diff --git a/homeassistant/components/assist_pipeline/pipeline.py b/homeassistant/components/assist_pipeline/pipeline.py
index 045ea97eff3..c738f7be060 100644
--- a/homeassistant/components/assist_pipeline/pipeline.py
+++ b/homeassistant/components/assist_pipeline/pipeline.py
@@ -1275,14 +1275,17 @@ class PipelineRun:
 
         self.tts_stream.async_set_message(tts_input)
 
-        tts_output = {
-            "token": self.tts_stream.token,
-            "url": self.tts_stream.url,
-            "mime_type": self.tts_stream.content_type,
-        }
-
         self.process_event(
-            PipelineEvent(PipelineEventType.TTS_END, {"tts_output": tts_output})
+            PipelineEvent(
+                PipelineEventType.TTS_END,
+                {
+                    "tts_output": {
+                        "token": self.tts_stream.token,
+                        "url": self.tts_stream.url,
+                        "mime_type": self.tts_stream.content_type,
+                    }
+                },
+            )
         )
 
     def _capture_chunk(self, audio_bytes: bytes | None) -> None:
diff --git a/tests/components/assist_pipeline/snapshots/test_init.ambr b/tests/components/assist_pipeline/snapshots/test_init.ambr
index f772f877d3a..67231202347 100644
--- a/tests/components/assist_pipeline/snapshots/test_init.ambr
+++ b/tests/components/assist_pipeline/snapshots/test_init.ambr
@@ -84,7 +84,6 @@
     dict({
       'data': dict({
         'tts_output': dict({
-          'media_id': "media-source://tts/test?message=Sorry,+I+couldn't+understand+that&language=en-US&tts_options=%7B%22voice%22:%22james_earl_jones%22%7D",
           'mime_type': 'audio/mpeg',
           'token': 'test_token.mp3',
           'url': '/api/tts_proxy/test_token.mp3',
@@ -183,7 +182,6 @@
     dict({
       'data': dict({
         'tts_output': dict({
-          'media_id': "media-source://tts/test?message=Sorry,+I+couldn't+understand+that&language=en-US&tts_options=%7B%22voice%22:%22Arnold+Schwarzenegger%22%7D",
           'mime_type': 'audio/mpeg',
           'token': 'test_token.mp3',
           'url': '/api/tts_proxy/test_token.mp3',
@@ -282,7 +280,6 @@
     dict({
       'data': dict({
         'tts_output': dict({
-          'media_id': "media-source://tts/test?message=Sorry,+I+couldn't+understand+that&language=en-US&tts_options=%7B%22voice%22:%22Arnold+Schwarzenegger%22%7D",
           'mime_type': 'audio/mpeg',
           'token': 'test_token.mp3',
           'url': '/api/tts_proxy/test_token.mp3',
@@ -405,7 +402,6 @@
     dict({
       'data': dict({
         'tts_output': dict({
-          'media_id': "media-source://tts/test?message=Sorry,+I+couldn't+understand+that&language=en-US&tts_options=%7B%22voice%22:%22james_earl_jones%22%7D",
           'mime_type': 'audio/mpeg',
           'token': 'test_token.mp3',
           'url': '/api/tts_proxy/test_token.mp3',
diff --git a/tests/components/assist_pipeline/snapshots/test_websocket.ambr b/tests/components/assist_pipeline/snapshots/test_websocket.ambr
index 57ae0095236..50e65372587 100644
--- a/tests/components/assist_pipeline/snapshots/test_websocket.ambr
+++ b/tests/components/assist_pipeline/snapshots/test_websocket.ambr
@@ -80,7 +80,6 @@
 # name: test_audio_pipeline.6
   dict({
     'tts_output': dict({
-      'media_id': "media-source://tts/test?message=Sorry,+I+couldn't+understand+that&language=en-US&tts_options=%7B%22voice%22:%22james_earl_jones%22%7D",
       'mime_type': 'audio/mpeg',
       'token': 'test_token.mp3',
       'url': '/api/tts_proxy/test_token.mp3',
@@ -171,7 +170,6 @@
 # name: test_audio_pipeline_debug.6
   dict({
     'tts_output': dict({
-      'media_id': "media-source://tts/test?message=Sorry,+I+couldn't+understand+that&language=en-US&tts_options=%7B%22voice%22:%22james_earl_jones%22%7D",
       'mime_type': 'audio/mpeg',
       'token': 'test_token.mp3',
       'url': '/api/tts_proxy/test_token.mp3',
@@ -274,7 +272,6 @@
 # name: test_audio_pipeline_with_enhancements.6
   dict({
     'tts_output': dict({
-      'media_id': "media-source://tts/test?message=Sorry,+I+couldn't+understand+that&language=en-US&tts_options=%7B%22voice%22:%22james_earl_jones%22%7D",
       'mime_type': 'audio/mpeg',
       'token': 'test_token.mp3',
       'url': '/api/tts_proxy/test_token.mp3',
@@ -387,7 +384,6 @@
 # name: test_audio_pipeline_with_wake_word_no_timeout.8
   dict({
     'tts_output': dict({
-      'media_id': "media-source://tts/test?message=Sorry,+I+couldn't+understand+that&language=en-US&tts_options=%7B%22voice%22:%22james_earl_jones%22%7D",
       'mime_type': 'audio/mpeg',
       'token': 'test_token.mp3',
       'url': '/api/tts_proxy/test_token.mp3',