diff -Nru ryu-4.15/debian/changelog ryu-4.15/debian/changelog
--- ryu-4.15/debian/changelog	2017-08-04 20:47:51.000000000 +0000
+++ ryu-4.15/debian/changelog	2018-04-11 20:03:14.000000000 +0000
@@ -1,3 +1,11 @@
+ryu (4.15-0ubuntu2) bionic; urgency=medium
+
+  * d/p/test_rpc-Adopt-to-msgpack-python-0.50.patch: Cherry-picked from
+    upstream to fix test failure "test_0_call_bytearray() did not raise
+    TypeError".
+
+ -- Corey Bryant <corey.bryant@canonical.com>  Wed, 11 Apr 2018 16:03:14 -0400
+
 ryu (4.15-0ubuntu1) artful; urgency=medium
 
   * New upstream release.
diff -Nru ryu-4.15/debian/patches/series ryu-4.15/debian/patches/series
--- ryu-4.15/debian/patches/series	2017-08-04 20:47:51.000000000 +0000
+++ ryu-4.15/debian/patches/series	2018-04-11 20:03:14.000000000 +0000
@@ -1 +1,2 @@
 no-pip.patch
+test_rpc-Adopt-to-msgpack-python-0.50.patch
diff -Nru ryu-4.15/debian/patches/test_rpc-Adopt-to-msgpack-python-0.50.patch ryu-4.15/debian/patches/test_rpc-Adopt-to-msgpack-python-0.50.patch
--- ryu-4.15/debian/patches/test_rpc-Adopt-to-msgpack-python-0.50.patch	1970-01-01 00:00:00.000000000 +0000
+++ ryu-4.15/debian/patches/test_rpc-Adopt-to-msgpack-python-0.50.patch	2018-04-11 20:03:14.000000000 +0000
@@ -0,0 +1,44 @@
+From 81cdd4f0d76952c16d6e65e6af8da82702175220 Mon Sep 17 00:00:00 2001
+From: IWASE Yusuke <iwase.yusuke0@gmail.com>
+Date: Thu, 11 Jan 2018 16:02:40 +0900
+Subject: [PATCH] test_rpc: Adopt to msgpack-python>=0.50
+
+msgpack-python version 0.50 or later supports bytearray objects, this
+patch fixes to adopt to this change.
+
+Signed-off-by: IWASE Yusuke <iwase.yusuke0@gmail.com>
+Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
+---
+ ryu/tests/unit/lib/test_rpc.py | 13 +++++++++----
+ 1 file changed, 9 insertions(+), 4 deletions(-)
+
+diff --git a/ryu/tests/unit/lib/test_rpc.py b/ryu/tests/unit/lib/test_rpc.py
+index 2df123ee..4fba5068 100644
+--- a/ryu/tests/unit/lib/test_rpc.py
++++ b/ryu/tests/unit/lib/test_rpc.py
+@@ -138,13 +138,18 @@ class Test_rpc(unittest.TestCase):
+         assert result == obj
+         assert isinstance(result, numbers.Integral)
+ 
+-    @raises(TypeError)
+     def test_0_call_bytearray(self):
+         c = rpc.Client(self._client_sock)
+         obj = bytearray(b'foo')
+-        result = c.call('resp', [obj])
+-        assert result == obj
+-        assert isinstance(result, str)
++        # Note: msgpack-python version 0.50 or later supports bytearray
++        # objects, here ignores TypeError for the backward compatibility.
++        try:
++            result = c.call('resp', [obj])
++        except TypeError:
++            # Case with msgpack-python version 0.4.x or earlier.
++            return
++        self.assertEqual(obj, result)
++        self.assertIsInstance(result, six.binary_type)
+ 
+     def test_1_shutdown_wr(self):
+         # test if the server shutdown on disconnect
+-- 
+2.15.1
+