diff --git a/homeassistant/components/vizio/config_flow.py b/homeassistant/components/vizio/config_flow.py
index 8acc602dd36..a80105579fe 100644
--- a/homeassistant/components/vizio/config_flow.py
+++ b/homeassistant/components/vizio/config_flow.py
@@ -187,11 +187,11 @@ class VizioConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
     def __init__(self) -> None:
         """Initialize config flow."""
         self._user_schema = None
-        self._must_show_form = None
+        self._must_show_form: bool | None = None
         self._ch_type = None
         self._pairing_token = None
-        self._data = None
-        self._apps = {}
+        self._data: dict[str, Any] | None = None
+        self._apps: dict[str, list] = {}
 
     async def _create_entry(self, input_dict: dict[str, Any]) -> FlowResult:
         """Create vizio config entry."""
@@ -387,10 +387,11 @@ class VizioConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
         Ask user for PIN to complete pairing process.
         """
-        errors = {}
+        errors: dict[str, str] = {}
 
         # Start pairing process if it hasn't already started
         if not self._ch_type and not self._pairing_token:
+            assert self._data
             dev = VizioAsync(
                 DEVICE_ID,
                 self._data[CONF_HOST],
@@ -448,6 +449,7 @@ class VizioConfigFlow(config_entries.ConfigFlow, domain=DOMAIN):
 
     async def _pairing_complete(self, step_id: str) -> FlowResult:
         """Handle config flow completion."""
+        assert self._data
         if not self._must_show_form:
             return await self._create_entry(self._data)
 
diff --git a/homeassistant/components/vizio/media_player.py b/homeassistant/components/vizio/media_player.py
index b2d33551020..ab48f1405a9 100644
--- a/homeassistant/components/vizio/media_player.py
+++ b/homeassistant/components/vizio/media_player.py
@@ -3,7 +3,6 @@ from __future__ import annotations
 
 from datetime import timedelta
 import logging
-from typing import Any
 
 from pyvizio import VizioAsync
 from pyvizio.api.apps import find_app_name
@@ -103,7 +102,10 @@ async def async_setup_entry(
         params["data"] = new_data
 
     if params:
-        hass.config_entries.async_update_entry(config_entry, **params)
+        hass.config_entries.async_update_entry(
+            config_entry,
+            **params,  # type: ignore[arg-type]
+        )
 
     device = VizioAsync(
         DEVICE_ID,
@@ -134,7 +136,7 @@ class VizioDevice(MediaPlayerEntity):
         config_entry: ConfigEntry,
         device: VizioAsync,
         name: str,
-        device_class: str,
+        device_class: MediaPlayerDeviceClass,
         apps_coordinator: DataUpdateCoordinator,
     ) -> None:
         """Initialize Vizio device."""
@@ -145,8 +147,8 @@ class VizioDevice(MediaPlayerEntity):
         self._current_input = None
         self._current_app_config = None
         self._attr_app_name = None
-        self._available_inputs = []
-        self._available_apps = []
+        self._available_inputs: list[str] = []
+        self._available_apps: list[str] = []
         self._all_apps = apps_coordinator.data if apps_coordinator else None
         self._conf_apps = config_entry.options.get(CONF_APPS, {})
         self._additional_app_configs = config_entry.data.get(CONF_APPS, {}).get(
@@ -195,6 +197,7 @@ class VizioDevice(MediaPlayerEntity):
             self._attr_available = True
 
         if not self._attr_device_info:
+            assert self._attr_unique_id
             self._attr_device_info = DeviceInfo(
                 identifiers={(DOMAIN, self._attr_unique_id)},
                 manufacturer="VIZIO",
@@ -276,7 +279,7 @@ class VizioDevice(MediaPlayerEntity):
         if self._attr_app_name == NO_APP_RUNNING:
             self._attr_app_name = None
 
-    def _get_additional_app_names(self) -> list[dict[str, Any]]:
+    def _get_additional_app_names(self) -> list[str]:
         """Return list of additional apps that were included in configuration.yaml."""
         return [
             additional_app["name"] for additional_app in self._additional_app_configs
diff --git a/homeassistant/helpers/config_validation.py b/homeassistant/helpers/config_validation.py
index f459d96040b..2ed4bc7abab 100644
--- a/homeassistant/helpers/config_validation.py
+++ b/homeassistant/helpers/config_validation.py
@@ -758,7 +758,7 @@ def ensure_list_csv(value: Any) -> list:
 class multi_select:
     """Multi select validator returning list of selected values."""
 
-    def __init__(self, options: dict) -> None:
+    def __init__(self, options: dict | list) -> None:
         """Initialize multi select."""
         self.options = options
 
diff --git a/mypy.ini b/mypy.ini
index 8a9c5b0478a..f19f5f5dc68 100644
--- a/mypy.ini
+++ b/mypy.ini
@@ -2940,12 +2940,6 @@ ignore_errors = true
 [mypy-homeassistant.components.unifi.unifi_entity_base]
 ignore_errors = true
 
-[mypy-homeassistant.components.vizio.config_flow]
-ignore_errors = true
-
-[mypy-homeassistant.components.vizio.media_player]
-ignore_errors = true
-
 [mypy-homeassistant.components.withings]
 ignore_errors = true
 
diff --git a/script/hassfest/mypy_config.py b/script/hassfest/mypy_config.py
index b7fb778cfee..09a9820e7b4 100644
--- a/script/hassfest/mypy_config.py
+++ b/script/hassfest/mypy_config.py
@@ -129,8 +129,6 @@ IGNORED_MODULES: Final[list[str]] = [
     "homeassistant.components.unifi.device_tracker",
     "homeassistant.components.unifi.diagnostics",
     "homeassistant.components.unifi.unifi_entity_base",
-    "homeassistant.components.vizio.config_flow",
-    "homeassistant.components.vizio.media_player",
     "homeassistant.components.withings",
     "homeassistant.components.withings.binary_sensor",
     "homeassistant.components.withings.common",