Skip failing test on Python 3.4

tests/test_run_app.py

@@ -1,6 +1,7 @@
 import asyncio
 import pytest
 import ssl
+import sys
 
 from unittest import mock
 from aiohttp import web
@@ -56,7 +57,10 @@ def test_run_app_nondefault_host_port(loop, unused_port):
     loop.create_server.assert_called_with(mock.ANY, host, port, ssl=None)
 
 
+@pytest.mark.skipIf(sys.version_info < (3, 5))
 def test_run_app_default_eventloop(loop, unused_port):
+    # Python 3.4 fails on running in debug mode if loop is wrapped by mock
+
     loop = mock.Mock(spec=asyncio.AbstractEventLoop, wrap=loop)
 
     asyncio.set_event_loop(loop)