diff --git a/homeassistant/components/websocket_api/auth.py b/homeassistant/components/websocket_api/auth.py
index f09c2601328..0a681692c3d 100644
--- a/homeassistant/components/websocket_api/auth.py
+++ b/homeassistant/components/websocket_api/auth.py
@@ -12,6 +12,7 @@ from homeassistant.auth.models import RefreshToken, User
 from homeassistant.components.http.ban import process_success_login, process_wrong_login
 from homeassistant.const import __version__
 from homeassistant.core import CALLBACK_TYPE, HomeAssistant
+from homeassistant.helpers.json import json_bytes
 from homeassistant.util.json import JsonValueType
 
 from .connection import ActiveConnection
@@ -34,15 +35,10 @@ AUTH_MESSAGE_SCHEMA: Final = vol.Schema(
     }
 )
 
-
-def auth_ok_message() -> dict[str, str]:
-    """Return an auth_ok message."""
-    return {"type": TYPE_AUTH_OK, "ha_version": __version__}
-
-
-def auth_required_message() -> dict[str, str]:
-    """Return an auth_required message."""
-    return {"type": TYPE_AUTH_REQUIRED, "ha_version": __version__}
+AUTH_OK_MESSAGE = json_bytes({"type": TYPE_AUTH_OK, "ha_version": __version__})
+AUTH_REQUIRED_MESSAGE = json_bytes(
+    {"type": TYPE_AUTH_REQUIRED, "ha_version": __version__}
+)
 
 
 def auth_invalid_message(message: str) -> dict[str, str]:
@@ -104,7 +100,7 @@ class AuthPhase:
         """Create an active connection."""
         self._logger.debug("Auth OK")
         process_success_login(self._request)
-        self._send_message(auth_ok_message())
+        self._send_message(AUTH_OK_MESSAGE)
         return ActiveConnection(
             self._logger, self._hass, self._send_message, user, refresh_token
         )
diff --git a/homeassistant/components/websocket_api/http.py b/homeassistant/components/websocket_api/http.py
index c8c5d00cb2a..d966e4e26ef 100644
--- a/homeassistant/components/websocket_api/http.py
+++ b/homeassistant/components/websocket_api/http.py
@@ -18,7 +18,7 @@ from homeassistant.helpers.dispatcher import async_dispatcher_send
 from homeassistant.helpers.event import async_call_later
 from homeassistant.util.json import json_loads
 
-from .auth import AuthPhase, auth_required_message
+from .auth import AUTH_REQUIRED_MESSAGE, AuthPhase
 from .const import (
     DATA_CONNECTIONS,
     MAX_PENDING_MSG,
@@ -266,6 +266,11 @@ class WebSocketHandler:
         if self._writer_task is not None:
             self._writer_task.cancel()
 
+    @callback
+    def _async_handle_hass_stop(self, event: Event) -> None:
+        """Cancel this connection."""
+        self._cancel()
+
     async def async_handle(self) -> web.WebSocketResponse:
         """Handle a websocket response."""
         request = self._request
@@ -286,12 +291,9 @@ class WebSocketHandler:
         debug("%s: Connected from %s", self.description, request.remote)
         self._handle_task = asyncio.current_task()
 
-        @callback
-        def handle_hass_stop(event: Event) -> None:
-            """Cancel this connection."""
-            self._cancel()
-
-        unsub_stop = hass.bus.async_listen(EVENT_HOMEASSISTANT_STOP, handle_hass_stop)
+        unsub_stop = hass.bus.async_listen(
+            EVENT_HOMEASSISTANT_STOP, self._async_handle_hass_stop
+        )
 
         # As the webserver is now started before the start
         # event we do not want to block for websocket responses
@@ -302,7 +304,7 @@ class WebSocketHandler:
         disconnect_warn = None
 
         try:
-            self._send_message(auth_required_message())
+            self._send_message(AUTH_REQUIRED_MESSAGE)
 
             # Auth Phase
             try:
@@ -379,7 +381,7 @@ class WebSocketHandler:
                 if msg.type in (WSMsgType.CLOSE, WSMsgType.CLOSED, WSMsgType.CLOSING):
                     break
 
-                if msg.type == WSMsgType.BINARY:
+                if msg.type is WSMsgType.BINARY:
                     if len(msg.data) < 1:
                         disconnect_warn = "Received invalid binary message."
                         break
@@ -388,7 +390,7 @@ class WebSocketHandler:
                     async_handle_binary(handler, payload)
                     continue
 
-                if msg.type != WSMsgType.TEXT:
+                if msg.type is not WSMsgType.TEXT:
                     disconnect_warn = "Received non-Text message."
                     break
 
@@ -401,7 +403,8 @@ class WebSocketHandler:
                 if is_enabled_for(logging_debug):
                     debug("%s: Received %s", self.description, command_msg_data)
 
-                if not isinstance(command_msg_data, list):
+                # command_msg_data is always deserialized from JSON as a list
+                if type(command_msg_data) is not list:  # noqa: E721
                     async_handle_str(command_msg_data)
                     continue