Update keras test to direct import legacy rnn cells.

PiperOrigin-RevId: 371962138
Change-Id: Iaf521eec2bac3510db232ae040e6e657f177c34d
diff --git a/tensorflow/python/keras/layers/recurrent_test.py b/tensorflow/python/keras/layers/recurrent_test.py
index 7bb29d4..acf4ed5 100644
--- a/tensorflow/python/keras/layers/recurrent_test.py
+++ b/tensorflow/python/keras/layers/recurrent_test.py
@@ -34,11 +34,11 @@
 from tensorflow.python.keras.engine import base_layer_utils
 from tensorflow.python.keras.layers import recurrent as rnn_v1
 from tensorflow.python.keras.layers import recurrent_v2 as rnn_v2
+from tensorflow.python.keras.layers.legacy_rnn import rnn_cell_impl
 from tensorflow.python.keras.utils import generic_utils
 from tensorflow.python.ops import array_ops
 from tensorflow.python.ops import init_ops
 from tensorflow.python.ops import math_ops
-from tensorflow.python.ops import rnn_cell
 from tensorflow.python.ops import special_math_ops
 from tensorflow.python.ops import state_ops
 from tensorflow.python.ops import variables as variables_lib
@@ -1291,7 +1291,7 @@
         recurrent_activation='sigmoid',
         implementation=2)
     tf_lstm_cell_output = _run_cell(
-        rnn_cell.LSTMCell,
+        rnn_cell_impl.LSTMCell,
         use_peepholes=True,
         initializer=init_ops.ones_initializer)
     self.assertNotAllClose(first_implementation_output, no_peephole_output)