diff --git a/homeassistant/components/demo/media_player.py b/homeassistant/components/demo/media_player.py
index ea315707dea..cc02ecba175 100644
--- a/homeassistant/components/demo/media_player.py
+++ b/homeassistant/components/demo/media_player.py
@@ -17,6 +17,7 @@ from homeassistant.components.media_player.const import (
     SUPPORT_SELECT_SOUND_MODE,
     SUPPORT_SELECT_SOURCE,
     SUPPORT_SHUFFLE_SET,
+    SUPPORT_STOP,
     SUPPORT_TURN_OFF,
     SUPPORT_TURN_ON,
     SUPPORT_VOLUME_MUTE,
@@ -66,6 +67,7 @@ YOUTUBE_PLAYER_SUPPORT = (
     | SUPPORT_SHUFFLE_SET
     | SUPPORT_SELECT_SOUND_MODE
     | SUPPORT_SEEK
+    | SUPPORT_STOP
 )
 
 MUSIC_PLAYER_SUPPORT = (
@@ -83,6 +85,7 @@ MUSIC_PLAYER_SUPPORT = (
     | SUPPORT_PREVIOUS_TRACK
     | SUPPORT_NEXT_TRACK
     | SUPPORT_SELECT_SOUND_MODE
+    | SUPPORT_STOP
 )
 
 NETFLIX_PLAYER_SUPPORT = (
@@ -95,6 +98,7 @@ NETFLIX_PLAYER_SUPPORT = (
     | SUPPORT_PREVIOUS_TRACK
     | SUPPORT_NEXT_TRACK
     | SUPPORT_SELECT_SOUND_MODE
+    | SUPPORT_STOP
 )
 
 
@@ -199,6 +203,11 @@ class AbstractDemoPlayer(MediaPlayerEntity):
         self._player_state = STATE_PAUSED
         self.schedule_update_ha_state()
 
+    def media_stop(self):
+        """Send stop command."""
+        self._player_state = STATE_OFF
+        self.schedule_update_ha_state()
+
     def set_shuffle(self, shuffle):
         """Enable/disable shuffle mode."""
         self._shuffle = shuffle
diff --git a/tests/components/demo/test_media_player.py b/tests/components/demo/test_media_player.py
index 4ed41ce9c83..9cc01d18b03 100644
--- a/tests/components/demo/test_media_player.py
+++ b/tests/components/demo/test_media_player.py
@@ -400,6 +400,26 @@ async def test_seek(hass, mock_media_seek):
     assert mock_media_seek.called
 
 
+async def test_stop(hass):
+    """Test stop."""
+    assert await async_setup_component(
+        hass, mp.DOMAIN, {"media_player": {"platform": "demo"}}
+    )
+    await hass.async_block_till_done()
+
+    state = hass.states.get(TEST_ENTITY_ID)
+    assert state.state == STATE_PLAYING
+
+    await hass.services.async_call(
+        mp.DOMAIN,
+        mp.SERVICE_MEDIA_STOP,
+        {ATTR_ENTITY_ID: TEST_ENTITY_ID},
+        blocking=True,
+    )
+    state = hass.states.get(TEST_ENTITY_ID)
+    assert state.state == STATE_OFF
+
+
 async def test_media_image_proxy(hass, hass_client):
     """Test the media server image proxy server ."""
     assert await async_setup_component(