diff --git a/test/std/input.output/iostream.format/ext.manip/put_time.pass.cpp b/test/std/input.output/iostream.format/ext.manip/put_time.pass.cpp
index d0326c551..d12b91cc0 100644
--- a/test/std/input.output/iostream.format/ext.manip/put_time.pass.cpp
+++ b/test/std/input.output/iostream.format/ext.manip/put_time.pass.cpp
@@ -40,7 +40,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/input.streams/istream.unformatted/get_streambuf.pass.cpp b/test/std/input.output/iostream.format/input.streams/istream.unformatted/get_streambuf.pass.cpp
index 1b614d3ac..e7327293b 100644
--- a/test/std/input.output/iostream.format/input.streams/istream.unformatted/get_streambuf.pass.cpp
+++ b/test/std/input.output/iostream.format/input.streams/istream.unformatted/get_streambuf.pass.cpp
@@ -43,7 +43,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/input.streams/istream.unformatted/get_streambuf_chart.pass.cpp b/test/std/input.output/iostream.format/input.streams/istream.unformatted/get_streambuf_chart.pass.cpp
index b4e5efc5d..292cf7c3b 100644
--- a/test/std/input.output/iostream.format/input.streams/istream.unformatted/get_streambuf_chart.pass.cpp
+++ b/test/std/input.output/iostream.format/input.streams/istream.unformatted/get_streambuf_chart.pass.cpp
@@ -44,7 +44,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/bool.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/bool.pass.cpp
index b7a18280d..fe038a7cc 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/bool.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/bool.pass.cpp
@@ -39,7 +39,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/double.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/double.pass.cpp
index a750b74b0..197e4602f 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/double.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/double.pass.cpp
@@ -39,7 +39,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/float.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/float.pass.cpp
index c2b837506..d31da5a18 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/float.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/float.pass.cpp
@@ -39,7 +39,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/int.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/int.pass.cpp
index 26e614700..1b33280e6 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/int.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/int.pass.cpp
@@ -39,7 +39,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/long.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/long.pass.cpp
index 4eb0c17d0..7cf46096d 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/long.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/long.pass.cpp
@@ -39,7 +39,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/long_double.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/long_double.pass.cpp
index 3fc2d07ef..dba3f8a68 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/long_double.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/long_double.pass.cpp
@@ -39,7 +39,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/long_long.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/long_long.pass.cpp
index 9ccfed3d3..1174a0934 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/long_long.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/long_long.pass.cpp
@@ -39,7 +39,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/pointer.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/pointer.pass.cpp
index 122bb83ab..f6589397e 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/pointer.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/pointer.pass.cpp
@@ -39,7 +39,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/short.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/short.pass.cpp
index f5c84f616..3b8182c1b 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/short.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/short.pass.cpp
@@ -39,7 +39,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/unsigned_int.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/unsigned_int.pass.cpp
index bc74e6bb9..61057f7b3 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/unsigned_int.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/unsigned_int.pass.cpp
@@ -39,7 +39,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/unsigned_long.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/unsigned_long.pass.cpp
index 6b3fd5bf5..4558993e8 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/unsigned_long.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/unsigned_long.pass.cpp
@@ -39,7 +39,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/unsigned_long_long.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/unsigned_long_long.pass.cpp
index af2911ea3..1727b3657 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/unsigned_long_long.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/unsigned_long_long.pass.cpp
@@ -39,7 +39,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/unsigned_short.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/unsigned_short.pass.cpp
index 5a224b6b8..a42cd5628 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/unsigned_short.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.arithmetic/unsigned_short.pass.cpp
@@ -39,7 +39,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/char.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/char.pass.cpp
index 3e89fff55..91ee08cd0 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/char.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/char.pass.cpp
@@ -40,7 +40,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/char_pointer.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/char_pointer.pass.cpp
index 065a3403b..1eb48d378 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/char_pointer.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/char_pointer.pass.cpp
@@ -40,7 +40,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/signed_char.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/signed_char.pass.cpp
index b590aceaf..d57d0e707 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/signed_char.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/signed_char.pass.cpp
@@ -40,7 +40,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/signed_char_pointer.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/signed_char_pointer.pass.cpp
index 96239ada3..e51e88157 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/signed_char_pointer.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/signed_char_pointer.pass.cpp
@@ -40,7 +40,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/unsigned_char.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/unsigned_char.pass.cpp
index 2be77a36d..9956f3b01 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/unsigned_char.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/unsigned_char.pass.cpp
@@ -40,7 +40,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/unsigned_char_pointer.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/unsigned_char_pointer.pass.cpp
index 190b735a9..d87e733c0 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/unsigned_char_pointer.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters.character/unsigned_char_pointer.pass.cpp
@@ -40,7 +40,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters/basic_ios.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters/basic_ios.pass.cpp
index f57ad09da..ef7e292e9 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters/basic_ios.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters/basic_ios.pass.cpp
@@ -40,7 +40,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters/ios_base.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters/ios_base.pass.cpp
index 4ecd0cd3a..933e01c66 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters/ios_base.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters/ios_base.pass.cpp
@@ -39,7 +39,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters/ostream.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters/ostream.pass.cpp
index f7682829f..5c0604b73 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters/ostream.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters/ostream.pass.cpp
@@ -40,7 +40,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters/streambuf.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters/streambuf.pass.cpp
index 5209494dd..a26450ae5 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters/streambuf.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.formatted/ostream.inserters/streambuf.pass.cpp
@@ -46,7 +46,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.manip/endl.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.manip/endl.pass.cpp
index 1a3a80a36..72df60855 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.manip/endl.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.manip/endl.pass.cpp
@@ -42,7 +42,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.manip/ends.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.manip/ends.pass.cpp
index 8e39bb479..dcded3434 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.manip/ends.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.manip/ends.pass.cpp
@@ -40,7 +40,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.rvalue/CharT_pointer.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.rvalue/CharT_pointer.pass.cpp
index 34be3dbc8..8be0b51d9 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.rvalue/CharT_pointer.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.rvalue/CharT_pointer.pass.cpp
@@ -43,7 +43,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.unformatted/put.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.unformatted/put.pass.cpp
index 19a98c236..0958f8330 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.unformatted/put.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.unformatted/put.pass.cpp
@@ -39,7 +39,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));
diff --git a/test/std/input.output/iostream.format/output.streams/ostream.unformatted/write.pass.cpp b/test/std/input.output/iostream.format/output.streams/ostream.unformatted/write.pass.cpp
index 2bf040248..0d6eb3f22 100644
--- a/test/std/input.output/iostream.format/output.streams/ostream.unformatted/write.pass.cpp
+++ b/test/std/input.output/iostream.format/output.streams/ostream.unformatted/write.pass.cpp
@@ -39,7 +39,7 @@ protected:
             if (__c != base::traits_type::eof())
             {
                 int n = static_cast<int>(str_.size());
-                str_.push_back(__c);
+                str_.push_back(static_cast<CharT>(__c));
                 str_.resize(str_.capacity());
                 base::setp(const_cast<CharT*>(str_.data()),
                            const_cast<CharT*>(str_.data() + str_.size()));