Issue #22236: Tkinter tests now don't reuse default root window. New root

window is created for every test class. Fixed Tkinter images copying operations in NoDefaultRoot mode. Tcl command names generated for "after" callbacks now contains a name of original function.

Issue #22236: Tkinter tests now don't reuse default root window. New root
window is created for every test class. Fixed Tkinter images copying operations in NoDefaultRoot mode. Tcl command names generated for "after" callbacks now contains a name of original function.
66106626 · Serhiy Storchaka · fa6e73ba · d00aff2f · 66106626 · 66106626
Commit 66106626 authored Aug 24, 2014 by Serhiy Storchaka
15 changed files
--- a/Lib/test/test_ttk_guionly.py
+++ b/Lib/test/test_ttk_guionly.py
@@ -6,7 +6,7 @@ from test import support
 support.import_module('_tkinter')
 # Make sure tkinter._fix runs to set up the environment
-support.import_fresh_module('tkinter')
+tkinter = support.import_fresh_module('tkinter')
 # Skip test if tk cannot be initialized.
 support.requires('gui')
@@ -14,20 +14,24 @@ support.requires('gui')
 from _tkinter import TclError
 from tkinter import ttk
 from tkinter.test import runtktests
-from tkinter.test.support import get_tk_root
+root = None
 try:
-    ttk.Button()
+    root = tkinter.Tk()
+    button = ttk.Button(root)
+    button.destroy()
+    del button
 except TclError as msg:
    # assuming ttk is not available
    raise unittest.SkipTest("ttk not available: %s" % msg)
+finally:
+    if root is not None:
+        root.destroy()
+    del root
 def test_main():
-    try:
+    support.run_unittest(
-        support.run_unittest(
+            *runtktests.get_tests(text=False, packages=['test_ttk']))
-                *runtktests.get_tests(text=False, packages=['test_ttk']))
-    finally:
-        get_tk_root().destroy()
 if __name__ == '__main__':
    test_main()
--- a/Lib/tkinter/__init__.py
+++ b/Lib/tkinter/__init__.py
@@ -562,6 +562,7 @@ class Misc:
                        self.deletecommand(name)
                    except TclError:
                        pass
+            callit.__name__ = func.__name__
            name = self._register(callit)
            return self.tk.call('after', ms, name)
    def after_idle(self, func, *args):
@@ -3314,7 +3315,7 @@ class Image:
            master = _default_root
            if not master:
                raise RuntimeError('Too early to create image')
-        self.tk = master.tk
+        self.tk = getattr(master, 'tk', master)
        if not name:
            Image._last_id += 1
            name = "pyimage%r" % (Image._last_id,) # tk itself would use image<x>
@@ -3385,20 +3386,20 @@ class PhotoImage(Image):
    # XXX copy -from, -to, ...?
    def copy(self):
        """Return a new PhotoImage with the same image as this widget."""
-        destImage = PhotoImage()
+        destImage = PhotoImage(master=self.tk)
        self.tk.call(destImage, 'copy', self.name)
        return destImage
    def zoom(self,x,y=''):
        """Return a new PhotoImage with the same image as this widget
        but zoom it with X and Y."""
-        destImage = PhotoImage()
+        destImage = PhotoImage(master=self.tk)
        if y=='': y=x
        self.tk.call(destImage, 'copy', self.name, '-zoom',x,y)
        return destImage
    def subsample(self,x,y=''):
        """Return a new PhotoImage based on the same image as this widget
        but use only every Xth or Yth pixel."""
-        destImage = PhotoImage()
+        destImage = PhotoImage(master=self.tk)
        if y=='': y=x
        self.tk.call(destImage, 'copy', self.name, '-subsample',x,y)
        return destImage

--- a/Lib/tkinter/test/support.py
+++ b/Lib/tkinter/test/support.py
@@ -3,30 +3,43 @@ import tkinter
 import unittest
 from test.support import requires
-def get_tk_root():
+class AbstractTkTest:
-    requires('gui')             # raise exception if tk unavailable
-    try:
-        root = tkinter._default_root
-    except AttributeError:
-        # it is possible to disable default root in Tkinter, although
-        # I haven't seen people doing it (but apparently someone did it
-        # here).
-        root = None
-    if root is None:
+    @classmethod
-        # create a new master only if there isn't one already
+    def setUpClass(cls):
-        root = tkinter.Tk()
+        cls._old_support_default_root = tkinter._support_default_root
+        destroy_default_root()
+        tkinter.NoDefaultRoot()
+        cls.root = tkinter.Tk()
+        cls.wantobjects = cls.root.wantobjects()
+        # De-maximize main window.
+        # Some window managers can maximize new windows.
+        cls.root.wm_state('normal')
+        try:
+            cls.root.wm_attributes('-zoomed', False)
+        except tkinter.TclError:
+            pass
-    return root
+    @classmethod
+    def tearDownClass(cls):
+        cls.root.destroy()
+        cls.root = None
+        tkinter._default_root = None
+        tkinter._support_default_root = cls._old_support_default_root
-def root_deiconify():
+    def setUp(self):
-    root = get_tk_root()
+        self.root.deiconify()
-    root.deiconify()
-def root_withdraw():
+    def tearDown(self):
-    root = get_tk_root()
+        for w in self.root.winfo_children():
-    root.withdraw()
+            w.destroy()
+        self.root.withdraw()
+def destroy_default_root():
+    if getattr(tkinter, '_default_root', None):
+        tkinter._default_root.update_idletasks()
+        tkinter._default_root.destroy()
+        tkinter._default_root = None
 def simulate_mouse_click(widget, x, y):
    """Generate proper events to click at the x, y position (tries to act

--- a/Lib/tkinter/test/test_tkinter/test_font.py
+++ b/Lib/tkinter/test/test_tkinter/test_font.py
@@ -2,26 +2,20 @@ import unittest
 import tkinter
 from tkinter import font
 from test.support import requires, run_unittest
-import tkinter.test.support as support
+from tkinter.test.support import AbstractTkTest
 requires('gui')
-class FontTest(unittest.TestCase):
+class FontTest(AbstractTkTest, unittest.TestCase):
-    def setUp(self):
-        support.root_deiconify()
-    def tearDown(self):
-        support.root_withdraw()
    def test_font_eq(self):
        fontname = "TkDefaultFont"
        try:
-            f = font.Font(name=fontname, exists=True)
+            f = font.Font(root=self.root, name=fontname, exists=True)
        except tkinter._tkinter.TclError:
-            f = font.Font(name=fontname, exists=False)
+            f = font.Font(root=self.root, name=fontname, exists=False)
-        font1 = font.nametofont(fontname)
+        font1 = font.Font(root=self.root, name=fontname, exists=True)
-        font2 = font.nametofont(fontname)
+        font2 = font.Font(root=self.root, name=fontname, exists=True)
        self.assertIsNot(font1, font2)
        self.assertEqual(font1, font2)
        self.assertNotEqual(font1, font1.copy())

--- a/Lib/tkinter/test/test_tkinter/test_geometry_managers.py
+++ b/Lib/tkinter/test/test_tkinter/test_geometry_managers.py
@@ -278,7 +278,7 @@ class PlaceTest(AbstractWidgetTest, unittest.TestCase):
    def create2(self):
        t = tkinter.Toplevel(self.root, width=300, height=200, bd=0)
-        t.wm_geometry('+0+0')
+        t.wm_geometry('300x200+0+0')
        f = tkinter.Frame(t, width=154, height=84, bd=2, relief='raised')
        f.place_configure(x=48, y=38)
        f2 = tkinter.Frame(t, width=30, height=60, bd=2, relief='raised')
@@ -479,7 +479,6 @@ class PlaceTest(AbstractWidgetTest, unittest.TestCase):
 class GridTest(AbstractWidgetTest, unittest.TestCase):
    def tearDown(self):
-        super().tearDown()
        cols, rows = self.root.grid_size()
        for i in range(cols + 1):
            self.root.grid_columnconfigure(i, weight=0, minsize=0, pad=0, uniform='')
@@ -488,10 +487,10 @@ class GridTest(AbstractWidgetTest, unittest.TestCase):
        self.root.grid_propagate(1)
        if tcl_version >= (8, 5):
            self.root.grid_anchor('nw')
+        super().tearDown()
    def test_grid_configure(self):
        b = tkinter.Button(self.root)
-        self.addCleanup(b.destroy)
        self.assertEqual(b.grid_info(), {})
        b.grid_configure()
        self.assertEqual(b.grid_info()['in'], self.root)
@@ -578,7 +577,6 @@ class GridTest(AbstractWidgetTest, unittest.TestCase):
    def test_grid_configure_row(self):
        b = tkinter.Button(self.root)
-        self.addCleanup(b.destroy)
        with self.assertRaisesRegex(TclError, 'bad (row|grid) value "-1": '
                                    'must be a non-negative integer'):
            b.grid_configure(row=-1)
@@ -795,7 +793,7 @@ class GridTest(AbstractWidgetTest, unittest.TestCase):
            self.root.grid_bbox(0, 0, 0, 'x')
        with self.assertRaises(TypeError):
            self.root.grid_bbox(0, 0, 0, 0, 0)
-        t = tkinter.Toplevel(self.root)
+        t = self.root
        # de-maximize
        t.wm_geometry('1x1+0+0')
        t.wm_geometry('')
@@ -823,7 +821,7 @@ class GridTest(AbstractWidgetTest, unittest.TestCase):
            self.root.grid_location('x', 'y')
        with self.assertRaisesRegex(TclError, 'bad screen distance "y"'):
            self.root.grid_location('1c', 'y')
-        t = tkinter.Toplevel(self.root)
+        t = self.root
        # de-maximize
        t.wm_geometry('1x1+0+0')
        t.wm_geometry('')

--- a/Lib/tkinter/test/test_tkinter/test_images.py
+++ b/Lib/tkinter/test/test_tkinter/test_images.py
 import unittest
 import tkinter
-from tkinter import ttk
 from test import support
-from tkinter.test.support import requires_tcl
+from tkinter.test.support import AbstractTkTest, requires_tcl
 support.requires('gui')
-class MiscTest(unittest.TestCase):
+class MiscTest(AbstractTkTest, unittest.TestCase):
-    def setUp(self):
-        self.root = ttk.setup_master()
    def test_image_types(self):
        image_types = self.root.image_types()
@@ -23,15 +19,13 @@ class MiscTest(unittest.TestCase):
        self.assertIsInstance(image_names, tuple)
-class BitmapImageTest(unittest.TestCase):
+class BitmapImageTest(AbstractTkTest, unittest.TestCase):
    @classmethod
    def setUpClass(cls):
+        AbstractTkTest.setUpClass.__func__(cls)
        cls.testfile = support.findfile('python.xbm', subdir='imghdrdata')
-    def setUp(self):
-        self.root = ttk.setup_master()
    def test_create_from_file(self):
        image = tkinter.BitmapImage('::img::test', master=self.root,
                                    foreground='yellow', background='blue',
@@ -107,16 +101,13 @@ class BitmapImageTest(unittest.TestCase):
                         '-foreground {} {} #000000 yellow')
-class PhotoImageTest(unittest.TestCase):
+class PhotoImageTest(AbstractTkTest, unittest.TestCase):
    @classmethod
    def setUpClass(cls):
+        AbstractTkTest.setUpClass.__func__(cls)
        cls.testfile = support.findfile('python.gif', subdir='imghdrdata')
-    def setUp(self):
-        self.root = ttk.setup_master()
-        self.wantobjects = self.root.wantobjects()
    def create(self):
        return tkinter.PhotoImage('::img::test', master=self.root,
                                  file=self.testfile)

--- a/Lib/tkinter/test/test_tkinter/test_misc.py
+++ b/Lib/tkinter/test/test_tkinter/test_misc.py
 import unittest
 import tkinter
-from tkinter import ttk
 from test import support
+from tkinter.test.support import AbstractTkTest
 support.requires('gui')
-class MiscTest(unittest.TestCase):
+class MiscTest(AbstractTkTest, unittest.TestCase):
-    def setUp(self):
-        self.root = ttk.setup_master()
    def test_repr(self):
        t = tkinter.Toplevel(self.root, name='top')

--- a/Lib/tkinter/test/test_tkinter/test_text.py
+++ b/Lib/tkinter/test/test_tkinter/test_text.py
 import unittest
 import tkinter
 from test.support import requires, run_unittest
-from tkinter.ttk import setup_master
+from tkinter.test.support import AbstractTkTest
 requires('gui')
-class TextTest(unittest.TestCase):
+class TextTest(AbstractTkTest, unittest.TestCase):
    def setUp(self):
-        self.root = setup_master()
+        super().setUp()
        self.text = tkinter.Text(self.root)
-    def tearDown(self):
-        self.text.destroy()
    def test_debug(self):
        text = self.text
        olddebug = text.debug()

--- a/Lib/tkinter/test/test_tkinter/test_variables.py
+++ b/Lib/tkinter/test/test_tkinter/test_variables.py
 import unittest
-from tkinter import Variable, StringVar, IntVar, DoubleVar, BooleanVar, Tk
+from tkinter import Variable, StringVar, IntVar, DoubleVar, BooleanVar, Tcl
 class Var(Variable):
@@ -16,10 +16,10 @@ class Var(Variable):
 class TestBase(unittest.TestCase):
    def setUp(self):
-        self.root = Tk()
+        self.root = Tcl()
    def tearDown(self):
-        self.root.destroy()
+        del self.root
 class TestVariable(TestBase):
@@ -81,7 +81,7 @@ class TestVariable(TestBase):
            self.root.setvar(b'var\x00name', "value")
    def test_initialize(self):
-        v = Var()
+        v = Var(self.root)
        self.assertFalse(v.side_effect)
        v.set("value")
        self.assertTrue(v.side_effect)

--- a/Lib/tkinter/test/test_tkinter/test_widgets.py
+++ b/Lib/tkinter/test/test_tkinter/test_widgets.py
@@ -66,7 +66,7 @@ class ToplevelTest(AbstractToplevelTest, unittest.TestCase):
        'takefocus', 'use', 'visual', 'width',
    )
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.Toplevel(self.root, **kwargs)
    def test_menu(self):
@@ -105,7 +105,7 @@ class FrameTest(AbstractToplevelTest, unittest.TestCase):
        'relief', 'takefocus', 'visual', 'width',
    )
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.Frame(self.root, **kwargs)
@@ -120,7 +120,7 @@ class LabelFrameTest(AbstractToplevelTest, unittest.TestCase):
        'takefocus', 'text', 'visual', 'width',
    )
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.LabelFrame(self.root, **kwargs)
    def test_labelanchor(self):
@@ -158,7 +158,7 @@ class LabelTest(AbstractLabelTest, unittest.TestCase):
        'underline', 'width', 'wraplength',
    )
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.Label(self.root, **kwargs)
@@ -175,7 +175,7 @@ class ButtonTest(AbstractLabelTest, unittest.TestCase):
        'state', 'takefocus', 'text', 'textvariable',
        'underline', 'width', 'wraplength')
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.Button(self.root, **kwargs)
    def test_default(self):
@@ -199,7 +199,7 @@ class CheckbuttonTest(AbstractLabelTest, unittest.TestCase):
        'underline', 'variable', 'width', 'wraplength',
    )
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.Checkbutton(self.root, **kwargs)
@@ -227,7 +227,7 @@ class RadiobuttonTest(AbstractLabelTest, unittest.TestCase):
        'underline', 'value', 'variable', 'width', 'wraplength',
    )
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.Radiobutton(self.root, **kwargs)
    def test_value(self):
@@ -250,7 +250,7 @@ class MenubuttonTest(AbstractLabelTest, unittest.TestCase):
    )
    _conv_pixels = staticmethod(pixels_round)
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.Menubutton(self.root, **kwargs)
    def test_direction(self):
@@ -268,7 +268,7 @@ class MenubuttonTest(AbstractLabelTest, unittest.TestCase):
                     'crashes with Cocoa Tk (issue19733)')
    def test_image(self):
        widget = self.create()
-        image = tkinter.PhotoImage('image1')
+        image = tkinter.PhotoImage(master=self.root, name='image1')
        self.checkParam(widget, 'image', image, conv=str)
        errmsg = 'image "spam" doesn\'t exist'
        with self.assertRaises(tkinter.TclError) as cm:
@@ -303,7 +303,7 @@ class MenubuttonTest(AbstractLabelTest, unittest.TestCase):
 class OptionMenuTest(MenubuttonTest, unittest.TestCase):
-    def _create(self, default='b', values=('a', 'b', 'c'), **kwargs):
+    def create(self, default='b', values=('a', 'b', 'c'), **kwargs):
        return tkinter.OptionMenu(self.root, None, default, *values, **kwargs)
@@ -322,7 +322,7 @@ class EntryTest(AbstractWidgetTest, unittest.TestCase):
        'validate', 'validatecommand', 'width', 'xscrollcommand',
    )
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.Entry(self.root, **kwargs)
    def test_disabledbackground(self):
@@ -396,7 +396,7 @@ class SpinboxTest(EntryTest, unittest.TestCase):
        'width', 'wrap', 'xscrollcommand',
    )
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.Spinbox(self.root, **kwargs)
    test_show = None
@@ -490,9 +490,9 @@ class TextTest(AbstractWidgetTest, unittest.TestCase):
        'xscrollcommand', 'yscrollcommand',
    )
    if tcl_version < (8, 5):
-        wantobjects = False
+        _stringify = True
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.Text(self.root, **kwargs)
    def test_autoseparators(self):
@@ -644,9 +644,9 @@ class CanvasTest(AbstractWidgetTest, unittest.TestCase):
    )
    _conv_pixels = round
-    wantobjects = False
+    _stringify = True
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.Canvas(self.root, **kwargs)
    def test_closeenough(self):
@@ -699,7 +699,7 @@ class ListboxTest(AbstractWidgetTest, unittest.TestCase):
        'takefocus', 'width', 'xscrollcommand', 'yscrollcommand',
    )
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.Listbox(self.root, **kwargs)
    def test_activestyle(self):
@@ -709,7 +709,7 @@ class ListboxTest(AbstractWidgetTest, unittest.TestCase):
    def test_listvariable(self):
        widget = self.create()
-        var = tkinter.DoubleVar()
+        var = tkinter.DoubleVar(self.root)
        self.checkVariableParam(widget, 'listvariable', var)
    def test_selectmode(self):
@@ -831,7 +831,7 @@ class ScaleTest(AbstractWidgetTest, unittest.TestCase):
    )
    default_orient = 'vertical'
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.Scale(self.root, **kwargs)
    def test_bigincrement(self):
@@ -897,10 +897,10 @@ class ScrollbarTest(AbstractWidgetTest, unittest.TestCase):
        'takefocus', 'troughcolor', 'width',
    )
    _conv_pixels = round
-    wantobjects = False
+    _stringify = True
    default_orient = 'vertical'
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.Scrollbar(self.root, **kwargs)
    def test_activerelief(self):
@@ -947,7 +947,7 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
    )
    default_orient = 'horizontal'
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.PanedWindow(self.root, **kwargs)
    def test_handlepad(self):
@@ -1105,7 +1105,7 @@ class MenuTest(AbstractWidgetTest, unittest.TestCase):
    )
    _conv_pixels = noconv
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.Menu(self.root, **kwargs)
    def test_postcommand(self):
@@ -1174,7 +1174,7 @@ class MessageTest(AbstractWidgetTest, unittest.TestCase):
    )
    _conv_pad_pixels = noconv
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return tkinter.Message(self.root, **kwargs)
    def test_aspect(self):

--- a/Lib/tkinter/test/test_ttk/test_extensions.py
+++ b/Lib/tkinter/test/test_ttk/test_extensions.py
@@ -2,34 +2,30 @@ import sys
 import unittest
 import tkinter
 from tkinter import ttk
-from test.support import requires, run_unittest
+from test.support import requires, run_unittest, swap_attr
+from tkinter.test.support import AbstractTkTest, destroy_default_root
-import tkinter.test.support as support
 requires('gui')
-class LabeledScaleTest(unittest.TestCase):
+class LabeledScaleTest(AbstractTkTest, unittest.TestCase):
-    def setUp(self):
-        support.root_deiconify()
    def tearDown(self):
-        support.root_withdraw()
+        self.root.update_idletasks()
+        super().tearDown()
    def test_widget_destroy(self):
        # automatically created variable
-        x = ttk.LabeledScale()
+        x = ttk.LabeledScale(self.root)
        var = x._variable._name
        x.destroy()
        self.assertRaises(tkinter.TclError, x.tk.globalgetvar, var)
        # manually created variable
-        myvar = tkinter.DoubleVar()
+        myvar = tkinter.DoubleVar(self.root)
        name = myvar._name
-        x = ttk.LabeledScale(variable=myvar)
+        x = ttk.LabeledScale(self.root, variable=myvar)
        x.destroy()
-        if x.tk.wantobjects():
+        if self.wantobjects:
            self.assertEqual(x.tk.globalgetvar(name), myvar.get())
        else:
            self.assertEqual(float(x.tk.globalgetvar(name)), myvar.get())
@@ -37,26 +33,36 @@ class LabeledScaleTest(unittest.TestCase):
        self.assertRaises(tkinter.TclError, x.tk.globalgetvar, name)
        # checking that the tracing callback is properly removed
-        myvar = tkinter.IntVar()
+        myvar = tkinter.IntVar(self.root)
        # LabeledScale will start tracing myvar
-        x = ttk.LabeledScale(variable=myvar)
+        x = ttk.LabeledScale(self.root, variable=myvar)
        x.destroy()
        # Unless the tracing callback was removed, creating a new
        # LabeledScale with the same var will cause an error now. This
        # happens because the variable will be set to (possibly) a new
        # value which causes the tracing callback to be called and then
        # it tries calling instance attributes not yet defined.
-        ttk.LabeledScale(variable=myvar)
+        ttk.LabeledScale(self.root, variable=myvar)
        if hasattr(sys, 'last_type'):
            self.assertNotEqual(sys.last_type, tkinter.TclError)
+    def test_initialization_no_master(self):
+        # no master passing
+        with swap_attr(tkinter, '_default_root', None), \
+             swap_attr(tkinter, '_support_default_root', True):
+            try:
+                x = ttk.LabeledScale()
+                self.assertIsNotNone(tkinter._default_root)
+                self.assertEqual(x.master, tkinter._default_root)
+                self.assertEqual(x.tk, tkinter._default_root.tk)
+                x.destroy()
+            finally:
+                destroy_default_root()
    def test_initialization(self):
        # master passing
-        x = ttk.LabeledScale()
+        master = tkinter.Frame(self.root)
-        self.assertEqual(x.master, tkinter._default_root)
-        x.destroy()
-        master = tkinter.Frame()
        x = ttk.LabeledScale(master)
        self.assertEqual(x.master, master)
        x.destroy()
@@ -64,25 +70,25 @@ class LabeledScaleTest(unittest.TestCase):
        # variable initialization/passing
        passed_expected = (('0', 0), (0, 0), (10, 10),
            (-1, -1), (sys.maxsize + 1, sys.maxsize + 1))
-        if x.tk.wantobjects():
+        if self.wantobjects:
            passed_expected += ((2.5, 2),)
        for pair in passed_expected:
-            x = ttk.LabeledScale(from_=pair[0])
+            x = ttk.LabeledScale(self.root, from_=pair[0])
            self.assertEqual(x.value, pair[1])
            x.destroy()
-        x = ttk.LabeledScale(from_='2.5')
+        x = ttk.LabeledScale(self.root, from_='2.5')
        self.assertRaises(ValueError, x._variable.get)
        x.destroy()
-        x = ttk.LabeledScale(from_=None)
+        x = ttk.LabeledScale(self.root, from_=None)
        self.assertRaises(ValueError, x._variable.get)
        x.destroy()
        # variable should have its default value set to the from_ value
-        myvar = tkinter.DoubleVar(value=20)
+        myvar = tkinter.DoubleVar(self.root, value=20)
-        x = ttk.LabeledScale(variable=myvar)
+        x = ttk.LabeledScale(self.root, variable=myvar)
        self.assertEqual(x.value, 0)
        x.destroy()
        # check that it is really using a DoubleVar
-        x = ttk.LabeledScale(variable=myvar, from_=0.5)
+        x = ttk.LabeledScale(self.root, variable=myvar, from_=0.5)
        self.assertEqual(x.value, 0.5)
        self.assertEqual(x._variable._name, myvar._name)
        x.destroy()
@@ -91,25 +97,26 @@ class LabeledScaleTest(unittest.TestCase):
        def check_positions(scale, scale_pos, label, label_pos):
            self.assertEqual(scale.pack_info()['side'], scale_pos)
            self.assertEqual(label.place_info()['anchor'], label_pos)
-        x = ttk.LabeledScale(compound='top')
+        x = ttk.LabeledScale(self.root, compound='top')
        check_positions(x.scale, 'bottom', x.label, 'n')
        x.destroy()
-        x = ttk.LabeledScale(compound='bottom')
+        x = ttk.LabeledScale(self.root, compound='bottom')
        check_positions(x.scale, 'top', x.label, 's')
        x.destroy()
-        x = ttk.LabeledScale(compound='unknown') # invert default positions
+        # invert default positions
+        x = ttk.LabeledScale(self.root, compound='unknown')
        check_positions(x.scale, 'top', x.label, 's')
        x.destroy()
-        x = ttk.LabeledScale() # take default positions
+        x = ttk.LabeledScale(self.root) # take default positions
        check_positions(x.scale, 'bottom', x.label, 'n')
        x.destroy()
        # extra, and invalid, kwargs
-        self.assertRaises(tkinter.TclError, ttk.LabeledScale, a='b')
+        self.assertRaises(tkinter.TclError, ttk.LabeledScale, master, a='b')
    def test_horizontal_range(self):
-        lscale = ttk.LabeledScale(from_=0, to=10)
+        lscale = ttk.LabeledScale(self.root, from_=0, to=10)
        lscale.pack()
        lscale.wait_visibility()
        lscale.update()
@@ -128,7 +135,7 @@ class LabeledScaleTest(unittest.TestCase):
        self.assertNotEqual(prev_xcoord, curr_xcoord)
        # the label widget should have been repositioned too
        linfo_2 = lscale.label.place_info()
-        self.assertEqual(lscale.label['text'], 0 if lscale.tk.wantobjects() else '0')
+        self.assertEqual(lscale.label['text'], 0 if self.wantobjects else '0')
        self.assertEqual(curr_xcoord, int(linfo_2['x']))
        # change the range back
        lscale.scale.configure(from_=0, to=10)
@@ -139,7 +146,7 @@ class LabeledScaleTest(unittest.TestCase):
    def test_variable_change(self):
-        x = ttk.LabeledScale()
+        x = ttk.LabeledScale(self.root)
        x.pack()
        x.wait_visibility()
        x.update()
@@ -151,13 +158,13 @@ class LabeledScaleTest(unittest.TestCase):
        # at the same time this shouldn't affect test outcome
        x.update()
        self.assertEqual(x.label['text'],
-                         newval if x.tk.wantobjects() else str(newval))
+                         newval if self.wantobjects else str(newval))
        self.assertGreater(x.scale.coords()[0], curr_xcoord)
        self.assertEqual(x.scale.coords()[0],
            int(x.label.place_info()['x']))
        # value outside range
-        if x.tk.wantobjects():
+        if self.wantobjects:
            conv = lambda x: x
        else:
            conv = int
@@ -171,7 +178,7 @@ class LabeledScaleTest(unittest.TestCase):
    def test_resize(self):
-        x = ttk.LabeledScale()
+        x = ttk.LabeledScale(self.root)
        x.pack(expand=True, fill='both')
        x.wait_visibility()
        x.update()
@@ -190,20 +197,20 @@ class LabeledScaleTest(unittest.TestCase):
        x.destroy()
-class OptionMenuTest(unittest.TestCase):
+class OptionMenuTest(AbstractTkTest, unittest.TestCase):
    def setUp(self):
-        support.root_deiconify()
+        super().setUp()
-        self.textvar = tkinter.StringVar()
+        self.textvar = tkinter.StringVar(self.root)
    def tearDown(self):
        del self.textvar
-        support.root_withdraw()
+        super().tearDown()
    def test_widget_destroy(self):
-        var = tkinter.StringVar()
+        var = tkinter.StringVar(self.root)
-        optmenu = ttk.OptionMenu(None, var)
+        optmenu = ttk.OptionMenu(self.root, var)
        name = var._name
        optmenu.update_idletasks()
        optmenu.destroy()
@@ -214,9 +221,9 @@ class OptionMenuTest(unittest.TestCase):
    def test_initialization(self):
        self.assertRaises(tkinter.TclError,
-            ttk.OptionMenu, None, self.textvar, invalid='thing')
+            ttk.OptionMenu, self.root, self.textvar, invalid='thing')
-        optmenu = ttk.OptionMenu(None, self.textvar, 'b', 'a', 'b')
+        optmenu = ttk.OptionMenu(self.root, self.textvar, 'b', 'a', 'b')
        self.assertEqual(optmenu._variable.get(), 'b')
        self.assertTrue(optmenu['menu'])
@@ -228,7 +235,7 @@ class OptionMenuTest(unittest.TestCase):
    def test_menu(self):
        items = ('a', 'b', 'c')
        default = 'a'
-        optmenu = ttk.OptionMenu(None, self.textvar, default, *items)
+        optmenu = ttk.OptionMenu(self.root, self.textvar, default, *items)
        found_default = False
        for i in range(len(items)):
            value = optmenu['menu'].entrycget(i, 'value')
@@ -240,7 +247,7 @@ class OptionMenuTest(unittest.TestCase):
        # default shouldn't be in menu if it is not part of values
        default = 'd'
-        optmenu = ttk.OptionMenu(None, self.textvar, default, *items)
+        optmenu = ttk.OptionMenu(self.root, self.textvar, default, *items)
        curr = None
        i = 0
        while True:
@@ -269,7 +276,7 @@ class OptionMenuTest(unittest.TestCase):
        def cb_test(item):
            self.assertEqual(item, items[1])
            success.append(True)
-        optmenu = ttk.OptionMenu(None, self.textvar, 'a', command=cb_test,
+        optmenu = ttk.OptionMenu(self.root, self.textvar, 'a', command=cb_test,
            *items)
        optmenu['menu'].invoke(1)
        if not success:

--- a/Lib/tkinter/test/test_ttk/test_style.py
+++ b/Lib/tkinter/test/test_ttk/test_style.py
@@ -2,15 +2,15 @@ import unittest
 import tkinter
 from tkinter import ttk
 from test.support import requires, run_unittest
+from tkinter.test.support import AbstractTkTest
-import tkinter.test.support as support
 requires('gui')
-class StyleTest(unittest.TestCase):
+class StyleTest(AbstractTkTest, unittest.TestCase):
    def setUp(self):
-        self.style = ttk.Style()
+        super().setUp()
+        self.style = ttk.Style(self.root)
    def test_configure(self):
@@ -25,7 +25,7 @@ class StyleTest(unittest.TestCase):
        style = self.style
        style.map('TButton', background=[('active', 'background', 'blue')])
        self.assertEqual(style.map('TButton', 'background'),
-            [('active', 'background', 'blue')] if style.tk.wantobjects() else
+            [('active', 'background', 'blue')] if self.wantobjects else
            [('active background', 'blue')])
        self.assertIsInstance(style.map('TButton'), dict)

--- a/Lib/tkinter/test/test_ttk/test_widgets.py
+++ b/Lib/tkinter/test/test_ttk/test_widgets.py
@@ -4,9 +4,9 @@ from tkinter import ttk
 from test.support import requires
 import sys
-import tkinter.test.support as support
 from tkinter.test.test_ttk.test_functions import MockTclObj
-from tkinter.test.support import tcl_version, get_tk_patchlevel
+from tkinter.test.support import (AbstractTkTest, tcl_version, get_tk_patchlevel,
+                                  simulate_mouse_click)
 from tkinter.test.widget_tests import (add_standard_options, noconv,
    AbstractWidgetTest, StandardOptionsTests, IntegerSizeTests, PixelSizeTests,
    setUpModule)
@@ -53,19 +53,15 @@ class StandardTtkOptionsTests(StandardOptionsTests):
        pass
-class WidgetTest(unittest.TestCase):
+class WidgetTest(AbstractTkTest, unittest.TestCase):
    """Tests methods available in every ttk widget."""
    def setUp(self):
-        support.root_deiconify()
+        super().setUp()
-        self.widget = ttk.Button(width=0, text="Text")
+        self.widget = ttk.Button(self.root, width=0, text="Text")
        self.widget.pack()
        self.widget.wait_visibility()
-    def tearDown(self):
-        self.widget.destroy()
-        support.root_withdraw()
    def test_identify(self):
        self.widget.update_idletasks()
@@ -128,7 +124,7 @@ class FrameTest(AbstractToplevelTest, unittest.TestCase):
        'width',
    )
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return ttk.Frame(self.root, **kwargs)
@@ -141,7 +137,7 @@ class LabelFrameTest(AbstractToplevelTest, unittest.TestCase):
        'text', 'underline', 'width',
    )
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return ttk.LabelFrame(self.root, **kwargs)
    def test_labelanchor(self):
@@ -161,8 +157,8 @@ class LabelFrameTest(AbstractToplevelTest, unittest.TestCase):
 class AbstractLabelTest(AbstractWidgetTest):
    def checkImageParam(self, widget, name):
-        image = tkinter.PhotoImage('image1')
+        image = tkinter.PhotoImage(master=self.root, name='image1')
-        image2 = tkinter.PhotoImage('image2')
+        image2 = tkinter.PhotoImage(master=self.root, name='image2')
        self.checkParam(widget, name, image, expected=('image1',))
        self.checkParam(widget, name, 'image1', expected=('image1',))
        self.checkParam(widget, name, (image,), expected=('image1',))
@@ -199,7 +195,7 @@ class LabelTest(AbstractLabelTest, unittest.TestCase):
    )
    _conv_pixels = noconv
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return ttk.Label(self.root, **kwargs)
    def test_font(self):
@@ -216,7 +212,7 @@ class ButtonTest(AbstractLabelTest, unittest.TestCase):
        'underline', 'width',
    )
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return ttk.Button(self.root, **kwargs)
    def test_default(self):
@@ -225,7 +221,7 @@ class ButtonTest(AbstractLabelTest, unittest.TestCase):
    def test_invoke(self):
        success = []
-        btn = ttk.Button(command=lambda: success.append(1))
+        btn = ttk.Button(self.root, command=lambda: success.append(1))
        btn.invoke()
        self.assertTrue(success)
@@ -241,7 +237,7 @@ class CheckbuttonTest(AbstractLabelTest, unittest.TestCase):
        'underline', 'variable', 'width',
    )
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return ttk.Checkbutton(self.root, **kwargs)
    def test_offvalue(self):
@@ -258,7 +254,7 @@ class CheckbuttonTest(AbstractLabelTest, unittest.TestCase):
            success.append(1)
            return "cb test called"
-        cbtn = ttk.Checkbutton(command=cb_test)
+        cbtn = ttk.Checkbutton(self.root, command=cb_test)
        # the variable automatically created by ttk.Checkbutton is actually
        # undefined till we invoke the Checkbutton
        self.assertEqual(cbtn.state(), ('alternate', ))
@@ -289,15 +285,9 @@ class ComboboxTest(AbstractWidgetTest, unittest.TestCase):
    def setUp(self):
        super().setUp()
-        support.root_deiconify()
        self.combo = self.create()
-    def tearDown(self):
+    def create(self, **kwargs):
-        self.combo.destroy()
-        support.root_withdraw()
-        super().tearDown()
-    def _create(self, **kwargs):
        return ttk.Combobox(self.root, **kwargs)
    def test_height(self):
@@ -405,7 +395,7 @@ class ComboboxTest(AbstractWidgetTest, unittest.TestCase):
        self.assertRaises(tkinter.TclError, self.combo.current, '')
        # testing creating combobox with empty string in values
-        combo2 = ttk.Combobox(values=[1, 2, ''])
+        combo2 = ttk.Combobox(self.root, values=[1, 2, ''])
        self.assertEqual(combo2['values'],
                         ('1', '2', '') if self.wantobjects else '1 2 {}')
        combo2.destroy()
@@ -423,15 +413,9 @@ class EntryTest(AbstractWidgetTest, unittest.TestCase):
    def setUp(self):
        super().setUp()
-        support.root_deiconify()
        self.entry = self.create()
-    def tearDown(self):
+    def create(self, **kwargs):
-        self.entry.destroy()
-        support.root_withdraw()
-        super().tearDown()
-    def _create(self, **kwargs):
        return ttk.Entry(self.root, **kwargs)
    def test_invalidcommand(self):
@@ -558,15 +542,9 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
    def setUp(self):
        super().setUp()
-        support.root_deiconify()
        self.paned = self.create()
-    def tearDown(self):
+    def create(self, **kwargs):
-        self.paned.destroy()
-        support.root_withdraw()
-        super().tearDown()
-    def _create(self, **kwargs):
        return ttk.PanedWindow(self.root, **kwargs)
    def test_orient(self):
@@ -588,13 +566,13 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
        label.destroy()
        child.destroy()
        # another attempt
-        label = ttk.Label()
+        label = ttk.Label(self.root)
        child = ttk.Label(label)
        self.assertRaises(tkinter.TclError, self.paned.add, child)
        child.destroy()
        label.destroy()
-        good_child = ttk.Label()
+        good_child = ttk.Label(self.root)
        self.paned.add(good_child)
        # re-adding a child is not accepted
        self.assertRaises(tkinter.TclError, self.paned.add, good_child)
@@ -612,7 +590,7 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
        self.assertRaises(tkinter.TclError, self.paned.forget, None)
        self.assertRaises(tkinter.TclError, self.paned.forget, 0)
-        self.paned.add(ttk.Label())
+        self.paned.add(ttk.Label(self.root))
        self.paned.forget(0)
        self.assertRaises(tkinter.TclError, self.paned.forget, 0)
@@ -622,9 +600,9 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
        self.assertRaises(tkinter.TclError, self.paned.insert, 0, None)
        self.assertRaises(tkinter.TclError, self.paned.insert, 0, 0)
-        child = ttk.Label()
+        child = ttk.Label(self.root)
-        child2 = ttk.Label()
+        child2 = ttk.Label(self.root)
-        child3 = ttk.Label()
+        child3 = ttk.Label(self.root)
        self.assertRaises(tkinter.TclError, self.paned.insert, 0, child)
@@ -655,7 +633,7 @@ class PanedWindowTest(AbstractWidgetTest, unittest.TestCase):
    def test_pane(self):
        self.assertRaises(tkinter.TclError, self.paned.pane, 0)
-        child = ttk.Label()
+        child = ttk.Label(self.root)
        self.paned.add(child)
        self.assertIsInstance(self.paned.pane(0), dict)
        self.assertEqual(self.paned.pane(0, weight=None),
@@ -700,7 +678,7 @@ class RadiobuttonTest(AbstractLabelTest, unittest.TestCase):
        'underline', 'value', 'variable', 'width',
    )
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return ttk.Radiobutton(self.root, **kwargs)
    def test_value(self):
@@ -713,9 +691,11 @@ class RadiobuttonTest(AbstractLabelTest, unittest.TestCase):
            success.append(1)
            return "cb test called"
-        myvar = tkinter.IntVar()
+        myvar = tkinter.IntVar(self.root)
-        cbtn = ttk.Radiobutton(command=cb_test, variable=myvar, value=0)
+        cbtn = ttk.Radiobutton(self.root, command=cb_test,
-        cbtn2 = ttk.Radiobutton(command=cb_test, variable=myvar, value=1)
+                               variable=myvar, value=0)
+        cbtn2 = ttk.Radiobutton(self.root, command=cb_test,
+                                variable=myvar, value=1)
        if self.wantobjects:
            conv = lambda x: x
@@ -748,7 +728,7 @@ class MenubuttonTest(AbstractLabelTest, unittest.TestCase):
        'underline', 'width',
    )
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return ttk.Menubutton(self.root, **kwargs)
    def test_direction(self):
@@ -774,17 +754,11 @@ class ScaleTest(AbstractWidgetTest, unittest.TestCase):
    def setUp(self):
        super().setUp()
-        support.root_deiconify()
        self.scale = self.create()
        self.scale.pack()
        self.scale.update()
-    def tearDown(self):
+    def create(self, **kwargs):
-        self.scale.destroy()
-        support.root_withdraw()
-        super().tearDown()
-    def _create(self, **kwargs):
        return ttk.Scale(self.root, **kwargs)
    def test_from(self):
@@ -856,7 +830,7 @@ class ScaleTest(AbstractWidgetTest, unittest.TestCase):
        self.assertEqual(conv(self.scale.get()), min)
        # changing directly the variable doesn't impose this limitation tho
-        var = tkinter.DoubleVar()
+        var = tkinter.DoubleVar(self.root)
        self.scale['variable'] = var
        var.set(max + 5)
        self.assertEqual(conv(self.scale.get()), var.get())
@@ -886,7 +860,7 @@ class ProgressbarTest(AbstractWidgetTest, unittest.TestCase):
    _conv_pixels = noconv
    default_orient = 'horizontal'
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return ttk.Progressbar(self.root, **kwargs)
    def test_length(self):
@@ -920,7 +894,7 @@ class ScrollbarTest(AbstractWidgetTest, unittest.TestCase):
    )
    default_orient = 'vertical'
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return ttk.Scrollbar(self.root, **kwargs)
@@ -932,21 +906,13 @@ class NotebookTest(AbstractWidgetTest, unittest.TestCase):
    def setUp(self):
        super().setUp()
-        support.root_deiconify()
        self.nb = self.create(padding=0)
-        self.child1 = ttk.Label()
+        self.child1 = ttk.Label(self.root)
-        self.child2 = ttk.Label()
+        self.child2 = ttk.Label(self.root)
        self.nb.add(self.child1, text='a')
        self.nb.add(self.child2, text='b')
-    def tearDown(self):
+    def create(self, **kwargs):
-        self.child1.destroy()
-        self.child2.destroy()
-        self.nb.destroy()
-        support.root_withdraw()
-        super().tearDown()
-    def _create(self, **kwargs):
        return ttk.Notebook(self.root, **kwargs)
    def test_tab_identifiers(self):
@@ -985,7 +951,7 @@ class NotebookTest(AbstractWidgetTest, unittest.TestCase):
        self.assertRaises(tkinter.TclError, self.nb.hide, 'hi')
        self.assertRaises(tkinter.TclError, self.nb.hide, None)
        self.assertRaises(tkinter.TclError, self.nb.add, None)
-        self.assertRaises(tkinter.TclError, self.nb.add, ttk.Label(),
+        self.assertRaises(tkinter.TclError, self.nb.add, ttk.Label(self.root),
            unknown='option')
        tabs = self.nb.tabs()
@@ -993,7 +959,7 @@ class NotebookTest(AbstractWidgetTest, unittest.TestCase):
        self.nb.add(self.child1)
        self.assertEqual(self.nb.tabs(), tabs)
-        child = ttk.Label()
+        child = ttk.Label(self.root)
        self.nb.add(child, text='c')
        tabs = self.nb.tabs()
@@ -1051,7 +1017,7 @@ class NotebookTest(AbstractWidgetTest, unittest.TestCase):
        self.assertRaises(tkinter.TclError, self.nb.insert, -1, tabs[0])
        # new tab
-        child3 = ttk.Label()
+        child3 = ttk.Label(self.root)
        self.nb.insert(1, child3)
        self.assertEqual(self.nb.tabs(), (tabs[0], str(child3), tabs[1]))
        self.nb.forget(child3)
@@ -1117,7 +1083,7 @@ class NotebookTest(AbstractWidgetTest, unittest.TestCase):
        self.nb.select(0)
-        support.simulate_mouse_click(self.nb, 5, 5)
+        simulate_mouse_click(self.nb, 5, 5)
        self.nb.focus_force()
        self.nb.event_generate('<Control-Tab>')
        self.assertEqual(self.nb.select(), str(self.child2))
@@ -1131,7 +1097,7 @@ class NotebookTest(AbstractWidgetTest, unittest.TestCase):
        self.nb.tab(self.child1, text='a', underline=0)
        self.nb.enable_traversal()
        self.nb.focus_force()
-        support.simulate_mouse_click(self.nb, 5, 5)
+        simulate_mouse_click(self.nb, 5, 5)
        if sys.platform == 'darwin':
            self.nb.event_generate('<Option-a>')
        else:
@@ -1149,15 +1115,9 @@ class TreeviewTest(AbstractWidgetTest, unittest.TestCase):
    def setUp(self):
        super().setUp()
-        support.root_deiconify()
        self.tv = self.create(padding=0)
-    def tearDown(self):
+    def create(self, **kwargs):
-        self.tv.destroy()
-        support.root_withdraw()
-        super().tearDown()
-    def _create(self, **kwargs):
        return ttk.Treeview(self.root, **kwargs)
    def test_columns(self):
@@ -1393,7 +1353,7 @@ class TreeviewTest(AbstractWidgetTest, unittest.TestCase):
    def test_heading_callback(self):
        def simulate_heading_click(x, y):
-            support.simulate_mouse_click(self.tv, x, y)
+            simulate_mouse_click(self.tv, x, y)
            self.tv.update()
        success = [] # no success for now
@@ -1582,7 +1542,7 @@ class TreeviewTest(AbstractWidgetTest, unittest.TestCase):
        self.assertEqual(len(pos_y), 2) # item1 and item2 y pos
        for y in pos_y:
-            support.simulate_mouse_click(self.tv, 0, y)
+            simulate_mouse_click(self.tv, 0, y)
        # by now there should be 4 things in the events list, since each
        # item had a bind for two events that were simulated above
@@ -1612,7 +1572,7 @@ class SeparatorTest(AbstractWidgetTest, unittest.TestCase):
    )
    default_orient = 'horizontal'
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return ttk.Separator(self.root, **kwargs)
@@ -1623,7 +1583,7 @@ class SizegripTest(AbstractWidgetTest, unittest.TestCase):
        # 'state'?
    )
-    def _create(self, **kwargs):
+    def create(self, **kwargs):
        return ttk.Sizegrip(self.root, **kwargs)
 tests_gui = (

--- a/Lib/tkinter/test/widget_tests.py
+++ b/Lib/tkinter/test/widget_tests.py
@@ -3,9 +3,9 @@
 import unittest
 import sys
 import tkinter
-from tkinter.ttk import setup_master, Scale
+from tkinter.ttk import Scale
-from tkinter.test.support import (tcl_version, requires_tcl, get_tk_patchlevel,
+from tkinter.test.support import (AbstractTkTest, tcl_version, requires_tcl,
-                                  pixels_conv, tcl_obj_eq)
+                                  get_tk_patchlevel, pixels_conv, tcl_obj_eq)
 import test.support
@@ -22,33 +22,26 @@ if get_tk_patchlevel()[:3] == (8, 5, 11):
 _sentinel = object()
-class AbstractWidgetTest:
+class AbstractWidgetTest(AbstractTkTest):
    _conv_pixels = staticmethod(pixels_round)
    _conv_pad_pixels = None
-    wantobjects = True
+    _stringify = False
-    def setUp(self):
+    @property
-        self.root = setup_master()
+    def scaling(self):
-        self.scaling = float(self.root.call('tk', 'scaling'))
+        try:
-        if not self.root.wantobjects():
+            return self._scaling
-            self.wantobjects = False
+        except AttributeError:
+            self._scaling = float(self.root.call('tk', 'scaling'))
-    def tearDown(self):
+            return self._scaling
-        for w in self.root.winfo_children():
-            w.destroy()
    def _str(self, value):
-        if self.wantobjects and tcl_version >= (8, 6):
+        if not self._stringify and self.wantobjects and tcl_version >= (8, 6):
            return value
        if isinstance(value, tuple):
            return ' '.join(map(self._str, value))
        return str(value)
-    def create(self, **kwargs):
-        widget = self._create(**kwargs)
-        self.addCleanup(widget.destroy)
-        return widget
    def assertEqual2(self, actual, expected, msg=None, eq=object.__eq__):
        if eq(actual, expected):
            return
@@ -61,7 +54,7 @@ class AbstractWidgetTest:
            expected = value
        if conv:
            expected = conv(expected)
-        if not self.wantobjects:
+        if self._stringify or not self.wantobjects:
            if isinstance(expected, tuple):
                expected = tkinter._join(expected)
            else:
@@ -193,7 +186,7 @@ class AbstractWidgetTest:
                errmsg=errmsg)
    def checkImageParam(self, widget, name):
-        image = tkinter.PhotoImage('image1')
+        image = tkinter.PhotoImage(master=self.root, name='image1')
        self.checkParam(widget, name, image, conv=str)
        self.checkInvalidParam(widget, name, 'spam',
                errmsg='image "spam" doesn\'t exist')
@@ -414,7 +407,7 @@ class StandardOptionsTests:
    def test_textvariable(self):
        widget = self.create()
-        var = tkinter.StringVar()
+        var = tkinter.StringVar(self.root)
        self.checkVariableParam(widget, 'textvariable', var)
    def test_troughcolor(self):
@@ -475,7 +468,7 @@ class StandardOptionsTests:
    def test_variable(self):
        widget = self.create()
-        var = tkinter.DoubleVar()
+        var = tkinter.DoubleVar(self.root)
        self.checkVariableParam(widget, 'variable', var)

--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -124,6 +124,8 @@ Core and Builtins
 Library
 -------
+- Issue #22236: Fixed Tkinter images copying operations in NoDefaultRoot mode.
 - Issue #2527: Add a *globals* argument to timeit functions, in order to
  override the globals namespace in which the timed code is executed.
  Patch by Ben Roberts.
@@ -418,6 +420,9 @@ Library
 - Issue #21525: Most Tkinter methods which accepted tuples now accept lists too.
+- Issue #22236: Tkinter tests now don't reuse default root window.  New root
+  window is created for every test class.
 - Issue #10744: Fix PEP 3118 format strings on ctypes objects with a nontrivial
  shape.