diff --git a/test/localization/locale.stdcvt/codecvt_utf16_in.pass.cpp b/test/localization/locale.stdcvt/codecvt_utf16_in.pass.cpp
index 0572b80e..8ced9f85 100644
--- a/test/localization/locale.stdcvt/codecvt_utf16_in.pass.cpp
+++ b/test/localization/locale.stdcvt/codecvt_utf16_in.pass.cpp
@@ -31,7 +31,7 @@ int main()
         typedef std::codecvt_utf16<wchar_t> C;
         C c;
         wchar_t w = 0;
-        char n[4] = {0xD8, 0xC0, 0xDC, 0x03};
+        char n[4] = {char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         wchar_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -70,7 +70,7 @@ int main()
         typedef std::codecvt_utf16<wchar_t, 0x1000> C;
         C c;
         wchar_t w = 0;
-        char n[4] = {0xD8, 0xC0, 0xDC, 0x03};
+        char n[4] = {char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         wchar_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -109,7 +109,7 @@ int main()
         typedef std::codecvt_utf16<wchar_t, 0x10ffff, std::consume_header> C;
         C c;
         wchar_t w = 0;
-        char n[6] = {0xFE, 0xFF, 0xD8, 0xC0, 0xDC, 0x03};
+        char n[6] = {char(0xFE), char(0xFF), char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         wchar_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -148,7 +148,7 @@ int main()
         typedef std::codecvt_utf16<wchar_t, 0x10ffff, std::little_endian> C;
         C c;
         wchar_t w = 0;
-        char n[4] = {0xC0, 0xD8, 0x03, 0xDC};
+        char n[4] = {char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         wchar_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -187,7 +187,7 @@ int main()
         typedef std::codecvt_utf16<wchar_t, 0x1000, std::little_endian> C;
         C c;
         wchar_t w = 0;
-        char n[4] = {0xC0, 0xD8, 0x03, 0xDC};
+        char n[4] = {char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         wchar_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -228,7 +228,7 @@ int main()
                                                          std::little_endian)> C;
         C c;
         wchar_t w = 0;
-        char n[6] = {0xFF, 0xFE, 0xC0, 0xD8, 0x03, 0xDC};
+        char n[6] = {char(0xFF), char(0xFE), char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         wchar_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -267,7 +267,7 @@ int main()
         typedef std::codecvt_utf16<char32_t> C;
         C c;
         char32_t w = 0;
-        char n[4] = {0xD8, 0xC0, 0xDC, 0x03};
+        char n[4] = {char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         char32_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -306,7 +306,7 @@ int main()
         typedef std::codecvt_utf16<char32_t, 0x1000> C;
         C c;
         char32_t w = 0;
-        char n[4] = {0xD8, 0xC0, 0xDC, 0x03};
+        char n[4] = {char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         char32_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -345,7 +345,7 @@ int main()
         typedef std::codecvt_utf16<char32_t, 0x10ffff, std::consume_header> C;
         C c;
         char32_t w = 0;
-        char n[6] = {0xFE, 0xFF, 0xD8, 0xC0, 0xDC, 0x03};
+        char n[6] = {char(0xFE), char(0xFF), char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         char32_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -384,7 +384,7 @@ int main()
         typedef std::codecvt_utf16<char32_t, 0x10ffff, std::little_endian> C;
         C c;
         char32_t w = 0;
-        char n[4] = {0xC0, 0xD8, 0x03, 0xDC};
+        char n[4] = {char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         char32_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -423,7 +423,7 @@ int main()
         typedef std::codecvt_utf16<char32_t, 0x1000, std::little_endian> C;
         C c;
         char32_t w = 0;
-        char n[4] = {0xC0, 0xD8, 0x03, 0xDC};
+        char n[4] = {char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         char32_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -464,7 +464,7 @@ int main()
                                                          std::little_endian)> C;
         C c;
         char32_t w = 0;
-        char n[6] = {0xFF, 0xFE, 0xC0, 0xD8, 0x03, 0xDC};
+        char n[6] = {char(0xFF), char(0xFE), char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         char32_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -504,7 +504,7 @@ int main()
         typedef std::codecvt_utf16<char16_t> C;
         C c;
         char16_t w = 0;
-        char n[4] = {0xD8, 0xC0, 0xDC, 0x03};
+        char n[4] = {char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         char16_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -543,7 +543,7 @@ int main()
         typedef std::codecvt_utf16<char16_t, 0x1000> C;
         C c;
         char16_t w = 0;
-        char n[4] = {0xD8, 0xC0, 0xDC, 0x03};
+        char n[4] = {char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         char16_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -582,7 +582,7 @@ int main()
         typedef std::codecvt_utf16<char16_t, 0x10ffff, std::consume_header> C;
         C c;
         char16_t w = 0;
-        char n[6] = {0xFE, 0xFF, 0xD8, 0xC0, 0xDC, 0x03};
+        char n[6] = {char(0xFE), char(0xFF), char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         char16_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -621,7 +621,7 @@ int main()
         typedef std::codecvt_utf16<char16_t, 0x10ffff, std::little_endian> C;
         C c;
         char16_t w = 0;
-        char n[4] = {0xC0, 0xD8, 0x03, 0xDC};
+        char n[4] = {char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         char16_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -660,7 +660,7 @@ int main()
         typedef std::codecvt_utf16<char16_t, 0x1000, std::little_endian> C;
         C c;
         char16_t w = 0;
-        char n[4] = {0xC0, 0xD8, 0x03, 0xDC};
+        char n[4] = {char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         char16_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -701,7 +701,7 @@ int main()
                                                          std::little_endian)> C;
         C c;
         char16_t w = 0;
-        char n[6] = {0xFF, 0xFE, 0xC0, 0xD8, 0x03, 0xDC};
+        char n[6] = {char(0xFF), char(0xFE), char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         char16_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
diff --git a/test/localization/locale.stdcvt/codecvt_utf16_length.pass.cpp b/test/localization/locale.stdcvt/codecvt_utf16_length.pass.cpp
index 3ef5f194..6f82e8e4 100644
--- a/test/localization/locale.stdcvt/codecvt_utf16_length.pass.cpp
+++ b/test/localization/locale.stdcvt/codecvt_utf16_length.pass.cpp
@@ -28,7 +28,7 @@ int main()
     {
         typedef std::codecvt_utf16<wchar_t> C;
         C c;
-        char n[4] = {0xD8, 0xC0, 0xDC, 0x03};
+        char n[4] = {char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 4);
@@ -51,7 +51,7 @@ int main()
     {
         typedef std::codecvt_utf16<wchar_t, 0x1000> C;
         C c;
-        char n[4] = {0xD8, 0xC0, 0xDC, 0x03};
+        char n[4] = {char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 0);
@@ -74,7 +74,7 @@ int main()
     {
         typedef std::codecvt_utf16<wchar_t, 0x10ffff, std::consume_header> C;
         C c;
-        char n[6] = {0xFE, 0xFF, 0xD8, 0xC0, 0xDC, 0x03};
+        char n[6] = {char(0xFE), char(0xFF), char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         std::mbstate_t m;
         int r = c.length(m, n, n+6, 2);
         assert(r == 6);
@@ -97,7 +97,7 @@ int main()
     {
         typedef std::codecvt_utf16<wchar_t, 0x10ffff, std::little_endian> C;
         C c;
-        char n[4] = {0xC0, 0xD8, 0x03, 0xDC};
+        char n[4] = {char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 4);
@@ -120,7 +120,7 @@ int main()
     {
         typedef std::codecvt_utf16<wchar_t, 0x1000, std::little_endian> C;
         C c;
-        char n[4] = {0xC0, 0xD8, 0x03, 0xDC};
+        char n[4] = {char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 0);
@@ -145,7 +145,7 @@ int main()
                                                          std::consume_header |
                                                          std::little_endian)> C;
         C c;
-        char n[6] = {0xFF, 0xFE, 0xC0, 0xD8, 0x03, 0xDC};
+        char n[6] = {char(0xFF), char(0xFE), char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         std::mbstate_t m;
         int r = c.length(m, n, n+6, 2);
         assert(r == 6);
@@ -168,7 +168,7 @@ int main()
     {
         typedef std::codecvt_utf16<char32_t> C;
         C c;
-        char n[4] = {0xD8, 0xC0, 0xDC, 0x03};
+        char n[4] = {char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 4);
@@ -191,7 +191,7 @@ int main()
     {
         typedef std::codecvt_utf16<char32_t, 0x1000> C;
         C c;
-        char n[4] = {0xD8, 0xC0, 0xDC, 0x03};
+        char n[4] = {char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 0);
@@ -214,7 +214,7 @@ int main()
     {
         typedef std::codecvt_utf16<char32_t, 0x10ffff, std::consume_header> C;
         C c;
-        char n[6] = {0xFE, 0xFF, 0xD8, 0xC0, 0xDC, 0x03};
+        char n[6] = {char(0xFE), char(0xFF), char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         std::mbstate_t m;
         int r = c.length(m, n, n+6, 2);
         assert(r == 6);
@@ -237,7 +237,7 @@ int main()
     {
         typedef std::codecvt_utf16<char32_t, 0x10ffff, std::little_endian> C;
         C c;
-        char n[4] = {0xC0, 0xD8, 0x03, 0xDC};
+        char n[4] = {char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 4);
@@ -260,7 +260,7 @@ int main()
     {
         typedef std::codecvt_utf16<char32_t, 0x1000, std::little_endian> C;
         C c;
-        char n[4] = {0xC0, 0xD8, 0x03, 0xDC};
+        char n[4] = {char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 0);
@@ -285,7 +285,7 @@ int main()
                                                          std::consume_header |
                                                          std::little_endian)> C;
         C c;
-        char n[6] = {0xFF, 0xFE, 0xC0, 0xD8, 0x03, 0xDC};
+        char n[6] = {char(0xFF), char(0xFE), char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         std::mbstate_t m;
         int r = c.length(m, n, n+6, 2);
         assert(r == 6);
@@ -309,7 +309,7 @@ int main()
     {
         typedef std::codecvt_utf16<char16_t> C;
         C c;
-        char n[4] = {0xD8, 0xC0, 0xDC, 0x03};
+        char n[4] = {char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 0);
@@ -332,7 +332,7 @@ int main()
     {
         typedef std::codecvt_utf16<char16_t, 0x1000> C;
         C c;
-        char n[4] = {0xD8, 0xC0, 0xDC, 0x03};
+        char n[4] = {char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 0);
@@ -355,7 +355,7 @@ int main()
     {
         typedef std::codecvt_utf16<char16_t, 0x10ffff, std::consume_header> C;
         C c;
-        char n[6] = {0xFE, 0xFF, 0xD8, 0xC0, 0xDC, 0x03};
+        char n[6] = {char(0xFE), char(0xFF), char(0xD8), char(0xC0), char(0xDC), char(0x03)};
         std::mbstate_t m;
         int r = c.length(m, n, n+6, 2);
         assert(r == 2);
@@ -378,7 +378,7 @@ int main()
     {
         typedef std::codecvt_utf16<char16_t, 0x10ffff, std::little_endian> C;
         C c;
-        char n[4] = {0xC0, 0xD8, 0x03, 0xDC};
+        char n[4] = {char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 0);
@@ -401,7 +401,7 @@ int main()
     {
         typedef std::codecvt_utf16<char16_t, 0x1000, std::little_endian> C;
         C c;
-        char n[4] = {0xC0, 0xD8, 0x03, 0xDC};
+        char n[4] = {char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 0);
@@ -426,7 +426,7 @@ int main()
                                                          std::consume_header |
                                                          std::little_endian)> C;
         C c;
-        char n[6] = {0xFF, 0xFE, 0xC0, 0xD8, 0x03, 0xDC};
+        char n[6] = {char(0xFF), char(0xFE), char(0xC0), char(0xD8), char(0x03), char(0xDC)};
         std::mbstate_t m;
         int r = c.length(m, n, n+6, 2);
         assert(r == 2);
diff --git a/test/localization/locale.stdcvt/codecvt_utf8_in.pass.cpp b/test/localization/locale.stdcvt/codecvt_utf8_in.pass.cpp
index 8dd453ac..1247a840 100644
--- a/test/localization/locale.stdcvt/codecvt_utf8_in.pass.cpp
+++ b/test/localization/locale.stdcvt/codecvt_utf8_in.pass.cpp
@@ -31,7 +31,7 @@ int main()
         typedef std::codecvt_utf8<wchar_t> C;
         C c;
         wchar_t w = 0;
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         wchar_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -70,7 +70,7 @@ int main()
         typedef std::codecvt_utf8<wchar_t, 0x1000> C;
         C c;
         wchar_t w = 0;
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         wchar_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -109,7 +109,7 @@ int main()
         typedef std::codecvt_utf8<wchar_t, 0xFFFFFFFF, std::consume_header> C;
         C c;
         wchar_t w = 0;
-        char n[7] = {0xEF, 0xBB, 0xBF, 0xF1, 0x80, 0x80, 0x83};
+        char n[7] = {char(0xEF), char(0xBB), char(0xBF), char(0xF1), char(0x80), char(0x80), char(0x83)};
         wchar_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -151,7 +151,7 @@ int main()
         typedef std::codecvt_utf8<char32_t> C;
         C c;
         char32_t w = 0;
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         char32_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -190,7 +190,7 @@ int main()
         typedef std::codecvt_utf8<char32_t, 0x1000> C;
         C c;
         char32_t w = 0;
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         char32_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -229,7 +229,7 @@ int main()
         typedef std::codecvt_utf8<char32_t, 0xFFFFFFFF, std::consume_header> C;
         C c;
         char32_t w = 0;
-        char n[7] = {0xEF, 0xBB, 0xBF, 0xF1, 0x80, 0x80, 0x83};
+        char n[7] = {char(0xEF), char(0xBB), char(0xBF), char(0xF1), char(0x80), char(0x80), char(0x83)};
         char32_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -271,7 +271,7 @@ int main()
         typedef std::codecvt_utf8<char16_t> C;
         C c;
         char16_t w = 0;
-        char n[3] = {0xE1, 0x80, 0x85};
+        char n[3] = {char(0xE1), char(0x80), char(0x85)};
         char16_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -301,7 +301,7 @@ int main()
         typedef std::codecvt_utf8<char16_t, 0x1000> C;
         C c;
         char16_t w = 0;
-        char n[3] = {0xE1, 0x80, 0x85};
+        char n[3] = {char(0xE1), char(0x80), char(0x85)};
         char16_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -331,7 +331,7 @@ int main()
         typedef std::codecvt_utf8<char16_t, 0xFFFFFFFF, std::consume_header> C;
         C c;
         char16_t w = 0;
-        char n[6] = {0xEF, 0xBB, 0xBF, 0xE1, 0x80, 0x85};
+        char n[6] = {char(0xEF), char(0xBB), char(0xBF), char(0xE1), char(0x80), char(0x85)};
         char16_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
diff --git a/test/localization/locale.stdcvt/codecvt_utf8_length.pass.cpp b/test/localization/locale.stdcvt/codecvt_utf8_length.pass.cpp
index 2e44c13d..42d082d9 100644
--- a/test/localization/locale.stdcvt/codecvt_utf8_length.pass.cpp
+++ b/test/localization/locale.stdcvt/codecvt_utf8_length.pass.cpp
@@ -28,7 +28,7 @@ int main()
     {
         typedef std::codecvt_utf8<wchar_t> C;
         C c;
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 1);
         assert(r == 4);
@@ -51,7 +51,7 @@ int main()
     {
         typedef std::codecvt_utf8<wchar_t, 0x1000> C;
         C c;
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 1);
         assert(r == 0);
@@ -74,7 +74,7 @@ int main()
     {
         typedef std::codecvt_utf8<wchar_t, 0xFFFFFFFF, std::consume_header> C;
         C c;
-        char n[7] = {0xEF, 0xBB, 0xBF, 0xF1, 0x80, 0x80, 0x83};
+        char n[7] = {char(0xEF), char(0xBB), char(0xBF), char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+7, 1);
         assert(r == 7);
@@ -100,7 +100,7 @@ int main()
     {
         typedef std::codecvt_utf8<char32_t> C;
         C c;
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 1);
         assert(r == 4);
@@ -123,7 +123,7 @@ int main()
     {
         typedef std::codecvt_utf8<char32_t, 0x1000> C;
         C c;
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 1);
         assert(r == 0);
@@ -146,7 +146,7 @@ int main()
     {
         typedef std::codecvt_utf8<char32_t, 0xFFFFFFFF, std::consume_header> C;
         C c;
-        char n[7] = {0xEF, 0xBB, 0xBF, 0xF1, 0x80, 0x80, 0x83};
+        char n[7] = {char(0xEF), char(0xBB), char(0xBF), char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+7, 1);
         assert(r == 7);
@@ -172,7 +172,7 @@ int main()
     {
         typedef std::codecvt_utf8<char16_t> C;
         C c;
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 1);
         assert(r == 0);
@@ -195,7 +195,7 @@ int main()
     {
         typedef std::codecvt_utf8<char16_t, 0x1000> C;
         C c;
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 1);
         assert(r == 0);
@@ -218,7 +218,7 @@ int main()
     {
         typedef std::codecvt_utf8<char16_t, 0xFFFFFFFF, std::consume_header> C;
         C c;
-        char n[7] = {0xEF, 0xBB, 0xBF, 0xF1, 0x80, 0x80, 0x83};
+        char n[7] = {char(0xEF), char(0xBB), char(0xBF), char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+7, 1);
         assert(r == 3);
diff --git a/test/localization/locale.stdcvt/codecvt_utf8_utf16_in.pass.cpp b/test/localization/locale.stdcvt/codecvt_utf8_utf16_in.pass.cpp
index 4427ece2..5cc4e6b8 100644
--- a/test/localization/locale.stdcvt/codecvt_utf8_utf16_in.pass.cpp
+++ b/test/localization/locale.stdcvt/codecvt_utf8_utf16_in.pass.cpp
@@ -31,7 +31,7 @@ int main()
         typedef std::codecvt_utf8_utf16<wchar_t> C;
         C c;
         wchar_t w[2] = {0};
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         wchar_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -70,7 +70,7 @@ int main()
         typedef std::codecvt_utf8_utf16<wchar_t, 0x1000> C;
         C c;
         wchar_t w[2] = {0};
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         wchar_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -106,7 +106,7 @@ int main()
         typedef std::codecvt_utf8_utf16<wchar_t, 0x10ffff, std::consume_header> C;
         C c;
         wchar_t w[2] = {0};
-        char n[7] = {0xEF, 0xBB, 0xBF, 0xF1, 0x80, 0x80, 0x83};
+        char n[7] = {char(0xEF), char(0xBB), char(0xBF), char(0xF1), char(0x80), char(0x80), char(0x83)};
         wchar_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -145,7 +145,7 @@ int main()
         typedef std::codecvt_utf8_utf16<char32_t> C;
         C c;
         char32_t w[2] = {0};
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         char32_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -184,7 +184,7 @@ int main()
         typedef std::codecvt_utf8_utf16<char32_t, 0x1000> C;
         C c;
         char32_t w[2] = {0};
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         char32_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -220,7 +220,7 @@ int main()
         typedef std::codecvt_utf8_utf16<char32_t, 0x10ffff, std::consume_header> C;
         C c;
         char32_t w[2] = {0};
-        char n[7] = {0xEF, 0xBB, 0xBF, 0xF1, 0x80, 0x80, 0x83};
+        char n[7] = {char(0xEF), char(0xBB), char(0xBF), char(0xF1), char(0x80), char(0x80), char(0x83)};
         char32_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -259,7 +259,7 @@ int main()
         typedef std::codecvt_utf8_utf16<char16_t> C;
         C c;
         char16_t w[2] = {0};
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         char16_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -298,7 +298,7 @@ int main()
         typedef std::codecvt_utf8_utf16<char16_t, 0x1000> C;
         C c;
         char16_t w[2] = {0};
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         char16_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
@@ -334,7 +334,7 @@ int main()
         typedef std::codecvt_utf8_utf16<char16_t, 0x10ffff, std::consume_header> C;
         C c;
         char16_t w[2] = {0};
-        char n[7] = {0xEF, 0xBB, 0xBF, 0xF1, 0x80, 0x80, 0x83};
+        char n[7] = {char(0xEF), char(0xBB), char(0xBF), char(0xF1), char(0x80), char(0x80), char(0x83)};
         char16_t* wp = nullptr;
         std::mbstate_t m;
         const char* np = nullptr;
diff --git a/test/localization/locale.stdcvt/codecvt_utf8_utf16_length.pass.cpp b/test/localization/locale.stdcvt/codecvt_utf8_utf16_length.pass.cpp
index f7651fb3..e22168b7 100644
--- a/test/localization/locale.stdcvt/codecvt_utf8_utf16_length.pass.cpp
+++ b/test/localization/locale.stdcvt/codecvt_utf8_utf16_length.pass.cpp
@@ -28,7 +28,7 @@ int main()
     {
         typedef std::codecvt_utf8_utf16<wchar_t> C;
         C c;
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 4);
@@ -51,7 +51,7 @@ int main()
     {
         typedef std::codecvt_utf8_utf16<wchar_t, 0x1000> C;
         C c;
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 0);
@@ -74,7 +74,7 @@ int main()
     {
         typedef std::codecvt_utf8_utf16<wchar_t, 0x10ffff, std::consume_header> C;
         C c;
-        char n[7] = {0xEF, 0xBB, 0xBF, 0xF1, 0x80, 0x80, 0x83};
+        char n[7] = {char(0xEF), char(0xBB), char(0xBF), char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+7, 2);
         assert(r == 7);
@@ -97,7 +97,7 @@ int main()
     {
         typedef std::codecvt_utf8_utf16<char32_t> C;
         C c;
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 4);
@@ -120,7 +120,7 @@ int main()
     {
         typedef std::codecvt_utf8_utf16<char32_t, 0x1000> C;
         C c;
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 0);
@@ -143,7 +143,7 @@ int main()
     {
         typedef std::codecvt_utf8_utf16<char32_t, 0x10ffff, std::consume_header> C;
         C c;
-        char n[7] = {0xEF, 0xBB, 0xBF, 0xF1, 0x80, 0x80, 0x83};
+        char n[7] = {char(0xEF), char(0xBB), char(0xBF), char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+7, 2);
         assert(r == 7);
@@ -166,7 +166,7 @@ int main()
     {
         typedef std::codecvt_utf8_utf16<char16_t> C;
         C c;
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 4);
@@ -189,7 +189,7 @@ int main()
     {
         typedef std::codecvt_utf8_utf16<char16_t, 0x1000> C;
         C c;
-        char n[4] = {0xF1, 0x80, 0x80, 0x83};
+        char n[4] = {char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+4, 2);
         assert(r == 0);
@@ -212,7 +212,7 @@ int main()
     {
         typedef std::codecvt_utf8_utf16<char16_t, 0x10ffff, std::consume_header> C;
         C c;
-        char n[7] = {0xEF, 0xBB, 0xBF, 0xF1, 0x80, 0x80, 0x83};
+        char n[7] = {char(0xEF), char(0xBB), char(0xBF), char(0xF1), char(0x80), char(0x80), char(0x83)};
         std::mbstate_t m;
         int r = c.length(m, n, n+7, 2);
         assert(r == 7);