diff --git a/beets/autotag/hooks.py b/beets/autotag/hooks.py
index 350ca065c..74145e78d 100644
--- a/beets/autotag/hooks.py
+++ b/beets/autotag/hooks.py
@@ -60,10 +60,6 @@ class Map(dict):
     def __setattr__(self, key, value):
         self.__setitem__(key, value)
 
-    def __setitem__(self, key, value):
-        super(Map, self).__setitem__(key, value)
-        self.__dict__.update({key: value})
-
     def __delattr__(self, item):
         self.__delitem__(item)
 
diff --git a/test/test_autotag.py b/test/test_autotag.py
index 97030785b..385b793ee 100644
--- a/test/test_autotag.py
+++ b/test/test_autotag.py
@@ -18,7 +18,6 @@
 from __future__ import division, absolute_import, print_function
 
 import re
-import copy
 import unittest
 
 from test import _common
diff --git a/test/test_ui.py b/test/test_ui.py
index 608c1d7fb..d0be10060 100644
--- a/test/test_ui.py
+++ b/test/test_ui.py
@@ -22,7 +22,6 @@ import shutil
 import re
 import subprocess
 import platform
-from copy import deepcopy
 import six
 import unittest