diff --git a/homeassistant/components/tts/media_source.py b/homeassistant/components/tts/media_source.py
index d3c0998bb77..f096e082364 100644
--- a/homeassistant/components/tts/media_source.py
+++ b/homeassistant/components/tts/media_source.py
@@ -180,7 +180,7 @@ class TTSMediaSource(MediaSource):
             raise BrowseError("Unknown provider")
 
         if isinstance(engine_instance, TextToSpeechEntity):
-            engine_domain = engine_instance.platform.domain
+            engine_domain = engine_instance.platform.platform_name
         else:
             engine_domain = engine
 
diff --git a/tests/components/tts/test_media_source.py b/tests/components/tts/test_media_source.py
index c9d70c7f43e..eb4b09cab5b 100644
--- a/tests/components/tts/test_media_source.py
+++ b/tests/components/tts/test_media_source.py
@@ -78,6 +78,7 @@ async def test_browsing(hass: HomeAssistant, setup: str) -> None:
     assert item_child.children is None
     assert item_child.can_play is False
     assert item_child.can_expand is True
+    assert item_child.thumbnail == "https://brands.home-assistant.io/_/test/logo.png"
 
     item_child = await media_source.async_browse_media(
         hass, item.children[0].media_content_id + "?message=bla"