This is blocked on the IDLE issue in https://github.com/python/cpython/runs/5334087871?check_suite_focus=true

======================================================================
ERROR: test_mousewheel (idlelib.idle_test.test_sidebar.ShellSidebarTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "D:\a\cpython\cpython\Lib\idlelib\idle_test\tkinter_testing_utils.py", line 58, in new_test_method
    raise exception
    ^^^^^^^^^^^^^^^
  File "D:\a\cpython\cpython\Lib\idlelib\idle_test\tkinter_testing_utils.py", line 42, in after_callback
    next(test_generator)
    ^^^^^^^^^^^^^^^^^^^^
  File "D:\a\cpython\cpython\Lib\idlelib\idle_test\test_sidebar.py", line 694, in test_mousewheel
    sidebar.canvas.event_generate('<MouseWheel>', x=0, y=0, delta=delta)
    ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "D:\a\cpython\cpython\Lib\tkinter\__init__.py", line 1886, in event_generate
    self.tk.call(args)
    ^^^^^^^^^^^^^^^^^^
_tkinter.TclError: <MouseWheel> event doesn't accept "-delta" option

I don't have time to look into it right now, but it seems to be reliable on 64-bit builds but works on 32-bit.