diff --git a/tests/test_dns.py b/tests/test_dns.py
deleted file mode 100644
index 90bd34be34..0000000000
--- a/tests/test_dns.py
+++ /dev/null
@@ -1,129 +0,0 @@
-# -*- coding: utf-8 -*-
-# Copyright 2014-2016 OpenMarket Ltd
-#
-# Licensed under the Apache License, Version 2.0 (the "License");
-# you may not use this file except in compliance with the License.
-# You may obtain a copy of the License at
-#
-# http://www.apache.org/licenses/LICENSE-2.0
-#
-# Unless required by applicable law or agreed to in writing, software
-# distributed under the License is distributed on an "AS IS" BASIS,
-# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-# See the License for the specific language governing permissions and
-# limitations under the License.
-
-from mock import Mock
-
-from twisted.internet import defer
-from twisted.names import dns, error
-
-from synapse.http.endpoint import resolve_service
-
-from tests.utils import MockClock
-
-from . import unittest
-
-
-@unittest.DEBUG
-class DnsTestCase(unittest.TestCase):
- @defer.inlineCallbacks
- def test_resolve(self):
- dns_client_mock = Mock()
-
- service_name = "test_service.example.com"
- host_name = "example.com"
-
- answer_srv = dns.RRHeader(
- type=dns.SRV, payload=dns.Record_SRV(target=host_name)
- )
-
- dns_client_mock.lookupService.return_value = defer.succeed(
- ([answer_srv], None, None)
- )
-
- cache = {}
-
- servers = yield resolve_service(
- service_name, dns_client=dns_client_mock, cache=cache
- )
-
- dns_client_mock.lookupService.assert_called_once_with(service_name)
-
- self.assertEquals(len(servers), 1)
- self.assertEquals(servers, cache[service_name])
- self.assertEquals(servers[0].host, host_name)
-
- @defer.inlineCallbacks
- def test_from_cache_expired_and_dns_fail(self):
- dns_client_mock = Mock()
- dns_client_mock.lookupService.return_value = defer.fail(error.DNSServerError())
-
- service_name = "test_service.example.com"
-
- entry = Mock(spec_set=["expires"])
- entry.expires = 0
-
- cache = {service_name: [entry]}
-
- servers = yield resolve_service(
- service_name, dns_client=dns_client_mock, cache=cache
- )
-
- dns_client_mock.lookupService.assert_called_once_with(service_name)
-
- self.assertEquals(len(servers), 1)
- self.assertEquals(servers, cache[service_name])
-
- @defer.inlineCallbacks
- def test_from_cache(self):
- clock = MockClock()
-
- dns_client_mock = Mock(spec_set=['lookupService'])
- dns_client_mock.lookupService = Mock(spec_set=[])
-
- service_name = "test_service.example.com"
-
- entry = Mock(spec_set=["expires"])
- entry.expires = 999999999
-
- cache = {service_name: [entry]}
-
- servers = yield resolve_service(
- service_name, dns_client=dns_client_mock, cache=cache, clock=clock
- )
-
- self.assertFalse(dns_client_mock.lookupService.called)
-
- self.assertEquals(len(servers), 1)
- self.assertEquals(servers, cache[service_name])
-
- @defer.inlineCallbacks
- def test_empty_cache(self):
- dns_client_mock = Mock()
-
- dns_client_mock.lookupService.return_value = defer.fail(error.DNSServerError())
-
- service_name = "test_service.example.com"
-
- cache = {}
-
- with self.assertRaises(error.DNSServerError):
- yield resolve_service(service_name, dns_client=dns_client_mock, cache=cache)
-
- @defer.inlineCallbacks
- def test_name_error(self):
- dns_client_mock = Mock()
-
- dns_client_mock.lookupService.return_value = defer.fail(error.DNSNameError())
-
- service_name = "test_service.example.com"
-
- cache = {}
-
- servers = yield resolve_service(
- service_name, dns_client=dns_client_mock, cache=cache
- )
-
- self.assertEquals(len(servers), 0)
- self.assertEquals(len(cache), 0)
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