The 32bit-only OS X installer links with Tcl/Tk 8.4 as these are the only supported native (Aqua) versions on older supported systems (OS X 10.5 Leopard and earlier).  These failures are also appearing on the Tiger (10.4) buildbots.

$ /usr/local/bin/python3.4 -c 'import tkinter;print(tkinter.TclVersion)'
8.4
$ /usr/local/bin/python3.4 -m test -w -uall test_tcl
[1/1] test_tcl
test test_tcl failed -- multiple errors occurred; run in verbose mode for details
1 test failed:
    test_tcl
Re-running failed tests in verbose mode
Re-running test 'test_tcl' in verbose mode
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_passing_values (test.test_tcl.TclTest) ... ok
test_split (test.test_tcl.TclTest) ... ERROR
test_splitlist (test.test_tcl.TclTest) ... ERROR
testFlattenLen (test.test_tcl.TkinterTest) ... ok
test_huge_string (test.test_tcl.BigmemTclTest) ... skipped 'needs UINT_MAX < SIZE_MAX'

======================================================================
ERROR: test_split (test.test_tcl.TclTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/test/test_tcl.py", line 237, in test_split
    (call('dict', 'create', 12, '\u20ac', b'\xe2\x82\xac', (3.4,)),
_tkinter.TclError: invalid command name "dict"

======================================================================
ERROR: test_splitlist (test.test_tcl.TclTest)
----------------------------------------------------------------------
Traceback (most recent call last):
  File "/Library/Frameworks/Python.framework/Versions/3.4/lib/python3.4/test/test_tcl.py", line 203, in test_splitlist
    (call('dict', 'create', 1, '\u20ac', b'\xe2\x82\xac', (3.4,)),
_tkinter.TclError: invalid command name "dict"

----------------------------------------------------------------------
Ran 24 tests in 7.573s

FAILED (errors=2, skipped=2)
test test_tcl failed