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Tkinter tests that fail on linux in tiling window manager #69134
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Serhiy, Florian emailed this to me in response to my pydev post on Linux gui tests. I'll let you decide if you think anything needs to be done.
>>>>>>from Florian
FWIW, those tests seem to fail when using a tiling window manager
(herbstluftwm):======================================================================
FAIL: test_pack_configure_anchor (tkinter.test.test_tkinter.test_geometry_managers.PackTest)
----------------------------------------------------------------------Traceback (most recent call last): File "/usr/lib/python3.4/tkinter/test/test_tkinter/test_geometry_managers.py", line 48, in test_pack_configure_anchor check('n', '30x70+135+20') File "/usr/lib/python3.4/tkinter/test/test_tkinter/test_geometry_managers.py", line 47, in check self.assertEqual(a.winfo_geometry(), geom) AssertionError: '30x70+210+20' != '30x70+135+20' - 30x70+210+20 ? - ^ + 30x70+135+20 ? ^^
======================================================================
FAIL: test_pack_configure_expand (tkinter.test.test_tkinter.test_geometry_managers.PackTest)
----------------------------------------------------------------------Traceback (most recent call last): File "/usr/lib/python3.4/tkinter/test/test_tkinter/test_geometry_managers.py", line 86, in test_pack_configure_expand check('20x40+0+80', '50x30+135+0', '80x80+220+75', '40x30+100+170') File "/usr/lib/python3.4/tkinter/test/test_tkinter/test_geometry_managers.py", line 78, in check self.assertEqual(a.winfo_geometry(), geoms[0]) AssertionError: '20x40+0+102' != '20x40+0+80' - 20x40+0+102 ? ^ - + 20x40+0+80 ? ^
======================================================================
FAIL: test_pack_configure_padx_ipadx_fill (tkinter.test.test_tkinter.test_geometry_managers.PackTest)
----------------------------------------------------------------------Traceback (most recent call last): File "/usr/lib/python3.4/tkinter/test/test_tkinter/test_geometry_managers.py", line 125, in test_pack_configure_padx_ipadx_fill check('20x40+260+80', '240x200+0+0', side='right', padx=20) File "/usr/lib/python3.4/tkinter/test/test_tkinter/test_geometry_managers.py", line 123, in check self.assertEqual(a.winfo_geometry(), geom1) AssertionError: '20x40+412+102' != '20x40+260+80' - 20x40+412+102 + 20x40+260+80======================================================================
FAIL: test_pack_configure_pady_ipady_fill (tkinter.test.test_tkinter.test_geometry_managers.PackTest)
----------------------------------------------------------------------Traceback (most recent call last): File "/usr/lib/python3.4/tkinter/test/test_tkinter/test_geometry_managers.py", line 167, in test_pack_configure_pady_ipady_fill check('20x40+280+80', '280x200+0+0', side='right', pady=20) File "/usr/lib/python3.4/tkinter/test/test_tkinter/test_geometry_managers.py", line 165, in check self.assertEqual(a.winfo_geometry(), geom1) AssertionError: '20x40+432+102' != '20x40+280+80' - 20x40+432+102 + 20x40+280+80======================================================================
FAIL: test_pack_configure_side (tkinter.test.test_tkinter.test_geometry_managers.PackTest)
----------------------------------------------------------------------Traceback (most recent call last): File "/usr/lib/python3.4/tkinter/test/test_tkinter/test_geometry_managers.py", line 208, in test_pack_configure_side check('top', '20x40+140+0', '300x160+0+40') File "/usr/lib/python3.4/tkinter/test/test_tkinter/test_geometry_managers.py", line 206, in check self.assertEqual(a.winfo_geometry(), geom1) AssertionError: '20x40+216+0' != '20x40+140+0' - 20x40+216+0 ? - ^ + 20x40+140+0 ? ^^
They however run fine in floating mode, so I'm guessing this is just a
limitation of those tests.I already added a workaround to pass these tests on my netbook (new windows are opened maximized on it). May be there is a way to make a window floating in tiled window manager in Tk.
The-Compiler commented
on Sep 1, 2015 The-CompilermannequinMannequinAt least with my WM, there is no concept of having floating windows when in tiling mode, so I don't think that would be possible.
I also don't think there's a standard way to tell a window manager to not tile windows.
What about opening a simple window with a fixed geometry, checking if this was changed by the WM, and if it is, skip those tests?
- added 11 commits that reference this issue
on Jun 28, 2026 The GUI tests that assumed a window is mapped immediately with a usable geometry now go through
require_mapped()/wait_until_mapped()(intest.test_tkinter.support), which waits for the window manager to map the window and skips cleanly when it won't — so they no longer fail under tiling WMs like herbstluftwm. Done across #152499, #152599 and #152690. Closing as fixed — thanks for the report!- added 3 commits that reference this issue
on Jul 5, 2026 NotebookTest.test_traversalwasn't covered by GH-152499 and still fails intermittently on a real X11 display:identify(5, 5)is called before the notebook reaches its requested size, so the pixel lands outside the first tab and returns''. Reopening to harden it.
Note: these values reflect the state of the issue at the time it was migrated and might not reflect the current state.
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