$ ./python -m test -v test_tcl
== CPython 3.5.0a0 (default:9ab404cdcaa1+, Sep 4 2014, 10:06:33) [GCC 4.8.1]
==   AIX-1-00F84C0C4C00-powerpc-32bit big-endian
==   hash algorithm: siphash24 32bit
==   /home/dje/src/cpython/build/test_python_48694044
Testing with flags: sys.flags(debug=0, inspect=0, interactive=0, optimize=0, dont_write_bytecode=0, no_user_site=0, no_site=0, ignore_environment=0, verbose=0, bytes_warning=0, quiet=0, hash_randomization=1, isolated=0)
[1/1] test_tcl
patchlevel = 8.4.7
testCall (test.test_tcl.TclTest) ... ok
testCallException (test.test_tcl.TclTest) ... ok
testCallException2 (test.test_tcl.TclTest) ... ok
testEval (test.test_tcl.TclTest) ... ok
testEvalException (test.test_tcl.TclTest) ... ok
testEvalException2 (test.test_tcl.TclTest) ... ok
testEvalFile (test.test_tcl.TclTest) ... ok
testEvalFileException (test.test_tcl.TclTest) ... ok
testGetVar (test.test_tcl.TclTest) ... ok
testGetVarArray (test.test_tcl.TclTest) ... ok
testGetVarArrayException (test.test_tcl.TclTest) ... ok
testGetVarException (test.test_tcl.TclTest) ... ok
testLoadWithUNC (test.test_tcl.TclTest) ... skipped 'Requires Windows'
testPackageRequireException (test.test_tcl.TclTest) ... ok
testSetVar (test.test_tcl.TclTest) ... ok
testSetVarArray (test.test_tcl.TclTest) ... ok
testUnsetVar (test.test_tcl.TclTest) ... ok
testUnsetVarArray (test.test_tcl.TclTest) ... ok
testUnsetVarException (test.test_tcl.TclTest) ... ok
test_eval_null_in_result (test.test_tcl.TclTest) ... ok
test_evalfile_null_in_result (test.test_tcl.TclTest) ... ok
test_exprboolean (test.test_tcl.TclTest) ... ok
test_exprdouble (test.test_tcl.TclTest) ... ok
test_exprlong (test.test_tcl.TclTest) ... ok
test_exprstring (test.test_tcl.TclTest) ... ok
test_getboolean (test.test_tcl.TclTest) ... ok
test_getdouble (test.test_tcl.TclTest) ... ok
test_getint (test.test_tcl.TclTest) ... ok
test_passing_values (test.test_tcl.TclTest) ... ok
test_split (test.test_tcl.TclTest) ... ok
test_splitlist (test.test_tcl.TclTest) ... ok
test_user_command (test.test_tcl.TclTest) ... ERROR
testFlattenLen (test.test_tcl.TkinterTest) ... ok
test_huge_string_builtins (test.test_tcl.BigmemTclTest) ... skipped 'needs UINT_MAX < SIZE_MAX'
test_huge_string_call (test.test_tcl.BigmemTclTest) ... skipped 'needs UINT_MAX < SIZE_MAX'

======================================================================
ERROR: test_user_command (test.test_tcl.TclTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/home/dje/src/cpython/Lib/test/test_tcl.py", line 468, in test_user_command
    check((), '')
  File "/home/dje/src/cpython/Lib/test/test_tcl.py", line 435, in check
    r = self.interp.call('testfunc', value)
MemoryError

----------------------------------------------------------------------
Ran 35 tests in 0.133s

FAILED (errors=1, skipped=3)
test test_tcl failed
1 test failed:
    test_tcl