message: Remove Keras dependency from tfe test.
diff: @@ -39,7 +39,6 @@ from tensorflow.python.ops import array_ops
  from tensorflow.python.ops import math_ops
  from tensorflow.python.ops import random_ops
  from tensorflow.python.ops import resource_variable_ops
  -from tensorflow.python import keras
  class Tests(test.TestCase):
  @@ -261,10 +260,12 @@ class Tests(test.TestCase):
  def testEagerExecute_InvalidType(self):
  # Test case for GitHub issue 26879.
  - value = keras.layers.Input((128, 128, 1), dtype="float32")
  + with ops.Graph().as_default():
  + a_2_by_2 = constant_op.constant(1.0, shape=[2, 2])
  + m = resource_variable_ops.ResourceVariable(a_2_by_2)
  with self.assertRaisesRegexp(TypeError,
  "Expected list for 'values' argument"):
  - _ = array_ops.stack(value, axis=1)
  + _ = array_ops.stack(m, axis=1)
  def testGraphResourceVariableRaisesFallback(self):
  with ops.Graph().as_default():
  