diff --git a/Lib/test/libregrtest/cmdline.py b/Lib/test/libregrtest/cmdline.py
index d784506703461b..2c404f6d80bcf3 100644
--- 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
index 4479f336b1ee53..3bbc3fa127abb3 100644
--- 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
index ef281f6d1fe53a..47450d3fd5976f 100644
--- a/Lib/test/test_tcl.py
+++ b/Lib/test/test_tcl.py
@@ -817,6 +817,10 @@ def test_huge_string_builtins2(self, size):
 
 
 def setUpModule():
+    wantobjects = support.get_resource_value('wantobjects')
+    if wantobjects is not None:
+        unittest.enterModuleContext(
+            support.swap_attr(tkinter, 'wantobjects', int(wantobjects)))
     if support.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
index aa196c12c804ac..62890c705a6ca6 100644
--- a/Lib/test/test_tkinter/__init__.py
+++ b/Lib/test/test_tkinter/__init__.py
@@ -22,3 +22,9 @@
 
 def load_tests(*args):
     return load_package_tests(os.path.dirname(__file__), *args)
+
+def setUpModule():
+    wantobjects = support.get_resource_value('wantobjects')
+    if wantobjects is not None:
+        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
index 46b01e6f131290..7fb0b217fd24ec 100644
--- 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
index 9bba21392d8d14..8a7e97f207a41f 100644
--- a/Lib/test/test_tkinter/test_colorchooser.py
+++ b/Lib/test/test_tkinter/test_colorchooser.py
@@ -1,6 +1,7 @@
 import unittest
 import tkinter
 from test.support import requires, swap_attr
+from test.test_tkinter.support import setUpModule  # noqa: F401
 from test.test_tkinter.support import AbstractDefaultRootTest, AbstractTkTest
 from tkinter import colorchooser
 from tkinter.colorchooser import askcolor
diff --git a/Lib/test/test_tkinter/test_font.py b/Lib/test/test_tkinter/test_font.py
index fc50f9fdbb588c..ee147710fbfc85 100644
--- a/Lib/test/test_tkinter/test_font.py
+++ b/Lib/test/test_tkinter/test_font.py
@@ -3,6 +3,7 @@
 import tkinter
 from tkinter import font
 from test.support import requires, gc_collect, ALWAYS_EQ
+from test.test_tkinter.support import setUpModule  # noqa: F401
 from test.test_tkinter.support import AbstractTkTest, AbstractDefaultRootTest
 
 requires('gui')
diff --git a/Lib/test/test_tkinter/test_geometry_managers.py b/Lib/test/test_tkinter/test_geometry_managers.py
index d71a634a767310..b2ce143ff0948f 100644
--- a/Lib/test/test_tkinter/test_geometry_managers.py
+++ b/Lib/test/test_tkinter/test_geometry_managers.py
@@ -4,6 +4,7 @@
 from tkinter import TclError
 from test.support import requires
 
+from test.test_tkinter.support import setUpModule  # noqa: F401
 from test.test_tkinter.support import pixels_conv
 from test.test_tkinter.widget_tests import AbstractWidgetTest
 
diff --git a/Lib/test/test_tkinter/test_images.py b/Lib/test/test_tkinter/test_images.py
index 358a18beee2571..3aca9515a33b24 100644
--- a/Lib/test/test_tkinter/test_images.py
+++ b/Lib/test/test_tkinter/test_images.py
@@ -3,6 +3,7 @@
 import tkinter
 from test import support
 from test.support import os_helper
+from test.test_tkinter.support import setUpModule  # noqa: F401
 from test.test_tkinter.support import AbstractTkTest, AbstractDefaultRootTest, requires_tk
 
 support.requires('gui')
diff --git a/Lib/test/test_tkinter/test_loadtk.py b/Lib/test/test_tkinter/test_loadtk.py
index 61b0eda2fc750a..7cff654621eb35 100644
--- a/Lib/test/test_tkinter/test_loadtk.py
+++ b/Lib/test/test_tkinter/test_loadtk.py
@@ -3,6 +3,7 @@
 import unittest
 import test.support as test_support
 from test.support import os_helper
+from test.test_tkinter.support import setUpModule  # noqa: F401
 from tkinter import Tcl, TclError
 
 test_support.requires('gui')
diff --git a/Lib/test/test_tkinter/test_messagebox.py b/Lib/test/test_tkinter/test_messagebox.py
index f41bdc98286283..f29f0c7ba59086 100644
--- a/Lib/test/test_tkinter/test_messagebox.py
+++ b/Lib/test/test_tkinter/test_messagebox.py
@@ -1,6 +1,7 @@
 import unittest
 import tkinter
 from test.support import requires, swap_attr
+from test.test_tkinter.support import setUpModule  # noqa: F401
 from test.test_tkinter.support import AbstractDefaultRootTest
 from tkinter.commondialog import Dialog
 from tkinter.messagebox import showinfo
diff --git a/Lib/test/test_tkinter/test_misc.py b/Lib/test/test_tkinter/test_misc.py
index 32e2329506e7ff..a6ba55b3fcadb3 100644
--- a/Lib/test/test_tkinter/test_misc.py
+++ b/Lib/test/test_tkinter/test_misc.py
@@ -5,6 +5,7 @@
 from tkinter import TclError
 import enum
 from test import support
+from test.test_tkinter.support import setUpModule  # noqa: F401
 from test.test_tkinter.support import (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
index 502f7f7098a322..313ad82e0a2c0d 100644
--- a/Lib/test/test_tkinter/test_simpledialog.py
+++ b/Lib/test/test_tkinter/test_simpledialog.py
@@ -1,6 +1,7 @@
 import unittest
 import tkinter
 from test.support import requires, swap_attr
+from test.test_tkinter.support import setUpModule  # noqa: F401
 from test.test_tkinter.support import AbstractDefaultRootTest
 from tkinter.simpledialog import Dialog, askinteger
 
diff --git a/Lib/test/test_tkinter/test_text.py b/Lib/test/test_tkinter/test_text.py
index d579cca95ee2bb..453a4505a0a4da 100644
--- 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
index 75b3a6934fc0e3..8733095ffb65f4 100644
--- a/Lib/test/test_tkinter/test_variables.py
+++ b/Lib/test/test_tkinter/test_variables.py
@@ -6,6 +6,7 @@
 from tkinter import (Variable, StringVar, IntVar, DoubleVar, BooleanVar, Tcl,
                      TclError)
 from test.support import ALWAYS_EQ
+from test.test_tkinter.support import setUpModule  # noqa: F401
 from test.test_tkinter.support import AbstractDefaultRootTest, tcl_version
 
 
diff --git a/Lib/test/test_tkinter/test_widgets.py b/Lib/test/test_tkinter/test_widgets.py
index 20e385ad0b660c..f3579a23afc539 100644
--- a/Lib/test/test_tkinter/test_widgets.py
+++ b/Lib/test/test_tkinter/test_widgets.py
@@ -4,6 +4,7 @@
 import os
 from test.support import requires
 
+from test.test_tkinter.support import setUpModule  # noqa: F401
 from test.test_tkinter.support import (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
index 4a077a0f966fbb..7a47f44ca38221 100644
--- a/Lib/test/test_ttk/__init__.py
+++ b/Lib/test/test_ttk/__init__.py
@@ -30,6 +30,10 @@ def test_deprecated__version__(self):
 
 
 def setUpModule():
+    wantobjects = support.get_resource_value('wantobjects')
+    if wantobjects is not None:
+        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
index 05bca59e703936..669a3e184eb771 100644
--- a/Lib/test/test_ttk/test_extensions.py
+++ b/Lib/test/test_ttk/test_extensions.py
@@ -3,6 +3,7 @@
 import tkinter
 from tkinter import ttk
 from test.support import requires, gc_collect
+from test.test_tkinter.support import setUpModule  # noqa: F401
 from test.test_tkinter.support import AbstractTkTest, AbstractDefaultRootTest
 
 requires('gui')
diff --git a/Lib/test/test_ttk/test_style.py b/Lib/test/test_ttk/test_style.py
index 19918772514ad4..fdbaae1b644e4d 100644
--- a/Lib/test/test_ttk/test_style.py
+++ b/Lib/test/test_ttk/test_style.py
@@ -5,6 +5,7 @@
 from tkinter import TclError
 from test import support
 from test.support import requires
+from test.test_tkinter.support import setUpModule  # noqa: F401
 from test.test_tkinter.support import AbstractTkTest, get_tk_patchlevel
 
 requires('gui')
diff --git a/Lib/test/test_ttk/test_widgets.py b/Lib/test/test_ttk/test_widgets.py
index f33da2a8848738..e738fbff82ed43 100644
--- a/Lib/test/test_ttk/test_widgets.py
+++ b/Lib/test/test_ttk/test_widgets.py
@@ -5,6 +5,7 @@
 import sys
 
 from test.test_ttk_textonly import MockTclObj
+from test.test_tkinter.support import setUpModule  # noqa: F401
 from test.test_tkinter.support import (
     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
new file mode 100644
index 00000000000000..7d1a153fc7a6ca
--- /dev/null
+++ 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``.