I happended several times. Ran it this morning an got passed it, however other tests failed though:
======================================================================
ERROR: test_anydbm_creation (test.test_dbm.TestCase-dbm.ndbm)
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Traceback (most recent call last):
  File "/home/miki/src/Python-3.3.0a1/Lib/test/test_dbm.py", line 70, in test_anydbm_creation
    self.read_helper(f)
  File "/home/miki/src/Python-3.3.0a1/Lib/test/test_dbm.py", line 111, in read_helper
    self.assertEqual(self._dict[key], f[key.encode("ascii")])
KeyError: b'0'

======================================================================
ERROR: test_anydbm_modification (test.test_dbm.TestCase-dbm.ndbm)
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Traceback (most recent call last):
  File "/home/miki/src/Python-3.3.0a1/Lib/test/test_dbm.py", line 85, in test_anydbm_modification
    self.read_helper(f)
  File "/home/miki/src/Python-3.3.0a1/Lib/test/test_dbm.py", line 111, in read_helper
    self.assertEqual(self._dict[key], f[key.encode("ascii")])
KeyError: b'0'

======================================================================
ERROR: test_anydbm_read (test.test_dbm.TestCase-dbm.ndbm)
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Traceback (most recent call last):
  File "/home/miki/src/Python-3.3.0a1/Lib/test/test_dbm.py", line 91, in test_anydbm_read
    self.read_helper(f)
  File "/home/miki/src/Python-3.3.0a1/Lib/test/test_dbm.py", line 111, in read_helper
    self.assertEqual(self._dict[key], f[key.encode("ascii")])
KeyError: b'0'

----------------------------------------------------------------------
Ran 18 tests in 0.149s

FAILED (errors=3)