diff --git a/homeassistant/components/rachio/switch.py b/homeassistant/components/rachio/switch.py
index 65487ded792..55427741bf0 100644
--- a/homeassistant/components/rachio/switch.py
+++ b/homeassistant/components/rachio/switch.py
@@ -291,6 +291,7 @@ class RachioRainDelay(RachioSwitch):
             endtime = parse_datetime(args[0][0][KEY_RAIN_DELAY_END])
             _LOGGER.debug("Rain delay expires at %s", endtime)
             self._state = True
+            assert endtime is not None
             self._cancel_update = async_track_point_in_utc_time(
                 self.hass, self._delay_expiration, endtime
             )
diff --git a/mypy.ini b/mypy.ini
index abe3ca7da9a..5e92d2bbe15 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -2176,9 +2176,6 @@ ignore_errors = true
 [mypy-homeassistant.components.profiler.*]
 ignore_errors = true
 
-[mypy-homeassistant.components.rachio.*]
-ignore_errors = true
-
 [mypy-homeassistant.components.ring.*]
 ignore_errors = true
 
diff --git a/script/hassfest/mypy_config.py b/script/hassfest/mypy_config.py
index d17bdc97169..c4ed4722220 100644
--- a/script/hassfest/mypy_config.py
+++ b/script/hassfest/mypy_config.py
@@ -67,7 +67,6 @@ IGNORED_MODULES: Final[list[str]] = [
     "homeassistant.components.plum_lightpad.*",
     "homeassistant.components.point.*",
     "homeassistant.components.profiler.*",
-    "homeassistant.components.rachio.*",
     "homeassistant.components.ring.*",
     "homeassistant.components.ruckus_unleashed.*",
     "homeassistant.components.screenlogic.*",