diff --git a/tests/CMakeLists.txt b/tests/CMakeLists.txt
index 153067e..600f6f8 100644
--- a/tests/CMakeLists.txt
+++ b/tests/CMakeLists.txt
@@ -49,6 +49,7 @@ add_executable( all_tests all_tests.cpp
                           io/json_tests.cpp
                           io/stream_tests.cpp
                           io/tcp_test.cpp
+                          io/varint_tests.cpp
                           network/http/websocket_test.cpp
                           thread/task_cancel.cpp
                           thread/thread_tests.cpp
diff --git a/tests/io/varint_tests.cpp b/tests/io/varint_tests.cpp
new file mode 100644
index 0000000..4309d0f
--- /dev/null
+++ b/tests/io/varint_tests.cpp
@@ -0,0 +1,53 @@
+#include <boost/test/unit_test.hpp>
+
+#include <fc/io/json.hpp>
+#include <fc/io/raw.hpp>
+#include <fc/io/varint.hpp>
+
+BOOST_AUTO_TEST_SUITE(varint_tests)
+
+#define UINT_LENGTH (1 + 1 + 1 + 1 + 1 + 1 + 2 + 2 + 2 + 3 + 3 + 3 + 4 + 4 + 4 + 5 + 5)
+static const std::string EXPECTED_UINTS( "\020" // 16 = length of array
+                                         "\0\1\2\020\177\200\1\200\2\377\177"
+                                         "\200\200\1\200\200\2\377\377\177"
+                                         "\200\200\200\1\200\200\200\2"
+                                         "\377\377\377\177\200\200\200\200\1"
+                                         "\252\325\252\325\012", UINT_LENGTH );
+static const std::vector<fc::unsigned_int> TEST_U = {
+                                                 0, // \0
+                                                 1, // \1
+                                                 2, // \2
+                                              0x10, // \020
+                                              0x7f, // \177
+                                              0x80, // \200\1
+                                             0x100, // \200\2
+                                            0x3fff, // \377\177
+                                            0x4000, // \200\200\1
+                                            0x8000, // \200\200\2
+                                          0x1fffff, // \377\377\177
+                                          0x200000, // \200\200\200\1
+                                          0x400000, // \200\200\200\2
+                                         0xfffffff, // \377\377\377\177
+                                        0x10000000, // \200\200\200\200\1
+                                        0xaaaaaaaa  // \252\325\252\325\012
+   };
+BOOST_AUTO_TEST_CASE( test_unsigned )
+{
+   const std::vector<char> packed_u = fc::raw::pack<std::vector<fc::unsigned_int>>( TEST_U, 3 );
+   BOOST_CHECK_EQUAL( UINT_LENGTH, packed_u.size() );
+   BOOST_CHECK_EQUAL( EXPECTED_UINTS, std::string( packed_u.data(), packed_u.size() ) );
+   std::vector<fc::unsigned_int> unpacked_u;
+   fc::raw::unpack<std::vector<fc::unsigned_int>>( packed_u, unpacked_u, 3 );
+   BOOST_CHECK_EQUAL( TEST_U.size(), unpacked_u.size() );
+   for( size_t i = 0; i < TEST_U.size(); i++ )
+      BOOST_CHECK_EQUAL( TEST_U[i].value, unpacked_u[i].value );
+
+   const std::string json_u = fc::json::to_string(fc::variant( TEST_U, 3 ));
+   BOOST_CHECK_EQUAL( "[0,1,2,16,127,128,256,16383,16384,32768,2097151,2097152,4194304,268435455,268435456,2863311530]", json_u );
+   std::vector<fc::unsigned_int> unjson_u = fc::json::from_string( json_u ).as<std::vector<fc::unsigned_int>>( 3 );
+   BOOST_CHECK_EQUAL( TEST_U.size(), unjson_u.size() );
+   for( size_t i = 0; i < TEST_U.size(); i++ )
+      BOOST_CHECK_EQUAL( TEST_U[i].value, unjson_u[i].value );
+}
+
+BOOST_AUTO_TEST_SUITE_END()