diff --git a/homeassistant/components/media_player/universal.py b/homeassistant/components/media_player/universal.py
index a7173e35a48..27a0714527d 100644
--- a/homeassistant/components/media_player/universal.py
+++ b/homeassistant/components/media_player/universal.py
@@ -154,7 +154,8 @@ class UniversalMediaPlayer(MediaPlayerDevice):
         if allow_override and service_name in self._cmds:
             yield from async_call_from_config(
                 self.hass, self._cmds[service_name],
-                variables=service_data, blocking=True)
+                variables=service_data, blocking=True,
+                validate_config=False)
             return
 
         active_child = self._child_state
diff --git a/tests/components/media_player/test_universal.py b/tests/components/media_player/test_universal.py
index ffd4008f385..b7f3165f11c 100644
--- a/tests/components/media_player/test_universal.py
+++ b/tests/components/media_player/test_universal.py
@@ -143,7 +143,7 @@ class MockMediaPlayer(media_player.MediaPlayerDevice):
 
     def select_source(self, source):
         """Set the input source."""
-        self._state = source
+        self._source = source
 
     def clear_playlist(self):
         """Clear players playlist."""