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 ff4ce0f32319a19aeb9fc52601ef1be2ff706f44..528e388f6a2e2ac09a5fc67704b6db03f51a90ea 100644
--- a/python/paddle/fluid/tests/unittests/dygraph_to_static/yolov3.py
+++ b/python/paddle/fluid/tests/unittests/dygraph_to_static/yolov3.py
@@ -76,7 +76,7 @@ cfg.label_smooth = True
 # Model options
 #
 # input size
-cfg.input_size = 608
+cfg.input_size = 224 if sys.platform == 'darwin' else 608
 # pixel mean values
 cfg.pixel_means = [0.485, 0.456, 0.406]
 # pixel std values