diff --git a/beetsplug/bpd/__init__.py b/beetsplug/bpd/__init__.py
index 7c40cb6b6..97d89d914 100644
--- a/beetsplug/bpd/__init__.py
+++ b/beetsplug/bpd/__init__.py
@@ -847,6 +847,9 @@ class MPDConnection(Connection):
                     yield self.send(err.response())
                     break
                 continue
+            if line == u'noidle':
+                # When not in idle, this command sends no response.
+                continue
 
             if clist is not None:
                 # Command list already opened.
diff --git a/test/test_player.py b/test/test_player.py
index 048f2cedd..f22c19261 100644
--- a/test/test_player.py
+++ b/test/test_player.py
@@ -457,6 +457,14 @@ class BPDQueryTest(BPDTestHelper):
             response = client.send_command('noidle')
         self._assert_ok(response)
 
+    def test_cmd_noidle_when_not_idle(self):
+        with self.run_bpd() as client:
+            # Manually send a command without reading a response.
+            request = client.serialise_command('noidle')
+            client.sock.sendall(request)
+            response = client.send_command('notacommand')
+        self._assert_failed(response, bpd.ERROR_UNKNOWN)
+
 
 class BPDPlaybackTest(BPDTestHelper):
     test_implements_playback = implements({