diff --git a/python/spdylay_tests.py b/python/spdylay_tests.py
new file mode 100644
index 00000000..1b63248e
--- /dev/null
+++ b/python/spdylay_tests.py
@@ -0,0 +1,267 @@
+#!/usr/bin/env python
+
+import unittest
+import io
+import collections
+
+import spdylay
+
+class BufferList:
+    def __init__(self):
+        self.buffers = collections.deque()
+
+    def add_buffer(self, bytebuf):
+        self.buffers.append(bytebuf)
+
+    def get_bytes(self, length):
+        while self.buffers:
+            first = self.buffers[0]
+            data = first.read(length)
+            if data:
+                return data
+            else:
+                self.buffers.popleft()
+        return None
+
+class IOBridge:
+    def __init__(self, inputs, outputs):
+        self.inputs = inputs
+        self.outputs = outputs
+
+class Streams:
+    def __init__(self, iob):
+        self.iob = iob
+        self.streams = {}
+        self.recv_frames = []
+        self.recv_data = io.BytesIO()
+
+def recv_cb(session, length):
+    iob = session.user_data.iob
+    return iob.inputs.get_bytes(length)
+
+def send_cb(session, data):
+    iob = session.user_data.iob
+    iob.outputs.add_buffer(io.BytesIO(data))
+    return len(data)
+
+def read_cb(session, stream_id, length, source):
+    return source.read(length)
+
+def on_data_chunk_recv_cb(session, flags, stream_id, data):
+    session.user_data.recv_data.write(data)
+
+def on_ctrl_recv_cb(session, frame):
+    session.user_data.recv_frames.append(frame)
+
+class SpdylayTests(unittest.TestCase):
+
+    def setUp(self):
+        client_output = BufferList()
+        server_output = BufferList()
+
+        client_iob = IOBridge(server_output, client_output)
+        server_iob = IOBridge(client_output, server_output)
+
+        self.client_streams = Streams(client_iob)
+        self.server_streams = Streams(server_iob)
+
+        self.client_session = spdylay.Session(\
+            spdylay.CLIENT,
+            spdylay.PROTO_SPDY3,
+            user_data=self.client_streams,
+            recv_cb=recv_cb,
+            send_cb=send_cb,
+            on_ctrl_recv_cb=on_ctrl_recv_cb,
+            on_data_chunk_recv_cb=on_data_chunk_recv_cb)
+
+        self.server_session = spdylay.Session(\
+            spdylay.SERVER,
+            spdylay.PROTO_SPDY3,
+            user_data=self.server_streams,
+            recv_cb=recv_cb,
+            send_cb=send_cb,
+            on_ctrl_recv_cb=on_ctrl_recv_cb,
+            on_data_chunk_recv_cb=on_data_chunk_recv_cb)
+
+    def test_submit_request_and_response(self):
+        data_prd = spdylay.DataProvider(io.BytesIO(b'Hello World'), read_cb)
+        self.client_session.submit_request(0, [(b':method', b'POST')],
+                                           data_prd=data_prd,
+                                           stream_user_data=data_prd)
+        self.client_session.send()
+        self.server_session.recv()
+
+        self.assertEqual(1, len(self.server_streams.recv_frames))
+        frame = self.server_streams.recv_frames[0]
+        self.assertEqual(spdylay.SYN_STREAM, frame.frame_type)
+        self.assertEqual(1, frame.stream_id)
+        self.assertEqual(0, frame.assoc_stream_id)
+        self.assertEqual(0, frame.pri)
+        self.assertEqual((b':method', b'POST'), frame.nv[0])
+
+        self.assertEqual(b'Hello World',
+                         self.server_streams.recv_data.getvalue())
+
+        self.assertEqual(data_prd, self.client_session.get_stream_user_data(1))
+
+        data_prd = spdylay.DataProvider(io.BytesIO(b'Foo the bar'), read_cb)
+        self.server_session.submit_response(1, [(b':status', b'200 OK')],
+                                            data_prd=data_prd)
+        self.server_session.send()
+        self.client_session.recv()
+
+        self.assertEqual(1, len(self.client_streams.recv_frames))
+        frame = self.client_streams.recv_frames[0]
+        self.assertEqual(spdylay.SYN_REPLY, frame.frame_type)
+        self.assertEqual(1, frame.stream_id)
+        self.assertEqual((b':status', b'200 OK'), frame.nv[0])
+
+        self.assertEqual(b'Foo the bar',
+                         self.client_streams.recv_data.getvalue())
+
+    def test_submit_syn_stream_and_syn_stream(self):
+        self.client_session.submit_syn_stream(spdylay.CTRL_FLAG_FIN, 0, 2,
+                                              [(b':path', b'/')], None);
+        self.client_session.send();
+        self.server_session.recv();
+
+        self.assertEqual(1, len(self.server_streams.recv_frames))
+        frame = self.server_streams.recv_frames[0]
+        self.assertEqual(spdylay.SYN_STREAM, frame.frame_type)
+        self.assertEqual(1, frame.stream_id)
+        self.assertEqual(0, frame.assoc_stream_id)
+        self.assertEqual(2, frame.pri)
+        self.assertEqual((b':path', b'/'), frame.nv[0])
+
+        self.server_session.submit_syn_reply(spdylay.CTRL_FLAG_FIN, 1,
+                                             [(b':version', b'HTTP/1.1')])
+        self.server_session.send();
+        self.client_session.recv();
+
+        self.assertEqual(1, len(self.client_streams.recv_frames))
+        frame = self.client_streams.recv_frames[0]
+        self.assertEqual(spdylay.SYN_REPLY, frame.frame_type)
+        self.assertEqual(1, frame.stream_id)
+        self.assertEqual((b':version', b'HTTP/1.1'), frame.nv[0])
+
+    def test_submit_rst_stream(self):
+        self.client_session.submit_syn_stream(spdylay.CTRL_FLAG_FIN, 0, 2,
+                                              [(b':path', b'/')], None);
+        self.client_session.send();
+        self.server_session.recv();
+
+        self.server_session.submit_rst_stream(1, spdylay.PROTOCOL_ERROR)
+        self.server_session.send();
+        self.client_session.recv();
+
+        self.assertEqual(1, len(self.client_streams.recv_frames))
+        frame = self.client_streams.recv_frames[0]
+        self.assertEqual(spdylay.RST_STREAM, frame.frame_type)
+        self.assertEqual(1, frame.stream_id)
+        self.assertEqual(spdylay.PROTOCOL_ERROR, frame.status_code)
+
+    def test_submit_goaway(self):
+        self.client_session.submit_goaway(spdylay.GOAWAY_PROTOCOL_ERROR)
+        self.client_session.send();
+        self.server_session.recv();
+
+        self.assertEqual(1, len(self.server_streams.recv_frames))
+        frame = self.server_streams.recv_frames[0]
+        self.assertEqual(spdylay.GOAWAY, frame.frame_type)
+        self.assertEqual(spdylay.GOAWAY_PROTOCOL_ERROR, frame.status_code)
+
+    def test_resume_data(self):
+        with self.assertRaises(spdylay.InvalidArgumentError):
+            self.client_session.resume_data(1)
+
+    def test_get_pri_lowest(self):
+        self.assertEqual(7, self.client_session.get_pri_lowest())
+
+    def test_fail_session(self):
+        self.client_session.fail_session(spdylay.GOAWAY_PROTOCOL_ERROR)
+        self.client_session.send();
+        self.server_session.recv();
+
+        self.assertEqual(1, len(self.server_streams.recv_frames))
+        frame = self.server_streams.recv_frames[0]
+        self.assertEqual(spdylay.GOAWAY, frame.frame_type)
+        self.assertEqual(spdylay.GOAWAY_PROTOCOL_ERROR, frame.status_code)
+
+        self.assertFalse(self.client_session.want_read())
+        self.assertFalse(self.client_session.want_write())
+
+    def test_deferred_data(self):
+        def deferred_read_cb(session, stream_id, length, source):
+            return spdylay.ERR_DEFERRED
+
+        data_prd = spdylay.DataProvider(io.BytesIO(b'Hello World'),
+                                        deferred_read_cb)
+        self.client_session.submit_request(0, [(b':method', b'POST')],
+                                           data_prd=data_prd,
+                                           stream_user_data=data_prd)
+        self.client_session.send()
+        self.server_session.recv()
+
+        self.assertEqual(1, len(self.server_streams.recv_frames))
+        frame = self.server_streams.recv_frames[0]
+        self.assertEqual(spdylay.SYN_STREAM, frame.frame_type)
+        self.assertEqual(1, frame.stream_id)
+        self.assertEqual(0, frame.assoc_stream_id)
+        self.assertEqual(0, frame.pri)
+        self.assertEqual((b':method', b'POST'), frame.nv[0])
+
+        self.assertEqual(b'', self.server_streams.recv_data.getvalue())
+
+        data_prd.read_cb = read_cb
+
+        self.client_session.resume_data(1)
+
+        self.client_session.send()
+        self.server_session.recv()
+
+        self.assertEqual(b'Hello World',
+                         self.server_streams.recv_data.getvalue())
+
+    def test_recv_cb_eof(self):
+        def eof_recv_cb(session, length):
+            raise spdylay.EOFError()
+
+        self.client_session = spdylay.Session(\
+            spdylay.CLIENT,
+            spdylay.PROTO_SPDY3,
+            user_data=self.client_streams,
+            recv_cb=eof_recv_cb)
+
+        with self.assertRaises(spdylay.EOFError):
+            self.client_session.recv()
+
+    def test_recv_cb_callback_failure(self):
+        def cbfail_recv_cb(session, length):
+            raise spdylay.CallbackFailureError()
+
+        self.client_session = spdylay.Session(\
+            spdylay.CLIENT,
+            spdylay.PROTO_SPDY3,
+            user_data=self.client_streams,
+            recv_cb=cbfail_recv_cb)
+
+        with self.assertRaises(spdylay.CallbackFailureError):
+            self.client_session.recv()
+
+    def test_send_cb_callback_failure(self):
+        def cbfail_send_cb(session, data):
+            raise spdylay.CallbackFailureError()
+
+        self.client_session = spdylay.Session(\
+            spdylay.CLIENT,
+            spdylay.PROTO_SPDY3,
+            user_data=self.client_streams,
+            send_cb=cbfail_send_cb)
+
+        self.client_session.submit_goaway(spdylay.GOAWAY_OK)
+
+        with self.assertRaises(spdylay.CallbackFailureError):
+            self.client_session.send()
+
+if __name__ == '__main__':
+    unittest.main()