diff --git a/piker/brokers/kucoin.py b/piker/brokers/kucoin.py
index 85ee7de6..743a78c2 100755
--- a/piker/brokers/kucoin.py
+++ b/piker/brokers/kucoin.py
@@ -197,10 +197,12 @@ class Client:
         '''
 
         if not self._config:
-            raise ValueError('No config found when trying to send authenticated request')
+            raise ValueError(
+                'No config found when trying to send authenticated request')
 
         str_to_sign = (
-            str(int(time.time() * 1000)) + action + f'/api/{api_v}{endpoint}'
+            str(int(time.time() * 1000))
+            + action + f'/api/{api_v}{endpoint}'
         )
 
         signature = base64.b64encode(
@@ -240,7 +242,8 @@ class Client:
 
         '''
         if self._config:
-            headers = self._gen_auth_req_headers(action, endpoint, api_v)
+            headers = self._gen_auth_req_headers(
+                action, endpoint, api_v)
 
         api_url = f'https://api.kucoin.com/api/{api_v}{endpoint}'
 
@@ -271,7 +274,8 @@ class Client:
                 'POST', f'/bullet-{token_type}', 'v1'
             )
         except Exception as e:
-            log.error(f'Error making request for Kucoin ws token -> {str(e)}')
+            log.error(
+                f'Error making request for Kucoin ws token -> {str(e)}')
             return None
 
         if data and 'token' in data:
@@ -371,7 +375,8 @@ class Client:
             end_dt = pendulum.now('UTC').add(minutes=1)
 
         if start_dt is None:
-            start_dt = end_dt.start_of('minute').subtract(minutes=limit)
+            start_dt = end_dt.start_of(
+                'minute').subtract(minutes=limit)
 
         start_dt = int(start_dt.timestamp())
         end_dt = int(end_dt.timestamp())
@@ -429,7 +434,8 @@ class Client:
                 )
             )
 
-        array = np.array(new_bars, dtype=_ohlc_dtype) if as_np else bars
+        array = np.array(
+            new_bars, dtype=_ohlc_dtype) if as_np else bars
         return array
 
 
@@ -497,7 +503,8 @@ async def stream_quotes(
     feed_is_live: trio.Event,
     loglevel: str = '',
     # startup sync
-    task_status: TaskStatus[tuple[dict, dict]] = trio.TASK_STATUS_IGNORED,
+    task_status: TaskStatus[tuple[dict, dict]
+                            ] = trio.TASK_STATUS_IGNORED,
 ) -> None:
     '''
     Required piker api to stream real-time data.
@@ -556,7 +563,7 @@ async def stream_quotes(
 
 
 @acm
-async def subscribe(ws: wsproto.WSConnection, connect_id, sym):
+async def subscribe(ws: wsproto.WSConnection, connect_id, sym) -> AsyncGenerator[None, None]:
     # level 2 sub
     await ws.send_msg(
         {
@@ -608,7 +615,8 @@ async def stream_messages(
         if cs.cancelled_caught:
             timeouts += 1
             if timeouts > 2:
-                log.error('kucoin feed is sh**ing the bed... rebooting...')
+                log.error(
+                    'kucoin feed is sh**ing the bed... rebooting...')
                 await ws._connect()
 
             continue
@@ -670,7 +678,8 @@ async def stream_messages(
                         ],
                     }
 
-
+                case _:
+                    log.warn(f'Unhandled message: {msg}')
 
 
 @acm
@@ -685,9 +694,9 @@ async def open_history_client(
             end_dt: datetime | None = None,
             start_dt: datetime | None = None,
         ) -> tuple[
-            np.ndarray, datetime |
-            None, datetime |
-            None
+            np.ndarray, datetime
+            | None, datetime
+            | None
         ]:  # start  # end
             if timeframe != 60:
                 raise DataUnavailable('Only 1m bars are supported')