test failures with 2.7.0

I'm seeing some test failures here with 2.7.0:

cliff.tests.test_utils.TestTerminalWidth.test_windows ... ok
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ERROR: cliff.tests.test_commandmanager.TestFindInvalidCommand.test
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_StringException: Empty attachments:
  stderr
  stdout
Traceback (most recent call last):
  File "/builddir/build/BUILD/cliff-2.7.0/cliff/tests/test_commandmanager.py", line 65, in test
    mgr.find_command(self.argv)
AttributeError: 'TestFindInvalidCommand' object has no attribute 'argv'
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ERROR: cliff.tests.test_commandmanager.TestLookupAndFind.test
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_StringException: Empty attachments:
  stderr
  stdout
Traceback (most recent call last):
  File "/builddir/build/BUILD/cliff-2.7.0/cliff/tests/test_commandmanager.py", line 34, in test
    cmd, name, remaining = mgr.find_command(self.argv)
AttributeError: 'TestLookupAndFind' object has no attribute 'argv'
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ERROR: cliff.tests.test_commandmanager.TestLookupWithRemainder.test
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_StringException: Empty attachments:
  stderr
  stdout
Traceback (most recent call last):
  File "/builddir/build/BUILD/cliff-2.7.0/cliff/tests/test_commandmanager.py", line 50, in test
    cmd, name, remaining = mgr.find_command(self.argv)
AttributeError: 'TestLookupWithRemainder' object has no attribute 'argv'
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ERROR: Adapter test runner load hooks to call generate_scenarios.
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Traceback (most recent call last):
  File "/usr/lib/python2.7/site-packages/nose/case.py", line 197, in runTest
    self.test(*self.arg)
  File "/usr/lib/python2.7/site-packages/nose/util.py", line 620, in newfunc
    return func(*arg, **kw)
  File "/usr/lib/python2.7/site-packages/testscenarios/scenarios.py", line 106, in load_tests_apply_scenarios
    if getattr(params[0], 'suiteClass', None) is not None:
IndexError: tuple index out of range
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Ran 137 tests in 0.406s
FAILED (SKIP=1, errors=4)

Happy to gather more info, etc. Thanks.