.c_str(), std::ios_base::out) != 0);
         assert(f.is_open());
         assert(f.sputn("123", 3) == 3);
     }
     {
         std::filebuf f;
-        assert(f.open(temp, std::ios_base::in) != 0);
+        assert(f.open(temp.c_str(), std::ios_base::in) != 0);
         assert(f.is_open());
         assert(f.sbumpc() == '1');
         assert(f.sbumpc() == '2');
         assert(f.sbumpc() == '3');
     }
-    remove(temp);
+    std::remove(temp.c_str());
     {
         std::wfilebuf f;
-        assert(f.open(temp, std::ios_base::out) != 0);
+        assert(f.open(temp.c_str(), std::ios_base::out) != 0);
         assert(f.is_open());
         assert(f.sputn(L"123", 3) == 3);
     }
     {
         std::wfilebuf f;
-        assert(f.open(temp, std::ios_base::in) != 0);
+        assert(f.open(temp.c_str(), std::ios_base::in) != 0);
         assert(f.is_open());
         assert(f.sbumpc() == L'1');
         assert(f.sbumpc() == L'2');
         assert(f.sbumpc() == L'3');
     }
-    remove(temp);
+    remove(temp.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/fstream.assign/member_swap.pass.cpp b/test/input.output/file.streams/fstreams/fstream.assign/member_swap.pass.cpp
index 4cae835ea..fcc86a13f 100644
--- a/test/input.output/file.streams/fstreams/fstream.assign/member_swap.pass.cpp
+++ b/test/input.output/file.streams/fstreams/fstream.assign/member_swap.pass.cpp
@@ -16,16 +16,16 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp1[L_tmpnam], temp2[L_tmpnam];
-    tmpnam(temp1);
-    tmpnam(temp2);
+    std::string temp1 = get_temp_file_name();
+    std::string temp2 = get_temp_file_name();
     {
-        std::fstream fs1(temp1, std::ios_base::in | std::ios_base::out
+        std::fstream fs1(temp1.c_str(), std::ios_base::in | std::ios_base::out
                                                   | std::ios_base::trunc);
-        std::fstream fs2(temp2, std::ios_base::in | std::ios_base::out
+        std::fstream fs2(temp2.c_str(), std::ios_base::in | std::ios_base::out
                                                   | std::ios_base::trunc);
         fs1 << 1 << ' ' << 2;
         fs2 << 2 << ' ' << 1;
@@ -43,12 +43,12 @@ int main()
         fs2 >> i;
         assert(i == 2);
     }
-    std::remove(temp1);
-    std::remove(temp2);
+    std::remove(temp1.c_str());
+    std::remove(temp2.c_str());
     {
-        std::wfstream fs1(temp1, std::ios_base::in | std::ios_base::out
+        std::wfstream fs1(temp1.c_str(), std::ios_base::in | std::ios_base::out
                                                    | std::ios_base::trunc);
-        std::wfstream fs2(temp2, std::ios_base::in | std::ios_base::out
+        std::wfstream fs2(temp2.c_str(), std::ios_base::in | std::ios_base::out
                                                    | std::ios_base::trunc);
         fs1 << 1 << ' ' << 2;
         fs2 << 2 << ' ' << 1;
@@ -66,6 +66,6 @@ int main()
         fs2 >> i;
         assert(i == 2);
     }
-    std::remove(temp1);
-    std::remove(temp2);
+    std::remove(temp1.c_str());
+    std::remove(temp2.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/fstream.assign/move_assign.pass.cpp b/test/input.output/file.streams/fstreams/fstream.assign/move_assign.pass.cpp
index 51cf41fdf..b5157e90e 100644
--- a/test/input.output/file.streams/fstreams/fstream.assign/move_assign.pass.cpp
+++ b/test/input.output/file.streams/fstreams/fstream.assign/move_assign.pass.cpp
@@ -16,14 +16,14 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
-        std::fstream fso(temp, std::ios_base::in | std::ios_base::out
+        std::fstream fso(temp.c_str(), std::ios_base::in | std::ios_base::out
                                                  | std::ios_base::trunc);
         std::fstream fs;
         fs = move(fso);
@@ -33,9 +33,9 @@ int main()
         fs >> x;
         assert(x == 3.25);
     }
-    std::remove(temp);
+    std::remove(temp.c_str());
     {
-        std::wfstream fso(temp, std::ios_base::in | std::ios_base::out
+        std::wfstream fso(temp.c_str(), std::ios_base::in | std::ios_base::out
                                                   | std::ios_base::trunc);
         std::wfstream fs;
         fs = move(fso);
@@ -45,6 +45,6 @@ int main()
         fs >> x;
         assert(x == 3.25);
     }
-    std::remove(temp);
+    std::remove(temp.c_str());
 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/input.output/file.streams/fstreams/fstream.assign/nonmember_swap.pass.cpp b/test/input.output/file.streams/fstreams/fstream.assign/nonmember_swap.pass.cpp
index 27ee8427f..0a4f7240d 100644
--- a/test/input.output/file.streams/fstreams/fstream.assign/nonmember_swap.pass.cpp
+++ b/test/input.output/file.streams/fstreams/fstream.assign/nonmember_swap.pass.cpp
@@ -17,16 +17,16 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp1[L_tmpnam], temp2[L_tmpnam];
-    tmpnam(temp1);
-    tmpnam(temp2);
+    std::string temp1 = get_temp_file_name();
+    std::string temp2 = get_temp_file_name();
     {
-        std::fstream fs1(temp1, std::ios_base::in | std::ios_base::out
+        std::fstream fs1(temp1.c_str(), std::ios_base::in | std::ios_base::out
                                                   | std::ios_base::trunc);
-        std::fstream fs2(temp2, std::ios_base::in | std::ios_base::out
+        std::fstream fs2(temp2.c_str(), std::ios_base::in | std::ios_base::out
                                                   | std::ios_base::trunc);
         fs1 << 1 << ' ' << 2;
         fs2 << 2 << ' ' << 1;
@@ -44,12 +44,12 @@ int main()
         fs2 >> i;
         assert(i == 2);
     }
-    std::remove(temp1);
-    std::remove(temp2);
+    std::remove(temp1.c_str());
+    std::remove(temp2.c_str());
     {
-        std::wfstream fs1(temp1, std::ios_base::in | std::ios_base::out
+        std::wfstream fs1(temp1.c_str(), std::ios_base::in | std::ios_base::out
                                                    | std::ios_base::trunc);
-        std::wfstream fs2(temp2, std::ios_base::in | std::ios_base::out
+        std::wfstream fs2(temp2.c_str(), std::ios_base::in | std::ios_base::out
                                                    | std::ios_base::trunc);
         fs1 << 1 << ' ' << 2;
         fs2 << 2 << ' ' << 1;
@@ -67,6 +67,6 @@ int main()
         fs2 >> i;
         assert(i == 2);
     }
-    std::remove(temp1);
-    std::remove(temp2);
+    std::remove(temp1.c_str());
+    std::remove(temp2.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/fstream.cons/move.pass.cpp b/test/input.output/file.streams/fstreams/fstream.cons/move.pass.cpp
index 28e3c95d4..d2ae30286 100644
--- a/test/input.output/file.streams/fstreams/fstream.cons/move.pass.cpp
+++ b/test/input.output/file.streams/fstreams/fstream.cons/move.pass.cpp
@@ -16,12 +16,12 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
         std::fstream fso(temp, std::ios_base::in | std::ios_base::out
                                                  | std::ios_base::trunc);
@@ -32,7 +32,7 @@ int main()
         fs >> x;
         assert(x == 3.25);
     }
-    std::remove("test.dat");
+    std::remove(temp.c_str());
     {
         std::wfstream fso(temp, std::ios_base::in | std::ios_base::out
                                                   | std::ios_base::trunc);
@@ -43,6 +43,6 @@ int main()
         fs >> x;
         assert(x == 3.25);
     }
-    std::remove(temp);
+    std::remove(temp.c_str());
 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/input.output/file.streams/fstreams/fstream.cons/pointer.pass.cpp b/test/input.output/file.streams/fstreams/fstream.cons/pointer.pass.cpp
index a31f9a1d5..06a6b7794 100644
--- a/test/input.output/file.streams/fstreams/fstream.cons/pointer.pass.cpp
+++ b/test/input.output/file.streams/fstreams/fstream.cons/pointer.pass.cpp
@@ -16,13 +16,13 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
-        std::fstream fs(temp, std::ios_base::in | std::ios_base::out
+        std::fstream fs(temp.c_str(), std::ios_base::in | std::ios_base::out
                                                 | std::ios_base::trunc);
         double x = 0;
         fs << 3.25;
@@ -30,9 +30,9 @@ int main()
         fs >> x;
         assert(x == 3.25);
     }
-    std::remove(temp);
+    std::remove(temp.c_str());
     {
-        std::wfstream fs(temp, std::ios_base::in | std::ios_base::out
+        std::wfstream fs(temp.c_str(), std::ios_base::in | std::ios_base::out
                                                  | std::ios_base::trunc);
         double x = 0;
         fs << 3.25;
@@ -40,5 +40,5 @@ int main()
         fs >> x;
         assert(x == 3.25);
     }
-    std::remove(temp);
+    std::remove(temp.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/fstream.cons/string.pass.cpp b/test/input.output/file.streams/fstreams/fstream.cons/string.pass.cpp
index 23795f010..4b0819f8a 100644
--- a/test/input.output/file.streams/fstreams/fstream.cons/string.pass.cpp
+++ b/test/input.output/file.streams/fstreams/fstream.cons/string.pass.cpp
@@ -16,13 +16,13 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
-        std::fstream fs(std::string(temp),
+        std::fstream fs(temp,
                         std::ios_base::in | std::ios_base::out
                                           | std::ios_base::trunc);
         double x = 0;
@@ -31,9 +31,9 @@ int main()
         fs >> x;
         assert(x == 3.25);
     }
-    std::remove(temp);
+    std::remove(temp.c_str());
     {
-        std::wfstream fs(std::string(temp),
+        std::wfstream fs(temp,
                          std::ios_base::in | std::ios_base::out
                                            | std::ios_base::trunc);
         double x = 0;
@@ -42,5 +42,5 @@ int main()
         fs >> x;
         assert(x == 3.25);
     }
-    std::remove(temp);
+    std::remove(temp.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/fstream.members/close.pass.cpp b/test/input.output/file.streams/fstreams/fstream.members/close.pass.cpp
index 94b91806f..0e4bc7177 100644
--- a/test/input.output/file.streams/fstreams/fstream.members/close.pass.cpp
+++ b/test/input.output/file.streams/fstreams/fstream.members/close.pass.cpp
@@ -16,27 +16,27 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
         std::fstream fs;
         assert(!fs.is_open());
-        fs.open(temp, std::ios_base::out);
+        fs.open(temp.c_str(), std::ios_base::out);
         assert(fs.is_open());
         fs.close();
         assert(!fs.is_open());
     }
-    remove(temp);
+    std::remove(temp.c_str());
     {
         std::wfstream fs;
         assert(!fs.is_open());
-        fs.open(temp, std::ios_base::out);
+        fs.open(temp.c_str(), std::ios_base::out);
         assert(fs.is_open());
         fs.close();
         assert(!fs.is_open());
     }
-    remove(temp);
+    std::remove(temp.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/fstream.members/open_pointer.pass.cpp b/test/input.output/file.streams/fstreams/fstream.members/open_pointer.pass.cpp
index 64c4de9df..231bb82c7 100644
--- a/test/input.output/file.streams/fstreams/fstream.members/open_pointer.pass.cpp
+++ b/test/input.output/file.streams/fstreams/fstream.members/open_pointer.pass.cpp
@@ -16,15 +16,15 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
         std::fstream fs;
         assert(!fs.is_open());
-        fs.open(temp, std::ios_base::in | std::ios_base::out
+        fs.open(temp.c_str(), std::ios_base::in | std::ios_base::out
                                         | std::ios_base::trunc);
         assert(fs.is_open());
         double x = 0;
@@ -33,11 +33,11 @@ int main()
         fs >> x;
         assert(x == 3.25);
     }
-    std::remove(temp);
+    std::remove(temp.c_str());
     {
         std::wfstream fs;
         assert(!fs.is_open());
-        fs.open(temp, std::ios_base::in | std::ios_base::out
+        fs.open(temp.c_str(), std::ios_base::in | std::ios_base::out
                                         | std::ios_base::trunc);
         assert(fs.is_open());
         double x = 0;
@@ -46,5 +46,5 @@ int main()
         fs >> x;
         assert(x == 3.25);
     }
-    std::remove(temp);
+    std::remove(temp.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/fstream.members/open_string.pass.cpp b/test/input.output/file.streams/fstreams/fstream.members/open_string.pass.cpp
index a61a4e965..182f12c47 100644
--- a/test/input.output/file.streams/fstreams/fstream.members/open_string.pass.cpp
+++ b/test/input.output/file.streams/fstreams/fstream.members/open_string.pass.cpp
@@ -16,15 +16,15 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
         std::fstream fs;
         assert(!fs.is_open());
-        fs.open(std::string(temp), std::ios_base::in | std::ios_base::out
+        fs.open(temp, std::ios_base::in | std::ios_base::out
                                                      | std::ios_base::trunc);
         assert(fs.is_open());
         double x = 0;
@@ -33,11 +33,11 @@ int main()
         fs >> x;
         assert(x == 3.25);
     }
-    std::remove(temp);
+    std::remove(temp.c_str());
     {
         std::wfstream fs;
         assert(!fs.is_open());
-        fs.open(std::string(temp), std::ios_base::in | std::ios_base::out
+        fs.open(temp, std::ios_base::in | std::ios_base::out
                                                      | std::ios_base::trunc);
         assert(fs.is_open());
         double x = 0;
@@ -46,5 +46,5 @@ int main()
         fs >> x;
         assert(x == 3.25);
     }
-    std::remove(temp);
+    std::remove(temp.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/ofstream.assign/member_swap.pass.cpp b/test/input.output/file.streams/fstreams/ofstream.assign/member_swap.pass.cpp
index 7800c1abe..519b84fb1 100644
--- a/test/input.output/file.streams/fstreams/ofstream.assign/member_swap.pass.cpp
+++ b/test/input.output/file.streams/fstreams/ofstream.assign/member_swap.pass.cpp
@@ -16,15 +16,15 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp1[L_tmpnam], temp2[L_tmpnam];
-    tmpnam(temp1);
-    tmpnam(temp2);
+    std::string temp1 = get_temp_file_name();
+    std::string temp2 = get_temp_file_name();
     {
-        std::ofstream fs1(temp1);
-        std::ofstream fs2(temp2);
+        std::ofstream fs1(temp1.c_str());
+        std::ofstream fs2(temp2.c_str());
         fs1 << 3.25;
         fs2 << 4.5;
         fs1.swap(fs2);
@@ -32,26 +32,26 @@ int main()
         fs2 << ' ' << 4.5;
     }
     {
-        std::ifstream fs(temp1);
+        std::ifstream fs(temp1.c_str());
         double x = 0;
         fs >> x;
         assert(x == 3.25);
         fs >> x;
         assert(x == 4.5);
     }
-    remove(temp1);
+    std::remove(temp1.c_str());
     {
-        std::ifstream fs(temp2);
+        std::ifstream fs(temp2.c_str());
         double x = 0;
         fs >> x;
         assert(x == 4.5);
         fs >> x;
         assert(x == 3.25);
     }
-    remove(temp2);
+    std::remove(temp2.c_str());
     {
-        std::wofstream fs1(temp1);
-        std::wofstream fs2(temp2);
+        std::wofstream fs1(temp1.c_str());
+        std::wofstream fs2(temp2.c_str());
         fs1 << 3.25;
         fs2 << 4.5;
         fs1.swap(fs2);
@@ -59,21 +59,21 @@ int main()
         fs2 << ' ' << 4.5;
     }
     {
-        std::wifstream fs(temp1);
+        std::wifstream fs(temp1.c_str());
         double x = 0;
         fs >> x;
         assert(x == 3.25);
         fs >> x;
         assert(x == 4.5);
     }
-    remove(temp1);
+    std::remove(temp1.c_str());
     {
-        std::wifstream fs(temp2);
+        std::wifstream fs(temp2.c_str());
         double x = 0;
         fs >> x;
         assert(x == 4.5);
         fs >> x;
         assert(x == 3.25);
     }
-    remove(temp2);
+    std::remove(temp2.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/ofstream.assign/move_assign.pass.cpp b/test/input.output/file.streams/fstreams/ofstream.assign/move_assign.pass.cpp
index 7f80cfcc5..0f21eb81d 100644
--- a/test/input.output/file.streams/fstreams/ofstream.assign/move_assign.pass.cpp
+++ b/test/input.output/file.streams/fstreams/ofstream.assign/move_assign.pass.cpp
@@ -16,37 +16,37 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
-        std::ofstream fso(temp);
+        std::ofstream fso(temp.c_str());
         std::ofstream fs;
         fs = move(fso);
         fs << 3.25;
     }
     {
-        std::ifstream fs(temp);
+        std::ifstream fs(temp.c_str());
         double x = 0;
         fs >> x;
         assert(x == 3.25);
     }
-    remove(temp);
+    std::remove(temp.c_str());
     {
-        std::wofstream fso(temp);
+        std::wofstream fso(temp.c_str());
         std::wofstream fs;
         fs = move(fso);
         fs << 3.25;
     }
     {
-        std::wifstream fs(temp);
+        std::wifstream fs(temp.c_str());
         double x = 0;
         fs >> x;
         assert(x == 3.25);
     }
-    remove(temp);
+    std::remove(temp.c_str());
 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/input.output/file.streams/fstreams/ofstream.assign/nonmember_swap.pass.cpp b/test/input.output/file.streams/fstreams/ofstream.assign/nonmember_swap.pass.cpp
index 24deafdcf..d58f5f256 100644
--- a/test/input.output/file.streams/fstreams/ofstream.assign/nonmember_swap.pass.cpp
+++ b/test/input.output/file.streams/fstreams/ofstream.assign/nonmember_swap.pass.cpp
@@ -17,15 +17,15 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp1[L_tmpnam], temp2[L_tmpnam];
-    tmpnam(temp1);
-    tmpnam(temp2);
+    std::string temp1 = get_temp_file_name();
+    std::string temp2 = get_temp_file_name();
     {
-        std::ofstream fs1(temp1);
-        std::ofstream fs2(temp2);
+        std::ofstream fs1(temp1.c_str());
+        std::ofstream fs2(temp2.c_str());
         fs1 << 3.25;
         fs2 << 4.5;
         swap(fs1, fs2);
@@ -33,26 +33,26 @@ int main()
         fs2 << ' ' << 4.5;
     }
     {
-        std::ifstream fs(temp1);
+        std::ifstream fs(temp1.c_str());
         double x = 0;
         fs >> x;
         assert(x == 3.25);
         fs >> x;
         assert(x == 4.5);
     }
-    remove(temp1);
+    std::remove(temp1.c_str());
     {
-        std::ifstream fs(temp2);
+        std::ifstream fs(temp2.c_str());
         double x = 0;
         fs >> x;
         assert(x == 4.5);
         fs >> x;
         assert(x == 3.25);
     }
-    remove(temp2);
+    std::remove(temp2.c_str());
     {
-        std::wofstream fs1(temp1);
-        std::wofstream fs2(temp2);
+        std::wofstream fs1(temp1.c_str());
+        std::wofstream fs2(temp2.c_str());
         fs1 << 3.25;
         fs2 << 4.5;
         swap(fs1, fs2);
@@ -60,21 +60,21 @@ int main()
         fs2 << ' ' << 4.5;
     }
     {
-        std::wifstream fs(temp1);
+        std::wifstream fs(temp1.c_str());
         double x = 0;
         fs >> x;
         assert(x == 3.25);
         fs >> x;
         assert(x == 4.5);
     }
-    remove(temp1);
+    std::remove(temp1.c_str());
     {
-        std::wifstream fs(temp2);
+        std::wifstream fs(temp2.c_str());
         double x = 0;
         fs >> x;
         assert(x == 4.5);
         fs >> x;
         assert(x == 3.25);
     }
-    remove(temp2);
+    std::remove(temp2.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/ofstream.cons/move.pass.cpp b/test/input.output/file.streams/fstreams/ofstream.cons/move.pass.cpp
index 93bea0e48..8645358cb 100644
--- a/test/input.output/file.streams/fstreams/ofstream.cons/move.pass.cpp
+++ b/test/input.output/file.streams/fstreams/ofstream.cons/move.pass.cpp
@@ -16,35 +16,35 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
 #ifndef _LIBCPP_HAS_NO_RVALUE_REFERENCES
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
-        std::ofstream fso(temp);
+        std::ofstream fso(temp.c_str());
         std::ofstream fs = move(fso);
         fs << 3.25;
     }
     {
-        std::ifstream fs(temp);
+        std::ifstream fs(temp.c_str());
         double x = 0;
         fs >> x;
         assert(x == 3.25);
     }
-    remove(temp);
+    std::remove(temp.c_str());
     {
-        std::wofstream fso(temp);
+        std::wofstream fso(temp.c_str());
         std::wofstream fs = move(fso);
         fs << 3.25;
     }
     {
-        std::wifstream fs(temp);
+        std::wifstream fs(temp.c_str());
         double x = 0;
         fs >> x;
         assert(x == 3.25);
     }
-    remove(temp);
+    std::remove(temp.c_str());
 #endif  // _LIBCPP_HAS_NO_RVALUE_REFERENCES
 }
diff --git a/test/input.output/file.streams/fstreams/ofstream.cons/pointer.pass.cpp b/test/input.output/file.streams/fstreams/ofstream.cons/pointer.pass.cpp
index 7d899e776..bd5832abe 100644
--- a/test/input.output/file.streams/fstreams/ofstream.cons/pointer.pass.cpp
+++ b/test/input.output/file.streams/fstreams/ofstream.cons/pointer.pass.cpp
@@ -16,31 +16,31 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
-        std::ofstream fs(temp);
+        std::ofstream fs(temp.c_str());
         fs << 3.25;
     }
     {
-        std::ifstream fs(temp);
+        std::ifstream fs(temp.c_str());
         double x = 0;
         fs >> x;
         assert(x == 3.25);
     }
-    remove(temp);
+    std::remove(temp.c_str());
     {
-        std::wofstream fs(temp);
+        std::wofstream fs(temp.c_str());
         fs << 3.25;
     }
     {
-        std::wifstream fs(temp);
+        std::wifstream fs(temp.c_str());
         double x = 0;
         fs >> x;
         assert(x == 3.25);
     }
-    remove(temp);
+    std::remove(temp.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp b/test/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp
index 67dd02aeb..7112b17fb 100644
--- a/test/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp
+++ b/test/input.output/file.streams/fstreams/ofstream.cons/string.pass.cpp
@@ -16,31 +16,31 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
-        std::ofstream fs((std::string(temp)));
+        std::ofstream fs(temp);
         fs << 3.25;
     }
     {
-        std::ifstream fs((std::string(temp)));
+        std::ifstream fs(temp);
         double x = 0;
         fs >> x;
         assert(x == 3.25);
     }
-    remove(temp);
+    std::remove(temp.c_str());
     {
-        std::wofstream fs((std::string(temp)));
+        std::wofstream fs(temp);
         fs << 3.25;
     }
     {
-        std::wifstream fs((std::string(temp)));
+        std::wifstream fs(temp);
         double x = 0;
         fs >> x;
         assert(x == 3.25);
     }
-    remove(temp);
+    std::remove(temp.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/ofstream.members/close.pass.cpp b/test/input.output/file.streams/fstreams/ofstream.members/close.pass.cpp
index ad3f3783c..b8c358d8e 100644
--- a/test/input.output/file.streams/fstreams/ofstream.members/close.pass.cpp
+++ b/test/input.output/file.streams/fstreams/ofstream.members/close.pass.cpp
@@ -16,27 +16,27 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
         std::ofstream fs;
         assert(!fs.is_open());
-        fs.open(temp);
+        fs.open(temp.c_str());
         assert(fs.is_open());
         fs.close();
         assert(!fs.is_open());
     }
-    remove(temp);
+    std::remove(temp.c_str());
     {
         std::wofstream fs;
         assert(!fs.is_open());
-        fs.open(temp);
+        fs.open(temp.c_str());
         assert(fs.is_open());
         fs.close();
         assert(!fs.is_open());
     }
-    remove(temp);
+    std::remove(temp.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/ofstream.members/open_pointer.pass.cpp b/test/input.output/file.streams/fstreams/ofstream.members/open_pointer.pass.cpp
index bf8e6a5ca..e5cddc9e1 100644
--- a/test/input.output/file.streams/fstreams/ofstream.members/open_pointer.pass.cpp
+++ b/test/input.output/file.streams/fstreams/ofstream.members/open_pointer.pass.cpp
@@ -16,43 +16,43 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
         std::ofstream fs;
         assert(!fs.is_open());
         char c = 'a';
         fs << c;
         assert(fs.fail());
-        fs.open(temp);
+        fs.open(temp.c_str());
         assert(fs.is_open());
         fs << c;
     }
     {
-        std::ifstream fs(temp);
+        std::ifstream fs(temp.c_str());
         char c = 0;
         fs >> c;
         assert(c == 'a');
     }
-    remove(temp);
+    std::remove(temp.c_str());
     {
         std::wofstream fs;
         assert(!fs.is_open());
         wchar_t c = L'a';
         fs << c;
         assert(fs.fail());
-        fs.open(temp);
+        fs.open(temp.c_str());
         assert(fs.is_open());
         fs << c;
     }
     {
-        std::wifstream fs(temp);
+        std::wifstream fs(temp.c_str());
         wchar_t c = 0;
         fs >> c;
         assert(c == L'a');
     }
-    remove(temp);
+    std::remove(temp.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/ofstream.members/open_string.pass.cpp b/test/input.output/file.streams/fstreams/ofstream.members/open_string.pass.cpp
index b33114d97..d54aa1824 100644
--- a/test/input.output/file.streams/fstreams/ofstream.members/open_string.pass.cpp
+++ b/test/input.output/file.streams/fstreams/ofstream.members/open_string.pass.cpp
@@ -16,43 +16,43 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
         std::ofstream fs;
         assert(!fs.is_open());
         char c = 'a';
         fs << c;
         assert(fs.fail());
-        fs.open(std::string(temp));
+        fs.open(temp);
         assert(fs.is_open());
         fs << c;
     }
     {
-        std::ifstream fs(temp);
+        std::ifstream fs(temp.c_str());
         char c = 0;
         fs >> c;
         assert(c == 'a');
     }
-    remove(temp);
+    std::remove(temp.c_str());
     {
         std::wofstream fs;
         assert(!fs.is_open());
         wchar_t c = L'a';
         fs << c;
         assert(fs.fail());
-        fs.open(std::string(temp));
+        fs.open(temp);
         assert(fs.is_open());
         fs << c;
     }
     {
-        std::wifstream fs(temp);
+        std::wifstream fs(temp.c_str());
         wchar_t c = 0;
         fs >> c;
         assert(c == L'a');
     }
-    remove(temp);
+    std::remove(temp.c_str());
 }
diff --git a/test/input.output/file.streams/fstreams/ofstream.members/rdbuf.pass.cpp b/test/input.output/file.streams/fstreams/ofstream.members/rdbuf.pass.cpp
index 8860c9ae9..d707e0a32 100644
--- a/test/input.output/file.streams/fstreams/ofstream.members/rdbuf.pass.cpp
+++ b/test/input.output/file.streams/fstreams/ofstream.members/rdbuf.pass.cpp
@@ -16,21 +16,21 @@
 
 #include <fstream>
 #include <cassert>
+#include "platform_support.h"
 
 int main()
 {
-    char temp[L_tmpnam];
-    tmpnam(temp);
+    std::string temp = get_temp_file_name();
     {
-        std::ofstream fs(temp);
+        std::ofstream fs(temp.c_str());
         std::filebuf* fb = fs.rdbuf();
         assert(fb->sputc('r') == 'r');
     }
-    remove(temp);
+    std::remove(temp.c_str());
     {
-        std::wofstream fs(temp);
+        std::wofstream fs(temp.c_str());
         std::wfilebuf* fb = fs.rdbuf();
         assert(fb->sputc(L'r') == L'r');
     }
-    remove(temp);
+    std::remove(temp.c_str());
 }
diff --git a/test/support/platform_support.h b/test/support/platform_support.h
index 003597501..4633ce047 100644
--- a/test/support/platform_support.h
+++ b/test/support/platform_support.h
@@ -39,4 +39,25 @@
 #define LOCALE_zh_CN_UTF_8     "zh_CN.UTF-8"
 #endif
 
+#include <stdio.h>
+#include <stdlib.h>
+#include <string>
+
+inline
+std::string
+get_temp_file_name()
+{
+#ifdef _WIN32
+   char* p = _tempnam( NULL, NULL );
+   if (p == nullptr)
+       abort();
+    std::string s(p);
+    free( p );
+#else
+   std::string s("temp.XXXX");
+   mktemp(&s[0]);
+#endif
+   return s;
+}
+
 #endif // PLATFORM_SUPPORT_H