diff --git a/tests/rest/client/test_power_levels.py b/tests/rest/client/test_power_levels.py
index 681e60ed62..83f339c834 100644
--- a/tests/rest/client/test_power_levels.py
+++ b/tests/rest/client/test_power_levels.py
@@ -73,9 +73,7 @@ class PowerLevelsTestCase(HomeserverTestCase):
 
         # Mod the mod
         room_power_levels = self.helper.get_state(
-            self.room_id,
-            "m.room.power_levels",
-            tok=self.admin_access_token,
+            self.room_id, "m.room.power_levels", tok=self.admin_access_token,
         )
 
         # Update existing power levels with mod at PL50
@@ -113,14 +111,9 @@ class PowerLevelsTestCase(HomeserverTestCase):
             self.room_id,
             "m.room.server_acl",
             {
-                "allow": [
-                    "*"
-                ],
+                "allow": ["*"],
                 "allow_ip_literals": False,
-                "deny": [
-                    "*.evil.com",
-                    "evil.com"
-                ]
+                "deny": ["*.evil.com", "evil.com"],
             },
             tok=self.mod_access_token,
             expect_code=403,  # expect failure
@@ -131,14 +124,9 @@ class PowerLevelsTestCase(HomeserverTestCase):
             self.room_id,
             "m.room.server_acl",
             {
-                "allow": [
-                    "*"
-                ],
+                "allow": ["*"],
                 "allow_ip_literals": False,
-                "deny": [
-                    "*.evil.com",
-                    "evil.com"
-                ]
+                "deny": ["*.evil.com", "evil.com"],
             },
             tok=self.user_access_token,
             expect_code=403,  # expect failure
diff --git a/tests/rest/client/v1/utils.py b/tests/rest/client/v1/utils.py
index ad69150322..58d809e374 100644
--- a/tests/rest/client/v1/utils.py
+++ b/tests/rest/client/v1/utils.py
@@ -142,7 +142,16 @@ class RestHelper(object):
 
         return channel.json_body
 
-    def _read_write_state(self, room_id, event_type, body, tok, expect_code=200, state_key="", method="GET"):
+    def _read_write_state(
+        self,
+        room_id,
+        event_type,
+        body,
+        tok,
+        expect_code=200,
+        state_key="",
+        method="GET",
+    ):
         path = "/_matrix/client/r0/rooms/%s/state/%s/%s" % (
             room_id,
             event_type,
@@ -164,10 +173,14 @@ class RestHelper(object):
         return channel.json_body
 
     def get_state(self, room_id, event_type, tok, expect_code=200, state_key=""):
-        return self._read_write_state(room_id, event_type, {}, tok, expect_code, state_key, method="GET")
+        return self._read_write_state(
+            room_id, event_type, {}, tok, expect_code, state_key, method="GET"
+        )
 
     def send_state(self, room_id, event_type, body, tok, expect_code=200, state_key=""):
-        return self._read_write_state(room_id, event_type, body, tok, expect_code, state_key, method="PUT")
+        return self._read_write_state(
+            room_id, event_type, body, tok, expect_code, state_key, method="PUT"
+        )
 
     def upload_media(
         self,