diff --git a/test/CommonMakefile.in b/test/CommonMakefile.in
index 52ad088060..24b3cd474a 100644
--- a/test/CommonMakefile.in
+++ b/test/CommonMakefile.in
@@ -103,6 +103,7 @@ TARGETS_IUTEST_ONLY = \
           iutest_filter_file_syntax_tests \
           iutest_filter_file_tests \
           iutest_ostream_formatter_tests \
+          iutest_output_tests \
           iutest_output_xml_invalid_path_tests \
           iutest_tap_file_generator_listener_tests \
           iutest_tap_printer_listener_tests \
diff --git a/test/iutest_output_tests.cpp b/test/iutest_output_tests.cpp
new file mode 100644
index 0000000000..2b72365f07
--- /dev/null
+++ b/test/iutest_output_tests.cpp
@@ -0,0 +1,52 @@
+//======================================================================
+//-----------------------------------------------------------------------
+/**
+ * @file		iutest_output_tests.cpp
+ * @brief		出力テスト
+ *
+ * @author		t.shirayanagi
+ * @par			copyright
+ * Copyright (C) 2015, Takazumi Shirayanagi\n
+ * This software is released under the new BSD License,
+ * see LICENSE
+*/
+//-----------------------------------------------------------------------
+//======================================================================
+
+//======================================================================
+// include
+#include "iutest.hpp"
+#include "internal/iutest_log_stream.hpp"
+#include "iutest_logger_tests.hpp"
+
+TestLogger logger;
+
+IUTEST(LoggerTest, Output)
+{
+	logger.clear();
+	logger.output("%d", 1);
+	
+	IUTEST_EXPECT_STREQ("1", logger.c_str());
+}
+
+IUTEST(LogStreamTest, Write)
+{
+	logger.clear();
+	::iutest::detail::LogStream stream;
+	const char text[] = "test text";
+	stream.Write(text, sizeof(text), 1);
+	
+	IUTEST_EXPECT_STREQ(text, logger.c_str());
+}
+
+#ifdef UNICODE
+int wmain(int argc, wchar_t* argv[])
+#else
+int main(int argc, char* argv[])
+#endif
+{
+	::iutest::detail::iuConsole::SetLogger(&logger);
+	IUTEST_INIT(&argc, argv);
+	return IUTEST_RUN_ALL_TESTS();
+}
+
diff --git a/test/iutest_printers_tests.cpp b/test/iutest_printers_tests.cpp
index 46214ac933..28dbfd47f0 100644
--- a/test/iutest_printers_tests.cpp
+++ b/test/iutest_printers_tests.cpp
@@ -83,6 +83,22 @@ IUTEST(PrintToTest, Bar)
 	IUTEST_SUCCEED() << ::iutest::PrintToString(bar);
 }
 
+struct BigVar
+{
+	int big[10];
+	operator ::iutest::BiggestInt () const
+	{
+		return 42;
+	}
+};
+
+IUTEST(PrintToTest, BigVar)
+{
+	BigVar bigvar;
+	LogChecker ck("42");
+	IUTEST_SUCCEED() << ::iutest::PrintToString(bigvar);
+}
+
 #if IUTEST_HAS_TYPED_TEST
 
 template<typename T>