diff --git a/homeassistant/components/xbox/media_source.py b/homeassistant/components/xbox/media_source.py
index e6550b87696..14bc1af5489 100644
--- a/homeassistant/components/xbox/media_source.py
+++ b/homeassistant/components/xbox/media_source.py
@@ -1,4 +1,4 @@
-"""Netatmo Media Source Implementation."""
+"""Xbox Media Source Implementation."""
 from dataclasses import dataclass
 import logging
 from typing import List, Tuple
@@ -78,7 +78,7 @@ class XboxSource(MediaSource):
     name: str = "Xbox Game Media"
 
     def __init__(self, hass: HomeAssistantType, client: XboxLiveClient):
-        """Initialize Netatmo source."""
+        """Initialize Xbox source."""
         super().__init__(DOMAIN)
 
         self.hass: HomeAssistantType = hass
@@ -127,7 +127,7 @@ class XboxSource(MediaSource):
             domain=DOMAIN,
             identifier="",
             media_class=MEDIA_CLASS_DIRECTORY,
-            media_content_type=None,
+            media_content_type="",
             title="Xbox Game Media",
             can_play=False,
             can_expand=True,
@@ -200,7 +200,7 @@ class XboxSource(MediaSource):
             domain=DOMAIN,
             identifier=f"{title}~~{category}",
             media_class=MEDIA_CLASS_DIRECTORY,
-            media_content_type=None,
+            media_content_type="",
             title=f"{owner.title()} {kind.title()}",
             can_play=False,
             can_expand=True,
@@ -223,7 +223,7 @@ def _build_game_item(item: InstalledPackage, images: List[Image]):
         domain=DOMAIN,
         identifier=f"{item.title_id}#{item.name}#{thumbnail}",
         media_class=MEDIA_CLASS_GAME,
-        media_content_type=None,
+        media_content_type="",
         title=item.name,
         can_play=False,
         can_expand=True,
@@ -239,7 +239,7 @@ def _build_categories(title):
         domain=DOMAIN,
         identifier=f"{title}",
         media_class=MEDIA_CLASS_GAME,
-        media_content_type=None,
+        media_content_type="",
         title=name,
         can_play=False,
         can_expand=True,
@@ -257,7 +257,7 @@ def _build_categories(title):
                     domain=DOMAIN,
                     identifier=f"{title}~~{owner}#{kind}",
                     media_class=MEDIA_CLASS_DIRECTORY,
-                    media_content_type=None,
+                    media_content_type="",
                     title=f"{owner.title()} {kind.title()}",
                     can_play=False,
                     can_expand=True,