diff --git a/tests/http/test_additional_resource.py b/tests/http/test_additional_resource.py
index 05e9c449be..adc318caad 100644
--- a/tests/http/test_additional_resource.py
+++ b/tests/http/test_additional_resource.py
@@ -48,7 +48,7 @@ class AdditionalResourceTests(HomeserverTestCase):
 
         request, channel = make_request(self.reactor, FakeSite(resource), "GET", "/")
 
-        self.assertEqual(request.code, 200)
+        self.assertEqual(channel.code, 200)
         self.assertEqual(channel.json_body, {"some_key": "some_value_async"})
 
     def test_sync(self):
@@ -57,5 +57,5 @@ class AdditionalResourceTests(HomeserverTestCase):
 
         request, channel = make_request(self.reactor, FakeSite(resource), "GET", "/")
 
-        self.assertEqual(request.code, 200)
+        self.assertEqual(channel.code, 200)
         self.assertEqual(channel.json_body, {"some_key": "some_value_sync"})
diff --git a/tests/replication/test_auth.py b/tests/replication/test_auth.py
index fe9e4d5f9a..aee839dc69 100644
--- a/tests/replication/test_auth.py
+++ b/tests/replication/test_auth.py
@@ -66,7 +66,7 @@ class WorkerAuthenticationTestCase(BaseMultiWorkerStreamTestCase):
             "register",
             {"username": "user", "type": "m.login.password", "password": "bar"},
         )  # type: SynapseRequest, FakeChannel
-        self.assertEqual(request_1.code, 401)
+        self.assertEqual(channel_1.code, 401)
 
         # Grab the session
         session = channel_1.json_body["session"]
@@ -84,7 +84,7 @@ class WorkerAuthenticationTestCase(BaseMultiWorkerStreamTestCase):
         """With no authentication the request should finish.
         """
         request, channel = self._test_register()
-        self.assertEqual(request.code, 200)
+        self.assertEqual(channel.code, 200)
 
         # We're given a registered user.
         self.assertEqual(channel.json_body["user_id"], "@user:test")
@@ -94,7 +94,7 @@ class WorkerAuthenticationTestCase(BaseMultiWorkerStreamTestCase):
         """If the main process expects a secret that is not provided, an error results.
         """
         request, channel = self._test_register()
-        self.assertEqual(request.code, 500)
+        self.assertEqual(channel.code, 500)
 
     @override_config(
         {
@@ -106,14 +106,14 @@ class WorkerAuthenticationTestCase(BaseMultiWorkerStreamTestCase):
         """If the main process receives the wrong secret, an error results.
         """
         request, channel = self._test_register()
-        self.assertEqual(request.code, 500)
+        self.assertEqual(channel.code, 500)
 
     @override_config({"worker_replication_secret": "my-secret"})
     def test_authorized(self):
         """The request should finish when the worker provides the authentication header.
         """
         request, channel = self._test_register()
-        self.assertEqual(request.code, 200)
+        self.assertEqual(channel.code, 200)
 
         # We're given a registered user.
         self.assertEqual(channel.json_body["user_id"], "@user:test")
diff --git a/tests/replication/test_client_reader_shard.py b/tests/replication/test_client_reader_shard.py
index fdaad3d8ad..6cdf6a099b 100644
--- a/tests/replication/test_client_reader_shard.py
+++ b/tests/replication/test_client_reader_shard.py
@@ -48,7 +48,7 @@ class ClientReaderTestCase(BaseMultiWorkerStreamTestCase):
             "register",
             {"username": "user", "type": "m.login.password", "password": "bar"},
         )  # type: SynapseRequest, FakeChannel
-        self.assertEqual(request_1.code, 401)
+        self.assertEqual(channel_1.code, 401)
 
         # Grab the session
         session = channel_1.json_body["session"]
@@ -61,7 +61,7 @@ class ClientReaderTestCase(BaseMultiWorkerStreamTestCase):
             "register",
             {"auth": {"session": session, "type": "m.login.dummy"}},
         )  # type: SynapseRequest, FakeChannel
-        self.assertEqual(request_2.code, 200)
+        self.assertEqual(channel_2.code, 200)
 
         # We're given a registered user.
         self.assertEqual(channel_2.json_body["user_id"], "@user:test")
@@ -80,7 +80,7 @@ class ClientReaderTestCase(BaseMultiWorkerStreamTestCase):
             "register",
             {"username": "user", "type": "m.login.password", "password": "bar"},
         )  # type: SynapseRequest, FakeChannel
-        self.assertEqual(request_1.code, 401)
+        self.assertEqual(channel_1.code, 401)
 
         # Grab the session
         session = channel_1.json_body["session"]
@@ -94,7 +94,7 @@ class ClientReaderTestCase(BaseMultiWorkerStreamTestCase):
             "register",
             {"auth": {"session": session, "type": "m.login.dummy"}},
         )  # type: SynapseRequest, FakeChannel
-        self.assertEqual(request_2.code, 200)
+        self.assertEqual(channel_2.code, 200)
 
         # We're given a registered user.
         self.assertEqual(channel_2.json_body["user_id"], "@user:test")
diff --git a/tests/rest/client/v2_alpha/test_account.py b/tests/rest/client/v2_alpha/test_account.py
index 2ac1ecb7d3..11a042f9e9 100644
--- a/tests/rest/client/v2_alpha/test_account.py
+++ b/tests/rest/client/v2_alpha/test_account.py
@@ -353,7 +353,7 @@ class DeactivateTestCase(unittest.HomeserverTestCase):
 
         # Check that this access token has been invalidated.
         request, channel = self.make_request("GET", "account/whoami")
-        self.assertEqual(request.code, 401)
+        self.assertEqual(channel.code, 401)
 
     def test_pending_invites(self):
         """Tests that deactivating a user rejects every pending invite for them."""
@@ -410,7 +410,7 @@ class DeactivateTestCase(unittest.HomeserverTestCase):
         request, channel = self.make_request(
             "POST", "account/deactivate", request_data, access_token=tok
         )
-        self.assertEqual(request.code, 200)
+        self.assertEqual(channel.code, 200)
 
 
 class ThreepidEmailRestTestCase(unittest.HomeserverTestCase):
diff --git a/tests/rest/client/v2_alpha/test_auth.py b/tests/rest/client/v2_alpha/test_auth.py
index ac67a9de29..a35c2646fb 100644
--- a/tests/rest/client/v2_alpha/test_auth.py
+++ b/tests/rest/client/v2_alpha/test_auth.py
@@ -71,7 +71,7 @@ class FallbackAuthTests(unittest.HomeserverTestCase):
             "POST", "register", body
         )  # type: SynapseRequest, FakeChannel
 
-        self.assertEqual(request.code, expected_response)
+        self.assertEqual(channel.code, expected_response)
         return channel
 
     def recaptcha(
@@ -84,7 +84,7 @@ class FallbackAuthTests(unittest.HomeserverTestCase):
         request, channel = self.make_request(
             "GET", "auth/m.login.recaptcha/fallback/web?session=" + session
         )  # type: SynapseRequest, FakeChannel
-        self.assertEqual(request.code, 200)
+        self.assertEqual(channel.code, 200)
 
         request, channel = self.make_request(
             "POST",
@@ -92,7 +92,7 @@ class FallbackAuthTests(unittest.HomeserverTestCase):
             + post_session
             + "&g-recaptcha-response=a",
         )
-        self.assertEqual(request.code, expected_post_response)
+        self.assertEqual(channel.code, expected_post_response)
 
         # The recaptcha handler is called with the response given
         attempts = self.recaptcha_checker.recaptcha_attempts
@@ -201,7 +201,7 @@ class UIAuthTests(unittest.HomeserverTestCase):
         )  # type: SynapseRequest, FakeChannel
 
         # Ensure the response is sane.
-        self.assertEqual(request.code, expected_response)
+        self.assertEqual(channel.code, expected_response)
 
         return channel
 
@@ -214,7 +214,7 @@ class UIAuthTests(unittest.HomeserverTestCase):
         )  # type: SynapseRequest, FakeChannel
 
         # Ensure the response is sane.
-        self.assertEqual(request.code, expected_response)
+        self.assertEqual(channel.code, expected_response)
 
         return channel
 
diff --git a/tests/rest/client/v2_alpha/test_register.py b/tests/rest/client/v2_alpha/test_register.py
index bcb21d0ced..4bf3e0d63b 100644
--- a/tests/rest/client/v2_alpha/test_register.py
+++ b/tests/rest/client/v2_alpha/test_register.py
@@ -559,7 +559,7 @@ class AccountValidityRenewalByEmailTestCase(unittest.HomeserverTestCase):
         request, channel = self.make_request(
             "POST", "account/deactivate", request_data, access_token=tok
         )
-        self.assertEqual(request.code, 200)
+        self.assertEqual(channel.code, 200)
 
         self.reactor.advance(datetime.timedelta(days=8).total_seconds())
 
diff --git a/tests/rest/test_health.py b/tests/rest/test_health.py
index 02a46e5fda..aaf2fb821b 100644
--- a/tests/rest/test_health.py
+++ b/tests/rest/test_health.py
@@ -27,5 +27,5 @@ class HealthCheckTests(unittest.HomeserverTestCase):
     def test_health(self):
         request, channel = self.make_request("GET", "/health", shorthand=False)
 
-        self.assertEqual(request.code, 200)
+        self.assertEqual(channel.code, 200)
         self.assertEqual(channel.result["body"], b"OK")
diff --git a/tests/rest/test_well_known.py b/tests/rest/test_well_known.py
index 6a930f4148..17ded96b9c 100644
--- a/tests/rest/test_well_known.py
+++ b/tests/rest/test_well_known.py
@@ -32,7 +32,7 @@ class WellKnownTests(unittest.HomeserverTestCase):
             "GET", "/.well-known/matrix/client", shorthand=False
         )
 
-        self.assertEqual(request.code, 200)
+        self.assertEqual(channel.code, 200)
         self.assertEqual(
             channel.json_body,
             {
@@ -48,4 +48,4 @@ class WellKnownTests(unittest.HomeserverTestCase):
             "GET", "/.well-known/matrix/client", shorthand=False
         )
 
-        self.assertEqual(request.code, 404)
+        self.assertEqual(channel.code, 404)