diff --git a/python/orca/test/bigdl/orca/learn/spark/test_estimator_openvino.py b/python/orca/test/bigdl/orca/learn/spark/test_estimator_openvino.py
index ffe1718cbd5..0ca24143906 100644
--- a/python/orca/test/bigdl/orca/learn/spark/test_estimator_openvino.py
+++ b/python/orca/test/bigdl/orca/learn/spark/test_estimator_openvino.py
@@ -16,6 +16,7 @@
 import os
 import tempfile
 import subprocess
+import tarfile
 from unittest import TestCase
 
 import numpy as np
@@ -43,8 +44,9 @@ def test_openvino(self):
             model_url = data_url + "/analytics-zoo-data/openvino2020_resnet50.tar"
             model_path = maybe_download("openvino2020_resnet50.tar",
                                         local_path, model_url)
-            cmd = "tar -xvf " + model_path + " -C " + local_path
-            subprocess.Popen(cmd.split())
+            tar = tarfile.open(model_path)
+            tar.extractall(path=local_path)
+            tar.close()
             model_path = os.path.join(local_path, "openvino2020_resnet50/resnet_v1_50.xml")
             est = Estimator.from_openvino(model_path=model_path)