diff --git a/homeassistant/components/simplisafe/__init__.py b/homeassistant/components/simplisafe/__init__.py
index f5a8df0d652..a4ff2a618bc 100644
--- a/homeassistant/components/simplisafe/__init__.py
+++ b/homeassistant/components/simplisafe/__init__.py
@@ -4,7 +4,7 @@ from __future__ import annotations
 import asyncio
 from collections.abc import Callable, Iterable
 from datetime import timedelta
-from typing import TYPE_CHECKING, Any, cast
+from typing import Any, cast
 
 from simplipy import API
 from simplipy.device import Device, DeviceTypes
@@ -235,8 +235,7 @@ def _async_get_system_for_service_call(
     ) is None:
         raise vol.Invalid("Invalid device ID specified")
 
-    if TYPE_CHECKING:
-        assert alarm_control_panel_device_entry.via_device_id
+    assert alarm_control_panel_device_entry.via_device_id
 
     if (
         base_station_device_entry := device_registry.async_get(
@@ -494,8 +493,7 @@ class SimpliSafe:
 
     async def _async_start_websocket_loop(self) -> None:
         """Start a websocket reconnection loop."""
-        if TYPE_CHECKING:
-            assert self._api.websocket
+        assert self._api.websocket
 
         should_reconnect = True
 
@@ -527,8 +525,7 @@ class SimpliSafe:
                 LOGGER.debug("Websocket reconnection task successfully canceled")
                 self._websocket_reconnect_task = None
 
-            if TYPE_CHECKING:
-                assert self._api.websocket
+            assert self._api.websocket
             await self._api.websocket.async_disconnect()
 
     @callback
@@ -565,9 +562,8 @@ class SimpliSafe:
 
     async def async_init(self) -> None:
         """Initialize the SimpliSafe "manager" class."""
-        if TYPE_CHECKING:
-            assert self._api.refresh_token
-            assert self._api.websocket
+        assert self._api.refresh_token
+        assert self._api.websocket
 
         self._api.websocket.add_event_callback(self._async_websocket_on_event)
         self._websocket_reconnect_task = asyncio.create_task(
@@ -576,9 +572,7 @@ class SimpliSafe:
 
         async def async_websocket_disconnect_listener(_: Event) -> None:
             """Define an event handler to disconnect from the websocket."""
-            if TYPE_CHECKING:
-                assert self._api.websocket
-
+            assert self._api.websocket
             await self._async_cancel_websocket_loop()
 
         self.entry.async_on_unload(
@@ -625,10 +619,8 @@ class SimpliSafe:
             """Handle a new refresh token."""
             async_save_refresh_token(token)
 
-            if TYPE_CHECKING:
-                assert self._api.websocket
-
             # Open a new websocket connection with the fresh token:
+            assert self._api.websocket
             await self._async_cancel_websocket_loop()
             self._websocket_reconnect_task = self._hass.async_create_task(
                 self._async_start_websocket_loop()
diff --git a/homeassistant/components/simplisafe/alarm_control_panel.py b/homeassistant/components/simplisafe/alarm_control_panel.py
index 43bcaee2059..cf896c3a320 100644
--- a/homeassistant/components/simplisafe/alarm_control_panel.py
+++ b/homeassistant/components/simplisafe/alarm_control_panel.py
@@ -1,8 +1,6 @@
 """Support for SimpliSafe alarm control panels."""
 from __future__ import annotations
 
-from typing import TYPE_CHECKING
-
 from simplipy.errors import SimplipyError
 from simplipy.system import SystemStates
 from simplipy.system.v3 import SystemV3
@@ -240,8 +238,9 @@ class SimpliSafeAlarm(SimpliSafeEntity, AlarmControlPanelEntity):
     def async_update_from_websocket_event(self, event: WebsocketEvent) -> None:
         """Update the entity when new data comes from the websocket."""
         self._attr_changed_by = event.changed_by
-        if TYPE_CHECKING:
-            assert event.event_type
+
+        assert event.event_type
+
         if state := STATE_MAP_FROM_WEBSOCKET_EVENT.get(event.event_type):
             self._attr_state = state
             self.async_reset_error_count()
diff --git a/homeassistant/components/simplisafe/config_flow.py b/homeassistant/components/simplisafe/config_flow.py
index 44244e9c573..ad6e01f0422 100644
--- a/homeassistant/components/simplisafe/config_flow.py
+++ b/homeassistant/components/simplisafe/config_flow.py
@@ -1,7 +1,7 @@
 """Config flow to configure the SimpliSafe component."""
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Any, NamedTuple
+from typing import Any, NamedTuple
 
 from simplipy import API
 from simplipy.errors import InvalidCredentialsError, SimplipyError
@@ -97,8 +97,7 @@ class SimpliSafeFlowHandler(config_entries.ConfigFlow, domain=DOMAIN):
         if user_input is None:
             return self._async_show_form()
 
-        if TYPE_CHECKING:
-            assert self._oauth_values
+        assert self._oauth_values
 
         errors = {}
         session = aiohttp_client.async_get_clientsession(self.hass)
diff --git a/homeassistant/components/simplisafe/lock.py b/homeassistant/components/simplisafe/lock.py
index 14816cdd579..1e7be48979b 100644
--- a/homeassistant/components/simplisafe/lock.py
+++ b/homeassistant/components/simplisafe/lock.py
@@ -1,7 +1,7 @@
 """Support for SimpliSafe locks."""
 from __future__ import annotations
 
-from typing import TYPE_CHECKING, Any
+from typing import Any
 
 from simplipy.device.lock import Lock, LockStates
 from simplipy.errors import SimplipyError
@@ -100,8 +100,8 @@ class SimpliSafeLock(SimpliSafeEntity, LockEntity):
     @callback
     def async_update_from_websocket_event(self, event: WebsocketEvent) -> None:
         """Update the entity when new data comes from the websocket."""
-        if TYPE_CHECKING:
-            assert event.event_type
+        assert event.event_type
+
         if state := STATE_MAP_FROM_WEBSOCKET_EVENT.get(event.event_type) is not None:
             self._attr_is_locked = state
             self.async_reset_error_count()