diff --git a/Lib/idlelib/idle_test/test_configdialog.py b/Lib/idlelib/idle_test/test_configdialog.py
@@ -9,7 +9,7 @@
import unittest
from unittest import mock
from idlelib.idle_test.mock_idle import Func
-from tkinter import Tk, Frame, IntVar, BooleanVar, DISABLED, NORMAL
from idlelib import config
from idlelib.configdialog import idleConf, changes, tracers

@@ -41,6 +41,8 @@ def tearDownModule():
    global root, dialog
    idleConf.userCfg = usercfg
    tracers.detach()
    del dialog
    root.update_idletasks()
    root.destroy()
@@ -442,97 +444,105 @@ def test_update_help_changes(self):

class VarTraceTest(unittest.TestCase):

    def setUp(self):
-        changes.clear()
-        tracers.clear()
-        self.v1 = IntVar(root)
-        self.v2 = BooleanVar(root)
        self.called = 0

-    def tearDown(self):
-        del self.v1, self.v2
-
    def var_changed_increment(self, *params):
        self.called += 13

    def var_changed_boolean(self, *params):
        pass

    def test_init(self):
-        tracers.__init__()
-        self.assertEqual(tracers.untraced, [])
-        self.assertEqual(tracers.traced, [])

    def test_clear(self):
-        tracers.untraced.append(0)
-        tracers.traced.append(1)
-        tracers.clear()
-        self.assertEqual(tracers.untraced, [])
-        self.assertEqual(tracers.traced, [])

    def test_add(self):
-        tr = tracers
        func = Func()
        cb = tr.make_callback = mock.Mock(return_value=func)

-        v1 = tr.add(self.v1, self.var_changed_increment)
-        self.assertIsInstance(v1, IntVar)
-        v2 = tr.add(self.v2, self.var_changed_boolean)
-        self.assertIsInstance(v2, BooleanVar)

-        v3 = IntVar(root)
-        v3 = tr.add(v3, ('main', 'section', 'option'))
        cb.assert_called_once()
-        cb.assert_called_with(v3, ('main', 'section', 'option'))

-        expected = [(v1, self.var_changed_increment),
-                    (v2, self.var_changed_boolean),
-                    (v3, func)]
        self.assertEqual(tr.traced, [])
        self.assertEqual(tr.untraced, expected)

        del tr.make_callback

    def test_make_callback(self):
-        cb = tracers.make_callback(self.v1, ('main', 'section', 'option'))
        self.assertTrue(callable(cb))
-        self.v1.set(42)
        # Not attached, so set didn't invoke the callback.
        self.assertNotIn('section', changes['main'])
        # Invoke callback manually.
        cb()
        self.assertIn('section', changes['main'])
        self.assertEqual(changes['main']['section']['option'], '42')

    def test_attach_detach(self):
-        tr = tracers
-        v1 = tr.add(self.v1, self.var_changed_increment)
-        v2 = tr.add(self.v2, self.var_changed_boolean)
-        expected = [(v1, self.var_changed_increment),
-                    (v2, self.var_changed_boolean)]

        # Attach callbacks and test call increment.
        tr.attach()
        self.assertEqual(tr.untraced, [])
        self.assertCountEqual(tr.traced, expected)
-        v1.set(1)
-        self.assertEqual(v1.get(), 1)
        self.assertEqual(self.called, 13)

        # Check that only one callback is attached to a variable.
        # If more than one callback were attached, then var_changed_increment
        # would be called twice and the counter would be 2.
        self.called = 0
        tr.attach()
-        v1.set(1)
        self.assertEqual(self.called, 13)

        # Detach callbacks.
        self.called = 0
        tr.detach()
        self.assertEqual(tr.traced, [])
        self.assertCountEqual(tr.untraced, expected)
-        v1.set(1)
        self.assertEqual(self.called, 0)



diff --git a/Misc/NEWS.d/next/IDLE/2017-08-07-14-02-56.bpo-31130.FbsC7f.rst b/Misc/NEWS.d/next/IDLE/2017-08-07-14-02-56.bpo-31130.FbsC7f.rst
@@ -0,0 +1 @@