message: LabeledTensor: don't test Tensor.shape object, test value instead.
  With the C API enabled, a new TensorShape object may be generated
  every Tensor.get_shape call.
diff: @@ -225,7 +225,7 @@ class LabeledTensorTest(test_util.Base):
  tensor = array_ops.placeholder(dtypes.string, [None])
  actual = core.LabeledTensor(tensor, ['x'])
  self.assertIsNone(actual.axes['x'].size)
  - self.assertIs(actual.axes['x'].value, tensor.get_shape()[0])
  + self.assertIsNone(actual.axes['x'].value.value)
  def test_eq(self):
  self.assertEqual(self.lt, self.lt)
  