Add type hints to `tests/rest/client` (#12072)

11 files changed, 160 insertions, 102 deletions

diff --git a/changelog.d/12072.misc b/changelog.d/12072.misc
new file mode 100644
index 0000000000..0360dbd61e
--- /dev/null
+++ b/changelog.d/12072.misc
@@ -0,0 +1 @@
+Add type hints to `tests/rest/client`.
diff --git a/tests/rest/client/test_consent.py b/tests/rest/client/test_consent.py
index fcdc565814..b1ca81a911 100644
--- a/tests/rest/client/test_consent.py
+++ b/tests/rest/client/test_consent.py
@@ -13,11 +13,16 @@
 # limitations under the License.
 
 import os
+from http import HTTPStatus
+
+from twisted.test.proto_helpers import MemoryReactor
 
 import synapse.rest.admin
 from synapse.api.urls import ConsentURIBuilder
 from synapse.rest.client import login, room
 from synapse.rest.consent import consent_resource
+from synapse.server import HomeServer
+from synapse.util import Clock
 
 from tests import unittest
 from tests.server import FakeSite, make_request
@@ -32,7 +37,7 @@ class ConsentResourceTestCase(unittest.HomeserverTestCase):
     user_id = True
     hijack_auth = False
 
-    def make_homeserver(self, reactor, clock):
+    def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
 
         config = self.default_config()
         config["form_secret"] = "123abc"
@@ -56,7 +61,7 @@ class ConsentResourceTestCase(unittest.HomeserverTestCase):
         hs = self.setup_test_homeserver(config=config)
         return hs
 
-    def test_render_public_consent(self):
+    def test_render_public_consent(self) -> None:
         """You can observe the terms form without specifying a user"""
         resource = consent_resource.ConsentResource(self.hs)
         channel = make_request(
@@ -66,9 +71,9 @@ class ConsentResourceTestCase(unittest.HomeserverTestCase):
             "/consent?v=1",
             shorthand=False,
         )
-        self.assertEqual(channel.code, 200)
+        self.assertEqual(channel.code, HTTPStatus.OK)
 
-    def test_accept_consent(self):
+    def test_accept_consent(self) -> None:
         """
         A user can use the consent form to accept the terms.
         """
@@ -92,7 +97,7 @@ class ConsentResourceTestCase(unittest.HomeserverTestCase):
             access_token=access_token,
             shorthand=False,
         )
-        self.assertEqual(channel.code, 200)
+        self.assertEqual(channel.code, HTTPStatus.OK)
 
         # Get the version from the body, and whether we've consented
         version, consented = channel.result["body"].decode("ascii").split(",")
@@ -107,7 +112,7 @@ class ConsentResourceTestCase(unittest.HomeserverTestCase):
             access_token=access_token,
             shorthand=False,
         )
-        self.assertEqual(channel.code, 200)
+        self.assertEqual(channel.code, HTTPStatus.OK)
 
         # Fetch the consent page, to get the consent version -- it should have
         # changed
@@ -119,7 +124,7 @@ class ConsentResourceTestCase(unittest.HomeserverTestCase):
             access_token=access_token,
             shorthand=False,
         )
-        self.assertEqual(channel.code, 200)
+        self.assertEqual(channel.code, HTTPStatus.OK)
 
         # Get the version from the body, and check that it's the version we
         # agreed to, and that we've consented to it.
diff --git a/tests/rest/client/test_device_lists.py b/tests/rest/client/test_device_lists.py
index 16070cf027..a8af4e2435 100644
--- a/tests/rest/client/test_device_lists.py
+++ b/tests/rest/client/test_device_lists.py
@@ -11,6 +11,8 @@
 # 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 http import HTTPStatus
+
 from synapse.rest import admin, devices, room, sync
 from synapse.rest.client import account, login, register
 
@@ -30,7 +32,7 @@ class DeviceListsTestCase(unittest.HomeserverTestCase):
         devices.register_servlets,
     ]
 
-    def test_receiving_local_device_list_changes(self):
+    def test_receiving_local_device_list_changes(self) -> None:
         """Tests that a local users that share a room receive each other's device list
         changes.
         """
@@ -84,7 +86,7 @@ class DeviceListsTestCase(unittest.HomeserverTestCase):
             },
             access_token=alice_access_token,
         )
-        self.assertEqual(channel.code, 200, channel.json_body)
+        self.assertEqual(channel.code, HTTPStatus.OK, channel.json_body)
 
         # Check that bob's incremental sync contains the updated device list.
         # If not, the client would only receive the device list update on the
@@ -97,7 +99,7 @@ class DeviceListsTestCase(unittest.HomeserverTestCase):
         )
         self.assertIn(alice_user_id, changed_device_lists, bob_sync_channel.json_body)
 
-    def test_not_receiving_local_device_list_changes(self):
+    def test_not_receiving_local_device_list_changes(self) -> None:
         """Tests a local users DO NOT receive device updates from each other if they do not
         share a room.
         """
@@ -119,7 +121,7 @@ class DeviceListsTestCase(unittest.HomeserverTestCase):
             "/sync",
             access_token=bob_access_token,
         )
-        self.assertEqual(channel.code, 200, channel.json_body)
+        self.assertEqual(channel.code, HTTPStatus.OK, channel.json_body)
         next_batch_token = channel.json_body["next_batch"]
 
         # ...and then an incremental sync. This should block until the sync stream is woken up,
@@ -141,11 +143,13 @@ class DeviceListsTestCase(unittest.HomeserverTestCase):
             },
             access_token=alice_access_token,
         )
-        self.assertEqual(channel.code, 200, channel.json_body)
+        self.assertEqual(channel.code, HTTPStatus.OK, channel.json_body)
 
         # Check that bob's incremental sync does not contain the updated device list.
         bob_sync_channel.await_result()
-        self.assertEqual(bob_sync_channel.code, 200, bob_sync_channel.json_body)
+        self.assertEqual(
+            bob_sync_channel.code, HTTPStatus.OK, bob_sync_channel.json_body
+        )
 
         changed_device_lists = bob_sync_channel.json_body.get("device_lists", {}).get(
             "changed", []
diff --git a/tests/rest/client/test_ephemeral_message.py b/tests/rest/client/test_ephemeral_message.py
index 3d7aa8ec86..9fa1f82dfe 100644
--- a/tests/rest/client/test_ephemeral_message.py
+++ b/tests/rest/client/test_ephemeral_message.py
@@ -11,9 +11,16 @@
 # 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 http import HTTPStatus
+
+from twisted.test.proto_helpers import MemoryReactor
+
 from synapse.api.constants import EventContentFields, EventTypes
 from synapse.rest import admin
 from synapse.rest.client import room
+from synapse.server import HomeServer
+from synapse.types import JsonDict
+from synapse.util import Clock
 
 from tests import unittest
 
@@ -27,7 +34,7 @@ class EphemeralMessageTestCase(unittest.HomeserverTestCase):
         room.register_servlets,
     ]
 
-    def make_homeserver(self, reactor, clock):
+    def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
         config = self.default_config()
 
         config["enable_ephemeral_messages"] = True
@@ -35,10 +42,10 @@ class EphemeralMessageTestCase(unittest.HomeserverTestCase):
         self.hs = self.setup_test_homeserver(config=config)
         return self.hs
 
-    def prepare(self, reactor, clock, homeserver):
+    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
         self.room_id = self.helper.create_room_as(self.user_id)
 
-    def test_message_expiry_no_delay(self):
+    def test_message_expiry_no_delay(self) -> None:
         """Tests that sending a message sent with a m.self_destruct_after field set to the
         past results in that event being deleted right away.
         """
@@ -61,7 +68,7 @@ class EphemeralMessageTestCase(unittest.HomeserverTestCase):
         event_content = self.get_event(self.room_id, event_id)["content"]
         self.assertFalse(bool(event_content), event_content)
 
-    def test_message_expiry_delay(self):
+    def test_message_expiry_delay(self) -> None:
         """Tests that sending a message with a m.self_destruct_after field set to the
         future results in that event not being deleted right away, but advancing the
         clock to after that expiry timestamp causes the event to be deleted.
@@ -89,7 +96,9 @@ class EphemeralMessageTestCase(unittest.HomeserverTestCase):
         event_content = self.get_event(self.room_id, event_id)["content"]
         self.assertFalse(bool(event_content), event_content)
 
-    def get_event(self, room_id, event_id, expected_code=200):
+    def get_event(
+        self, room_id: str, event_id: str, expected_code: int = HTTPStatus.OK
+    ) -> JsonDict:
         url = "/_matrix/client/r0/rooms/%s/event/%s" % (room_id, event_id)
 
         channel = self.make_request("GET", url)
diff --git a/tests/rest/client/test_identity.py b/tests/rest/client/test_identity.py
index becb4e8dcc..299b9d21e2 100644
--- a/tests/rest/client/test_identity.py
+++ b/tests/rest/client/test_identity.py
@@ -13,9 +13,14 @@
 # limitations under the License.
 
 import json
+from http import HTTPStatus
+
+from twisted.test.proto_helpers import MemoryReactor
 
 import synapse.rest.admin
 from synapse.rest.client import login, room
+from synapse.server import HomeServer
+from synapse.util import Clock
 
 from tests import unittest
 
@@ -28,7 +33,7 @@ class IdentityTestCase(unittest.HomeserverTestCase):
         login.register_servlets,
     ]
 
-    def make_homeserver(self, reactor, clock):
+    def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
 
         config = self.default_config()
         config["enable_3pid_lookup"] = False
@@ -36,14 +41,14 @@ class IdentityTestCase(unittest.HomeserverTestCase):
 
         return self.hs
 
-    def test_3pid_lookup_disabled(self):
+    def test_3pid_lookup_disabled(self) -> None:
         self.hs.config.registration.enable_3pid_lookup = False
 
         self.register_user("kermit", "monkey")
         tok = self.login("kermit", "monkey")
 
         channel = self.make_request(b"POST", "/createRoom", b"{}", access_token=tok)
-        self.assertEquals(channel.result["code"], b"200", channel.result)
+        self.assertEqual(channel.code, HTTPStatus.OK, channel.result)
         room_id = channel.json_body["room_id"]
 
         params = {
@@ -56,4 +61,4 @@ class IdentityTestCase(unittest.HomeserverTestCase):
         channel = self.make_request(
             b"POST", request_url, request_data, access_token=tok
         )
-        self.assertEquals(channel.result["code"], b"403", channel.result)
+        self.assertEqual(channel.code, HTTPStatus.FORBIDDEN, channel.result)
diff --git a/tests/rest/client/test_keys.py b/tests/rest/client/test_keys.py
index d7fa635eae..bbc8e74243 100644
--- a/tests/rest/client/test_keys.py
+++ b/tests/rest/client/test_keys.py
@@ -28,7 +28,7 @@ class KeyQueryTestCase(unittest.HomeserverTestCase):
         login.register_servlets,
     ]
 
-    def test_rejects_device_id_ice_key_outside_of_list(self):
+    def test_rejects_device_id_ice_key_outside_of_list(self) -> None:
         self.register_user("alice", "wonderland")
         alice_token = self.login("alice", "wonderland")
         bob = self.register_user("bob", "uncle")
@@ -49,7 +49,7 @@ class KeyQueryTestCase(unittest.HomeserverTestCase):
             channel.result,
         )
 
-    def test_rejects_device_key_given_as_map_to_bool(self):
+    def test_rejects_device_key_given_as_map_to_bool(self) -> None:
         self.register_user("alice", "wonderland")
         alice_token = self.login("alice", "wonderland")
         bob = self.register_user("bob", "uncle")
@@ -73,7 +73,7 @@ class KeyQueryTestCase(unittest.HomeserverTestCase):
             channel.result,
         )
 
-    def test_requires_device_key(self):
+    def test_requires_device_key(self) -> None:
         """`device_keys` is required. We should complain if it's missing."""
         self.register_user("alice", "wonderland")
         alice_token = self.login("alice", "wonderland")
diff --git a/tests/rest/client/test_password_policy.py b/tests/rest/client/test_password_policy.py
index 3cf5871899..3a74d2e96c 100644
--- a/tests/rest/client/test_password_policy.py
+++ b/tests/rest/client/test_password_policy.py
@@ -13,11 +13,16 @@
 # limitations under the License.
 
 import json
+from http import HTTPStatus
+
+from twisted.test.proto_helpers import MemoryReactor
 
 from synapse.api.constants import LoginType
 from synapse.api.errors import Codes
 from synapse.rest import admin
 from synapse.rest.client import account, login, password_policy, register
+from synapse.server import HomeServer
+from synapse.util import Clock
 
 from tests import unittest
 
@@ -46,7 +51,7 @@ class PasswordPolicyTestCase(unittest.HomeserverTestCase):
         account.register_servlets,
     ]
 
-    def make_homeserver(self, reactor, clock):
+    def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
         self.register_url = "/_matrix/client/r0/register"
         self.policy = {
             "enabled": True,
@@ -65,12 +70,12 @@ class PasswordPolicyTestCase(unittest.HomeserverTestCase):
         hs = self.setup_test_homeserver(config=config)
         return hs
 
-    def test_get_policy(self):
+    def test_get_policy(self) -> None:
         """Tests if the /password_policy endpoint returns the configured policy."""
 
         channel = self.make_request("GET", "/_matrix/client/r0/password_policy")
 
-        self.assertEqual(channel.code, 200, channel.result)
+        self.assertEqual(channel.code, HTTPStatus.OK, channel.result)
         self.assertEqual(
             channel.json_body,
             {
@@ -83,70 +88,70 @@ class PasswordPolicyTestCase(unittest.HomeserverTestCase):
             channel.result,
         )
 
-    def test_password_too_short(self):
+    def test_password_too_short(self) -> None:
         request_data = json.dumps({"username": "kermit", "password": "shorty"})
         channel = self.make_request("POST", self.register_url, request_data)
 
-        self.assertEqual(channel.code, 400, channel.result)
+        self.assertEqual(channel.code, HTTPStatus.BAD_REQUEST, channel.result)
         self.assertEqual(
             channel.json_body["errcode"],
             Codes.PASSWORD_TOO_SHORT,
             channel.result,
         )
 
-    def test_password_no_digit(self):
+    def test_password_no_digit(self) -> None:
         request_data = json.dumps({"username": "kermit", "password": "longerpassword"})
         channel = self.make_request("POST", self.register_url, request_data)
 
-        self.assertEqual(channel.code, 400, channel.result)
+        self.assertEqual(channel.code, HTTPStatus.BAD_REQUEST, channel.result)
         self.assertEqual(
             channel.json_body["errcode"],
             Codes.PASSWORD_NO_DIGIT,
             channel.result,
         )
 
-    def test_password_no_symbol(self):
+    def test_password_no_symbol(self) -> None:
         request_data = json.dumps({"username": "kermit", "password": "l0ngerpassword"})
         channel = self.make_request("POST", self.register_url, request_data)
 
-        self.assertEqual(channel.code, 400, channel.result)
+        self.assertEqual(channel.code, HTTPStatus.BAD_REQUEST, channel.result)
         self.assertEqual(
             channel.json_body["errcode"],
             Codes.PASSWORD_NO_SYMBOL,
             channel.result,
         )
 
-    def test_password_no_uppercase(self):
+    def test_password_no_uppercase(self) -> None:
         request_data = json.dumps({"username": "kermit", "password": "l0ngerpassword!"})
         channel = self.make_request("POST", self.register_url, request_data)
 
-        self.assertEqual(channel.code, 400, channel.result)
+        self.assertEqual(channel.code, HTTPStatus.BAD_REQUEST, channel.result)
         self.assertEqual(
             channel.json_body["errcode"],
             Codes.PASSWORD_NO_UPPERCASE,
             channel.result,
         )
 
-    def test_password_no_lowercase(self):
+    def test_password_no_lowercase(self) -> None:
         request_data = json.dumps({"username": "kermit", "password": "L0NGERPASSWORD!"})
         channel = self.make_request("POST", self.register_url, request_data)
 
-        self.assertEqual(channel.code, 400, channel.result)
+        self.assertEqual(channel.code, HTTPStatus.BAD_REQUEST, channel.result)
         self.assertEqual(
             channel.json_body["errcode"],
             Codes.PASSWORD_NO_LOWERCASE,
             channel.result,
         )
 
-    def test_password_compliant(self):
+    def test_password_compliant(self) -> None:
         request_data = json.dumps({"username": "kermit", "password": "L0ngerpassword!"})
         channel = self.make_request("POST", self.register_url, request_data)
 
         # Getting a 401 here means the password has passed validation and the server has
         # responded with a list of registration flows.
-        self.assertEqual(channel.code, 401, channel.result)
+        self.assertEqual(channel.code, HTTPStatus.UNAUTHORIZED, channel.result)
 
-    def test_password_change(self):
+    def test_password_change(self) -> None:
         """This doesn't test every possible use case, only that hitting /account/password
         triggers the password validation code.
         """
@@ -173,5 +178,5 @@ class PasswordPolicyTestCase(unittest.HomeserverTestCase):
             access_token=tok,
         )
 
-        self.assertEqual(channel.code, 400, channel.result)
+        self.assertEqual(channel.code, HTTPStatus.BAD_REQUEST, channel.result)
         self.assertEqual(channel.json_body["errcode"], Codes.PASSWORD_NO_DIGIT)
diff --git a/tests/rest/client/test_power_levels.py b/tests/rest/client/test_power_levels.py
index c0de4c93a8..27dcfc83d2 100644
--- a/tests/rest/client/test_power_levels.py
+++ b/tests/rest/client/test_power_levels.py
@@ -11,11 +11,16 @@
 # 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 http import HTTPStatus
+
+from twisted.test.proto_helpers import MemoryReactor
 
 from synapse.api.errors import Codes
 from synapse.events.utils import CANONICALJSON_MAX_INT, CANONICALJSON_MIN_INT
 from synapse.rest import admin
 from synapse.rest.client import login, room, sync
+from synapse.server import HomeServer
+from synapse.util import Clock
 
 from tests.unittest import HomeserverTestCase
 
@@ -30,12 +35,12 @@ class PowerLevelsTestCase(HomeserverTestCase):
         sync.register_servlets,
     ]
 
-    def make_homeserver(self, reactor, clock):
+    def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
         config = self.default_config()
 
         return self.setup_test_homeserver(config=config)
 
-    def prepare(self, reactor, clock, hs):
+    def prepare(self, reactor: MemoryReactor, clock: Clock, hs: HomeServer) -> None:
         # register a room admin, moderator and regular user
         self.admin_user_id = self.register_user("admin", "pass")
         self.admin_access_token = self.login("admin", "pass")
@@ -88,7 +93,7 @@ class PowerLevelsTestCase(HomeserverTestCase):
             tok=self.admin_access_token,
         )
 
-    def test_non_admins_cannot_enable_room_encryption(self):
+    def test_non_admins_cannot_enable_room_encryption(self) -> None:
         # have the mod try to enable room encryption
         self.helper.send_state(
             self.room_id,
@@ -104,10 +109,10 @@ class PowerLevelsTestCase(HomeserverTestCase):
             "m.room.encryption",
             {"algorithm": "m.megolm.v1.aes-sha2"},
             tok=self.user_access_token,
-            expect_code=403,  # expect failure
+            expect_code=HTTPStatus.FORBIDDEN,  # expect failure
         )
 
-    def test_non_admins_cannot_send_server_acl(self):
+    def test_non_admins_cannot_send_server_acl(self) -> None:
         # have the mod try to send a server ACL
         self.helper.send_state(
             self.room_id,
@@ -118,7 +123,7 @@ class PowerLevelsTestCase(HomeserverTestCase):
                 "deny": ["*.evil.com", "evil.com"],
             },
             tok=self.mod_access_token,
-            expect_code=403,  # expect failure
+            expect_code=HTTPStatus.FORBIDDEN,  # expect failure
         )
 
         # have the user try to send a server ACL
@@ -131,10 +136,10 @@ class PowerLevelsTestCase(HomeserverTestCase):
                 "deny": ["*.evil.com", "evil.com"],
             },
             tok=self.user_access_token,
-            expect_code=403,  # expect failure
+            expect_code=HTTPStatus.FORBIDDEN,  # expect failure
         )
 
-    def test_non_admins_cannot_tombstone_room(self):
+    def test_non_admins_cannot_tombstone_room(self) -> None:
         # Create another room that will serve as our "upgraded room"
         self.upgraded_room_id = self.helper.create_room_as(
             self.admin_user_id, tok=self.admin_access_token
@@ -149,7 +154,7 @@ class PowerLevelsTestCase(HomeserverTestCase):
                 "replacement_room": self.upgraded_room_id,
             },
             tok=self.mod_access_token,
-            expect_code=403,  # expect failure
+            expect_code=HTTPStatus.FORBIDDEN,  # expect failure
         )
 
         # have the user try to send a tombstone event
@@ -164,17 +169,17 @@ class PowerLevelsTestCase(HomeserverTestCase):
             expect_code=403,  # expect failure
         )
 
-    def test_admins_can_enable_room_encryption(self):
+    def test_admins_can_enable_room_encryption(self) -> None:
         # have the admin try to enable room encryption
         self.helper.send_state(
             self.room_id,
             "m.room.encryption",
             {"algorithm": "m.megolm.v1.aes-sha2"},
             tok=self.admin_access_token,
-            expect_code=200,  # expect success
+            expect_code=HTTPStatus.OK,  # expect success
         )
 
-    def test_admins_can_send_server_acl(self):
+    def test_admins_can_send_server_acl(self) -> None:
         # have the admin try to send a server ACL
         self.helper.send_state(
             self.room_id,
@@ -185,10 +190,10 @@ class PowerLevelsTestCase(HomeserverTestCase):
                 "deny": ["*.evil.com", "evil.com"],
             },
             tok=self.admin_access_token,
-            expect_code=200,  # expect success
+            expect_code=HTTPStatus.OK,  # expect success
         )
 
-    def test_admins_can_tombstone_room(self):
+    def test_admins_can_tombstone_room(self) -> None:
         # Create another room that will serve as our "upgraded room"
         self.upgraded_room_id = self.helper.create_room_as(
             self.admin_user_id, tok=self.admin_access_token
@@ -203,10 +208,10 @@ class PowerLevelsTestCase(HomeserverTestCase):
                 "replacement_room": self.upgraded_room_id,
             },
             tok=self.admin_access_token,
-            expect_code=200,  # expect success
+            expect_code=HTTPStatus.OK,  # expect success
         )
 
-    def test_cannot_set_string_power_levels(self):
+    def test_cannot_set_string_power_levels(self) -> None:
         room_power_levels = self.helper.get_state(
             self.room_id,
             "m.room.power_levels",
@@ -221,7 +226,7 @@ class PowerLevelsTestCase(HomeserverTestCase):
             "m.room.power_levels",
             room_power_levels,
             tok=self.admin_access_token,
-            expect_code=400,  # expect failure
+            expect_code=HTTPStatus.BAD_REQUEST,  # expect failure
         )
 
         self.assertEqual(
@@ -230,7 +235,7 @@ class PowerLevelsTestCase(HomeserverTestCase):
             body,
         )
 
-    def test_cannot_set_unsafe_large_power_levels(self):
+    def test_cannot_set_unsafe_large_power_levels(self) -> None:
         room_power_levels = self.helper.get_state(
             self.room_id,
             "m.room.power_levels",
@@ -247,7 +252,7 @@ class PowerLevelsTestCase(HomeserverTestCase):
             "m.room.power_levels",
             room_power_levels,
             tok=self.admin_access_token,
-            expect_code=400,  # expect failure
+            expect_code=HTTPStatus.BAD_REQUEST,  # expect failure
         )
 
         self.assertEqual(
@@ -256,7 +261,7 @@ class PowerLevelsTestCase(HomeserverTestCase):
             body,
         )
 
-    def test_cannot_set_unsafe_small_power_levels(self):
+    def test_cannot_set_unsafe_small_power_levels(self) -> None:
         room_power_levels = self.helper.get_state(
             self.room_id,
             "m.room.power_levels",
@@ -273,7 +278,7 @@ class PowerLevelsTestCase(HomeserverTestCase):
             "m.room.power_levels",
             room_power_levels,
             tok=self.admin_access_token,
-            expect_code=400,  # expect failure
+            expect_code=HTTPStatus.BAD_REQUEST,  # expect failure
         )
 
         self.assertEqual(
diff --git a/tests/rest/client/test_presence.py b/tests/rest/client/test_presence.py
index 56fe1a3d01..0abe378fe4 100644
--- a/tests/rest/client/test_presence.py
+++ b/tests/rest/client/test_presence.py
@@ -11,14 +11,17 @@
 # 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 http import HTTPStatus
 from unittest.mock import Mock
 
 from twisted.internet import defer
+from twisted.test.proto_helpers import MemoryReactor
 
 from synapse.handlers.presence import PresenceHandler
 from synapse.rest.client import presence
+from synapse.server import HomeServer
 from synapse.types import UserID
+from synapse.util import Clock
 
 from tests import unittest
 
@@ -31,7 +34,7 @@ class PresenceTestCase(unittest.HomeserverTestCase):
     user = UserID.from_string(user_id)
     servlets = [presence.register_servlets]
 
-    def make_homeserver(self, reactor, clock):
+    def make_homeserver(self, reactor: MemoryReactor, clock: Clock) -> HomeServer:
 
         presence_handler = Mock(spec=PresenceHandler)
         presence_handler.set_state.return_value = defer.succeed(None)
@@ -45,7 +48,7 @@ class PresenceTestCase(unittest.HomeserverTestCase):
 
         return hs
 
-    def test_put_presence(self):
+    def test_put_presence(self) -> None:
         """
         PUT to the status endpoint with use_presence enabled will call
         set_state on the presence handler.
@@ -57,11 +60,11 @@ class PresenceTestCase(unittest.HomeserverTestCase):
             "PUT", "/presence/%s/status" % (self.user_id,), body
         )
 
-        self.assertEqual(channel.code, 200)
+        self.assertEqual(channel.code, HTTPStatus.OK)
         self.assertEqual(self.hs.get_presence_handler().set_state.call_count, 1)
 
     @unittest.override_config({"use_presence": False})
-    def test_put_presence_disabled(self):
+    def test_put_presence_disabled(self) -> None:
         """
         PUT to the status endpoint with use_presence disabled will NOT call
         set_state on the presence handler.
@@ -72,5 +75,5 @@ class PresenceTestCase(unittest.HomeserverTestCase):
             "PUT", "/presence/%s/status" % (self.user_id,), body
         )
 
-        self.assertEqual(channel.code, 200)
+        self.assertEqual(channel.code, HTTPStatus.OK)
         self.assertEqual(self.hs.get_presence_handler().set_state.call_count, 0)
diff --git a/tests/rest/client/test_room_batch.py b/tests/rest/client/test_room_batch.py
index e9f8704035..44f333a0ee 100644
--- a/tests/rest/client/test_room_batch.py
+++ b/tests/rest/client/test_room_batch.py
@@ -134,7 +134,7 @@ class RoomBatchTestCase(unittest.HomeserverTestCase):
         return room_id, event_id_a, event_id_b, event_id_c
 
     @unittest.override_config({"experimental_features": {"msc2716_enabled": True}})
-    def test_same_state_groups_for_whole_historical_batch(self):
+    def test_same_state_groups_for_whole_historical_batch(self) -> None:
         """Make sure that when using the `/batch_send` endpoint to import a
         bunch of historical messages, it re-uses the same `state_group` across
         the whole batch. This is an easy optimization to make sure we're getting
diff --git a/tests/rest/client/utils.py b/tests/rest/client/utils.py
index 2b3fdadffa..46cd5f70a8 100644
--- a/tests/rest/client/utils.py
+++ b/tests/rest/client/utils.py
@@ -19,6 +19,7 @@ import json
 import re
 import time
 import urllib.parse
+from http import HTTPStatus
 from typing import (
     Any,
     AnyStr,
@@ -89,7 +90,7 @@ class RestHelper:
         is_public: Optional[bool] = None,
         room_version: Optional[str] = None,
         tok: Optional[str] = None,
-        expect_code: int = 200,
+        expect_code: int = HTTPStatus.OK,
         extra_content: Optional[Dict] = None,
         custom_headers: Optional[Iterable[Tuple[AnyStr, AnyStr]]] = None,
     ) -> Optional[str]:
@@ -137,12 +138,19 @@ class RestHelper:
         assert channel.result["code"] == b"%d" % expect_code, channel.result
         self.auth_user_id = temp_id
 
-        if expect_code == 200:
+        if expect_code == HTTPStatus.OK:
             return channel.json_body["room_id"]
         else:
             return None
 
-    def invite(self, room=None, src=None, targ=None, expect_code=200, tok=None):
+    def invite(
+        self,
+        room: Optional[str] = None,
+        src: Optional[str] = None,
+        targ: Optional[str] = None,
+        expect_code: int = HTTPStatus.OK,
+        tok: Optional[str] = None,
+    ) -> None:
         self.change_membership(
             room=room,
             src=src,
@@ -156,7 +164,7 @@ class RestHelper:
         self,
         room: str,
         user: Optional[str] = None,
-        expect_code: int = 200,
+        expect_code: int = HTTPStatus.OK,
         tok: Optional[str] = None,
         appservice_user_id: Optional[str] = None,
     ) -> None:
@@ -170,7 +178,14 @@ class RestHelper:
             expect_code=expect_code,
         )
 
-    def knock(self, room=None, user=None, reason=None, expect_code=200, tok=None):
+    def knock(
+        self,
+        room: Optional[str] = None,
+        user: Optional[str] = None,
+        reason: Optional[str] = None,
+        expect_code: int = HTTPStatus.OK,
+        tok: Optional[str] = None,
+    ) -> None:
         temp_id = self.auth_user_id
         self.auth_user_id = user
         path = "/knock/%s" % room
@@ -199,7 +214,13 @@ class RestHelper:
 
         self.auth_user_id = temp_id
 
-    def leave(self, room=None, user=None, expect_code=200, tok=None):
+    def leave(
+        self,
+        room: Optional[str] = None,
+        user: Optional[str] = None,
+        expect_code: int = HTTPStatus.OK,
+        tok: Optional[str] = None,
+    ) -> None:
         self.change_membership(
             room=room,
             src=user,
@@ -209,7 +230,7 @@ class RestHelper:
             expect_code=expect_code,
         )
 
-    def ban(self, room: str, src: str, targ: str, **kwargs: object):
+    def ban(self, room: str, src: str, targ: str, **kwargs: object) -> None:
         """A convenience helper: `change_membership` with `membership` preset to "ban"."""
         self.change_membership(
             room=room,
@@ -228,7 +249,7 @@ class RestHelper:
         extra_data: Optional[dict] = None,
         tok: Optional[str] = None,
         appservice_user_id: Optional[str] = None,
-        expect_code: int = 200,
+        expect_code: int = HTTPStatus.OK,
         expect_errcode: Optional[str] = None,
     ) -> None:
         """
@@ -294,13 +315,13 @@ class RestHelper:
 
     def send(
         self,
-        room_id,
-        body=None,
-        txn_id=None,
-        tok=None,
-        expect_code=200,
+        room_id: str,
+        body: Optional[str] = None,
+        txn_id: Optional[str] = None,
+        tok: Optional[str] = None,
+        expect_code: int = HTTPStatus.OK,
         custom_headers: Optional[Iterable[Tuple[AnyStr, AnyStr]]] = None,
-    ):
+    ) -> JsonDict:
         if body is None:
             body = "body_text_here"
 
@@ -318,14 +339,14 @@ class RestHelper:
 
     def send_event(
         self,
-        room_id,
-        type,
+        room_id: str,
+        type: str,
         content: Optional[dict] = None,
-        txn_id=None,
-        tok=None,
-        expect_code=200,
+        txn_id: Optional[str] = None,
+        tok: Optional[str] = None,
+        expect_code: int = HTTPStatus.OK,
         custom_headers: Optional[Iterable[Tuple[AnyStr, AnyStr]]] = None,
-    ):
+    ) -> JsonDict:
         if txn_id is None:
             txn_id = "m%s" % (str(time.time()))
 
@@ -358,10 +379,10 @@ class RestHelper:
         event_type: str,
         body: Optional[Dict[str, Any]],
         tok: str,
-        expect_code: int = 200,
+        expect_code: int = HTTPStatus.OK,
         state_key: str = "",
         method: str = "GET",
-    ) -> Dict:
+    ) -> JsonDict:
         """Read or write some state from a given room
 
         Args:
@@ -410,9 +431,9 @@ class RestHelper:
         room_id: str,
         event_type: str,
         tok: str,
-        expect_code: int = 200,
+        expect_code: int = HTTPStatus.OK,
         state_key: str = "",
-    ):
+    ) -> JsonDict:
         """Gets some state from a room
 
         Args:
@@ -438,9 +459,9 @@ class RestHelper:
         event_type: str,
         body: Dict[str, Any],
         tok: str,
-        expect_code: int = 200,
+        expect_code: int = HTTPStatus.OK,
         state_key: str = "",
-    ):
+    ) -> JsonDict:
         """Set some state in a room
 
         Args:
@@ -467,8 +488,8 @@ class RestHelper:
         image_data: bytes,
         tok: str,
         filename: str = "test.png",
-        expect_code: int = 200,
-    ) -> dict:
+        expect_code: int = HTTPStatus.OK,
+    ) -> JsonDict:
         """Upload a piece of test media to the media repo
         Args:
             resource: The resource that will handle the upload request
@@ -513,7 +534,7 @@ class RestHelper:
         channel = self.auth_via_oidc({"sub": remote_user_id}, client_redirect_url)
 
         # expect a confirmation page
-        assert channel.code == 200, channel.result
+        assert channel.code == HTTPStatus.OK, channel.result
 
         # fish the matrix login token out of the body of the confirmation page
         m = re.search(
@@ -532,7 +553,7 @@ class RestHelper:
             "/login",
             content={"type": "m.login.token", "token": login_token},
         )
-        assert channel.code == 200
+        assert channel.code == HTTPStatus.OK
         return channel.json_body
 
     def auth_via_oidc(
@@ -641,7 +662,7 @@ class RestHelper:
             (expected_uri, resp_obj) = expected_requests.pop(0)
             assert uri == expected_uri
             resp = FakeResponse(
-                code=200,
+                code=HTTPStatus.OK,
                 phrase=b"OK",
                 body=json.dumps(resp_obj).encode("utf-8"),
             )
@@ -739,7 +760,7 @@ class RestHelper:
             self.hs.get_reactor(), self.site, "GET", sso_redirect_endpoint
         )
         # that should serve a confirmation page
-        assert channel.code == 200, channel.text_body
+        assert channel.code == HTTPStatus.OK, channel.text_body
         channel.extract_cookies(cookies)
 
         # parse the confirmation page to fish out the link.