diff --git a/python/paddle/fluid/tests/unittests/test_recurrent_op.py b/python/paddle/fluid/tests/unittests/test_recurrent_op.py
index 6c3555790629409b21c3a5eebbda75fd4541dc4f..e2a65a99837e77f26576a75e7280770dc46db6eb 100644
--- a/python/paddle/fluid/tests/unittests/test_recurrent_op.py
+++ b/python/paddle/fluid/tests/unittests/test_recurrent_op.py
@@ -23,6 +23,8 @@ from paddle.fluid.backward import append_backward
 import numpy as np
 import paddle.fluid.core as core
 
+np.random.seed(123)
+
 
 class PyRNNBase(object):
     def __init__(self, input_shape, output_shape):