diff --git a/python/paddle/fluid/tests/unittests/dygraph_to_static/yolov3.py b/python/paddle/fluid/tests/unittests/dygraph_to_static/yolov3.py
index b883f1820c1b19a5ee8513c98dbf3a9196369d3c..d8f088019ba464c7c7f5075c734371848c24536b 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/yolov3.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/yolov3.py
@@ -15,6 +15,9 @@
 from __future__ import division
 from __future__ import print_function
 
+import os
+import sys
+
 import paddle.fluid as fluid
 from paddle.fluid.dygraph import declarative
 from paddle.fluid.dygraph.base import to_variable
@@ -90,7 +93,7 @@ cfg.ignore_thresh = .7
 # SOLVER options
 #
 # batch size
-cfg.batch_size = 4
+cfg.batch_size = 2 if sys.platform == 'darwin' or os.name == 'nt' else 4 
 # derived learning rate the to get the final learning rate.
 cfg.learning_rate = 0.001
 # maximum number of iterations