diff --git a/test/core-mm/streams.cpp b/test/core-mm/streams.cpp
new file mode 100644
index 0000000..697358a
--- /dev/null
+++ b/test/core-mm/streams.cpp
@@ -0,0 +1,18 @@
+#include <blue/core/stream.hpp>
+#include <blue/core/stringstream.hpp>
+#include <iostream>
+
+using namespace blue::core;
+
+int main(void)
+{
+	stream &out = stream::out();
+	out.write_fmt("Hello, %d\n", 32);
+
+	stringstream s;
+	s.write_fmt("Hello, %d\n", 64);
+
+	std::cout << s.get_ptr();
+
+	return 0;
+}