diff --git a/mopidy/outputs/base.py b/mopidy/outputs/base.py
index 372d7d70..fbc86688 100644
--- a/mopidy/outputs/base.py
+++ b/mopidy/outputs/base.py
@@ -3,33 +3,6 @@ class BaseOutput(object):
     Base class for audio outputs.
     """
 
-    def __init__(self, core_queue):
-        self.core_queue = core_queue
-
-    def start(self):
-        """
-        Start the output.
-
-        *MAY be implemented by subclasses.*
-        """
-        pass
-
-    def destroy(self):
-        """
-        Destroy the output.
-
-        *MAY be implemented by subclasses.*
-        """
-        pass
-
-    def process_message(self, message):
-        """
-        Process messages with the output as destination.
-
-        *MUST be implemented by subclass.*
-        """
-        raise NotImplementedError
-
     def play_uri(self, uri):
         """
         Play URI.
diff --git a/mopidy/outputs/dummy.py b/mopidy/outputs/dummy.py
index 060ee02f..738575f3 100644
--- a/mopidy/outputs/dummy.py
+++ b/mopidy/outputs/dummy.py
@@ -8,15 +8,6 @@ class DummyOutput(BaseOutput):
     # pylint: disable = R0902
     # Too many instance attributes (9/7)
 
-    #: For testing. :class:`True` if :meth:`start` has been called.
-    start_called = False
-
-    #: For testing. :class:`True` if :meth:`destroy` has been called.
-    destroy_called = False
-
-    #: For testing. Contains all messages :meth:`process_message` has received.
-    messages = []
-
     #: For testing. Contains the last URI passed to :meth:`play_uri`.
     uri = None
 
@@ -40,15 +31,6 @@ class DummyOutput(BaseOutput):
     #: For testing. Contains the current volume.
     volume = 100
 
-    def start(self):
-        self.start_called = True
-
-    def destroy(self):
-        self.destroy_called = True
-
-    def process_message(self, message):
-        self.messages.append(message)
-
     def play_uri(self, uri):
         self.uri = uri
         return True