message: tf.all_variables is nw tf.compat.v1.all_variables
diff: @@ -67,7 +67,7 @@ def make_prelu_tests(options):
  alpha_values = create_tensor_data(np.float32, alpha_shape)
  # There should be only 1 trainable variable tensor.
  - variables = tf.all_variables()
  + variables = tf.compat.v1.all_variables()
  assert len(variables) == 1
  sess.run(variables[0].assign(alpha_values))
  