python · serhiy-storchaka · Jan 16, 2026 · Jan 8, 2026 · Jan 8, 2026
diff --git a/Lib/test/libregrtest/cmdline.py b/Lib/test/libregrtest/cmdline.py
@@ -134,6 +134,9 @@
  and 3.9 to test backwards compatibility. These tests
  may take very long to complete.
 
+ wantobjects - Allows to run Tkinter tests with the specified value of
+ tkinter.wantobjects.
+
 To enable all resources except one, use '-uall,-<resource>'. For
 example, to run all the tests except for the gui tests, give the
 option '-uall,-gui'.

diff --git a/Lib/test/libregrtest/utils.py b/Lib/test/libregrtest/utils.py
@@ -41,7 +41,7 @@
 # - tzdata: while needed to validate fully test_datetime, it makes
 # test_datetime too slow (15-20 min on some buildbots) and so is disabled by
 # default (see bpo-30822).
-RESOURCE_NAMES=ALL_RESOURCES+ ('extralargefile', 'tzdata', 'xpickle')
+RESOURCE_NAMES=ALL_RESOURCES+ ('extralargefile', 'tzdata', 'xpickle', 'wantobjects')
 
 
 # Types for types hints

diff --git a/Lib/test/test_tcl.py b/Lib/test/test_tcl.py
@@ -817,6 +817,10 @@ def test_huge_string_builtins2(self, size):
 
 
 defsetUpModule():
+wantobjects=support.get_resource_value('wantobjects')
+ifwantobjectsisnotNone:
+unittest.enterModuleContext(
+support.swap_attr(tkinter, 'wantobjects', int(wantobjects)))
 ifsupport.verbose:
 tcl=Tcl()
 print('patchlevel =', tcl.call('info', 'patchlevel'), flush=True)

diff --git a/Lib/test/test_tkinter/__init__.py b/Lib/test/test_tkinter/__init__.py
@@ -22,3 +22,9 @@
 
 defload_tests(*args):
 returnload_package_tests(os.path.dirname(__file__), *args)
+
+defsetUpModule():
+wantobjects=support.get_resource_value('wantobjects')
+ifwantobjectsisnotNone:
+unittest.enterModuleContext(
+support.swap_attr(tkinter, 'wantobjects', int(wantobjects)))
diff --git a/Lib/test/test_tkinter/support.py b/Lib/test/test_tkinter/support.py
@@ -1,5 +1,14 @@
 import functools
 import tkinter
+import unittest
+from test import support
+
+
+def setUpModule():
+ wantobjects = support.get_resource_value('wantobjects')
+ if wantobjects is not None:
+ unittest.enterModuleContext(
+ support.swap_attr(tkinter, 'wantobjects', int(wantobjects)))
 
 class AbstractTkTest:
 
@@ -10,6 +19,8 @@ def setUpClass(cls):
  tkinter.NoDefaultRoot()
  cls.root = tkinter.Tk()
  cls.wantobjects = cls.root.wantobjects()
+ if support.is_resource_enabled('wantobjects'):
+ assert cls.wantobjects == int(support.get_resource_value('wantobjects'))
  # De-maximize main window.
  # Some window managers can maximize new windows.
  cls.root.wm_state('normal')

diff --git a/Lib/test/test_tkinter/test_colorchooser.py b/Lib/test/test_tkinter/test_colorchooser.py
@@ -1,6 +1,7 @@
 importunittest
 importtkinter
 fromtest.supportimportrequires, swap_attr
+fromtest.test_tkinter.supportimportsetUpModule# noqa: F401
 fromtest.test_tkinter.supportimportAbstractDefaultRootTest, AbstractTkTest
 fromtkinterimportcolorchooser
 fromtkinter.colorchooserimportaskcolor

diff --git a/Lib/test/test_tkinter/test_font.py b/Lib/test/test_tkinter/test_font.py
@@ -3,6 +3,7 @@
 importtkinter
 fromtkinterimportfont
 fromtest.supportimportrequires, gc_collect, ALWAYS_EQ
+fromtest.test_tkinter.supportimportsetUpModule# noqa: F401
 fromtest.test_tkinter.supportimportAbstractTkTest, AbstractDefaultRootTest
 
 requires('gui')

diff --git a/Lib/test/test_tkinter/test_geometry_managers.py b/Lib/test/test_tkinter/test_geometry_managers.py
@@ -4,6 +4,7 @@
 fromtkinterimportTclError
 fromtest.supportimportrequires
 
+fromtest.test_tkinter.supportimportsetUpModule# noqa: F401
 fromtest.test_tkinter.supportimportpixels_conv
 fromtest.test_tkinter.widget_testsimportAbstractWidgetTest
 

diff --git a/Lib/test/test_tkinter/test_images.py b/Lib/test/test_tkinter/test_images.py
@@ -3,6 +3,7 @@
 importtkinter
 fromtestimportsupport
 fromtest.supportimportos_helper
+fromtest.test_tkinter.supportimportsetUpModule# noqa: F401
 fromtest.test_tkinter.supportimportAbstractTkTest, AbstractDefaultRootTest, requires_tk
 
 support.requires('gui')

diff --git a/Lib/test/test_tkinter/test_loadtk.py b/Lib/test/test_tkinter/test_loadtk.py
@@ -3,6 +3,7 @@
 importunittest
 importtest.supportastest_support
 fromtest.supportimportos_helper
+fromtest.test_tkinter.supportimportsetUpModule# noqa: F401
 fromtkinterimportTcl, TclError
 
 test_support.requires('gui')

diff --git a/Lib/test/test_tkinter/test_messagebox.py b/Lib/test/test_tkinter/test_messagebox.py
@@ -1,6 +1,7 @@
 importunittest
 importtkinter
 fromtest.supportimportrequires, swap_attr
+fromtest.test_tkinter.supportimportsetUpModule# noqa: F401
 fromtest.test_tkinter.supportimportAbstractDefaultRootTest
 fromtkinter.commondialogimportDialog
 fromtkinter.messageboximportshowinfo

diff --git a/Lib/test/test_tkinter/test_misc.py b/Lib/test/test_tkinter/test_misc.py
@@ -5,6 +5,7 @@
 fromtkinterimportTclError
 importenum
 fromtestimportsupport
+fromtest.test_tkinter.supportimportsetUpModule# noqa: F401
 fromtest.test_tkinter.supportimport (AbstractTkTest, AbstractDefaultRootTest,
 requires_tk, get_tk_patchlevel)
 

diff --git a/Lib/test/test_tkinter/test_simpledialog.py b/Lib/test/test_tkinter/test_simpledialog.py
@@ -1,6 +1,7 @@
 importunittest
 importtkinter
 fromtest.supportimportrequires, swap_attr
+fromtest.test_tkinter.supportimportsetUpModule# noqa: F401
 fromtest.test_tkinter.supportimportAbstractDefaultRootTest
 fromtkinter.simpledialogimportDialog, askinteger
 

diff --git a/Lib/test/test_tkinter/test_text.py b/Lib/test/test_tkinter/test_text.py
@@ -1,6 +1,7 @@
 import unittest
 import tkinter
 from test.support import requires
+from test.test_tkinter.support import setUpModule # noqa: F401
 from test.test_tkinter.support import AbstractTkTest
 
 requires('gui')

diff --git a/Lib/test/test_tkinter/test_variables.py b/Lib/test/test_tkinter/test_variables.py
@@ -6,6 +6,7 @@
 fromtkinterimport (Variable, StringVar, IntVar, DoubleVar, BooleanVar, Tcl,
 TclError)
 fromtest.supportimportALWAYS_EQ
+fromtest.test_tkinter.supportimportsetUpModule# noqa: F401
 fromtest.test_tkinter.supportimportAbstractDefaultRootTest, tcl_version
 
 

diff --git a/Lib/test/test_tkinter/test_widgets.py b/Lib/test/test_tkinter/test_widgets.py
@@ -4,6 +4,7 @@
 importos
 fromtest.supportimportrequires
 
+fromtest.test_tkinter.supportimportsetUpModule# noqa: F401
 fromtest.test_tkinter.supportimport (requires_tk, tk_version,
 get_tk_patchlevel, widget_eq,
 AbstractDefaultRootTest)

diff --git a/Lib/test/test_ttk/__init__.py b/Lib/test/test_ttk/__init__.py
@@ -30,6 +30,10 @@ def test_deprecated__version__(self):
 
 
 defsetUpModule():
+wantobjects=support.get_resource_value('wantobjects')
+ifwantobjectsisnotNone:
+unittest.enterModuleContext(
+support.swap_attr(tkinter, 'wantobjects', int(wantobjects)))
 root=None
 try:
 root=tkinter.Tk()

diff --git a/Lib/test/test_ttk/test_extensions.py b/Lib/test/test_ttk/test_extensions.py
@@ -3,6 +3,7 @@
 importtkinter
 fromtkinterimportttk
 fromtest.supportimportrequires, gc_collect
+fromtest.test_tkinter.supportimportsetUpModule# noqa: F401
 fromtest.test_tkinter.supportimportAbstractTkTest, AbstractDefaultRootTest
 
 requires('gui')

diff --git a/Lib/test/test_ttk/test_style.py b/Lib/test/test_ttk/test_style.py
@@ -5,6 +5,7 @@
 fromtkinterimportTclError
 fromtestimportsupport
 fromtest.supportimportrequires
+fromtest.test_tkinter.supportimportsetUpModule# noqa: F401
 fromtest.test_tkinter.supportimportAbstractTkTest, get_tk_patchlevel
 
 requires('gui')

diff --git a/Lib/test/test_ttk/test_widgets.py b/Lib/test/test_ttk/test_widgets.py
@@ -5,6 +5,7 @@
 importsys
 
 fromtest.test_ttk_textonlyimportMockTclObj
+fromtest.test_tkinter.supportimportsetUpModule# noqa: F401
 fromtest.test_tkinter.supportimport (
 AbstractTkTest, requires_tk, tk_version, get_tk_patchlevel,
 simulate_mouse_click, AbstractDefaultRootTest)

diff --git a/Misc/NEWS.d/next/Tests/2026-01-08-16-56-59.gh-issue-65784.aKNo1U.rst b/Misc/NEWS.d/next/Tests/2026-01-08-16-56-59.gh-issue-65784.aKNo1U.rst
@@ -0,0 +1,3 @@
+Add support for parametrized resource ``wantobjects`` in regrtests,
+which allows to run Tkinter tests with the specified value of
+:data:`!tkinter.wantobjects`, for example ``-u wantobjects=0``.