$ ./python -m test.regrtest -ugui -v test_idle test_gc
...
======================================================================
FAIL: test_saveall (test.test_gc.GCTests)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/serhiy/py/cpython-2.7/Lib/test/test_gc.py", line 200, in test_saveall
    self.assertEqual(gc.garbage, [])
AssertionError: Lists differ: [<Tkinter.StringVar instance a... != []

First list contains 24 additional elements.
First extra element 0:
PY_VAR0

Diff is 1123 characters long. Set self.maxDiff to None to see it.

----------------------------------------------------------------------