diff --git a/Lib/idlelib/CodeContext.py b/Lib/idlelib/CodeContext.py
index 5d55f77..63cc82c 100644
--- a/Lib/idlelib/CodeContext.py
+++ b/Lib/idlelib/CodeContext.py
@@ -11,11 +11,10 @@
 """
 import Tkinter
 from configHandler import idleConf
-from sets import Set
 import re
 from sys import maxint as INFINITY
 
-BLOCKOPENERS = Set(["class", "def", "elif", "else", "except", "finally", "for",
+BLOCKOPENERS = set(["class", "def", "elif", "else", "except", "finally", "for",
                     "if", "try", "while"])
 UPDATEINTERVAL = 100 # millisec
 FONTUPDATEINTERVAL = 1000 # millisec
diff --git a/Lib/test/test_bsddb.py b/Lib/test/test_bsddb.py
index 513e541..474f3da 100755
--- a/Lib/test/test_bsddb.py
+++ b/Lib/test/test_bsddb.py
@@ -8,7 +8,6 @@
 import dbhash # Just so we know it's imported
 import unittest
 from test import test_support
-from sets import Set
 
 class TestBSDDB(unittest.TestCase):
     openflag = 'c'
@@ -53,7 +52,7 @@
             self.assertEqual(self.f[k], v)
 
     def assertSetEquals(self, seqn1, seqn2):
-        self.assertEqual(Set(seqn1), Set(seqn2))
+        self.assertEqual(set(seqn1), set(seqn2))
 
     def test_mapping_iteration_methods(self):
         f = self.f
diff --git a/Lib/test/test_mimetools.py b/Lib/test/test_mimetools.py
index 96bbb36..b0b5b01 100644
--- a/Lib/test/test_mimetools.py
+++ b/Lib/test/test_mimetools.py
@@ -1,7 +1,7 @@
 import unittest
 from test import test_support
 
-import string, StringIO, mimetools, sets
+import string, StringIO, mimetools
 
 msgtext1 = mimetools.Message(StringIO.StringIO(
 """Content-Type: text/plain; charset=iso-8859-1; format=flowed
@@ -25,7 +25,7 @@
             self.assertEqual(o.getvalue(), start)
 
     def test_boundary(self):
-        s = sets.Set([""])
+        s = set([""])
         for i in xrange(100):
             nb = mimetools.choose_boundary()
             self.assert_(nb not in s)
diff --git a/Lib/test/test_mimetypes.py b/Lib/test/test_mimetypes.py
index 8c584ad..0190c2f 100644
--- a/Lib/test/test_mimetypes.py
+++ b/Lib/test/test_mimetypes.py
@@ -1,7 +1,6 @@
 import mimetypes
 import StringIO
 import unittest
-from sets import Set
 
 from test import test_support
 
@@ -52,8 +51,8 @@
         # First try strict.  Use a set here for testing the results because if
         # test_urllib2 is run before test_mimetypes, global state is modified
         # such that the 'all' set will have more items in it.
-        all = Set(self.db.guess_all_extensions('text/plain', strict=True))
-        unless(all >= Set(['.bat', '.c', '.h', '.ksh', '.pl', '.txt']))
+        all = set(self.db.guess_all_extensions('text/plain', strict=True))
+        unless(all >= set(['.bat', '.c', '.h', '.ksh', '.pl', '.txt']))
         # And now non-strict
         all = self.db.guess_all_extensions('image/jpg', strict=False)
         all.sort()