diff --git a/examples/storage/parttool/example_test.py b/examples/storage/parttool/example_test.py
index 1b7229ba06..1765a87a75 100644
--- a/examples/storage/parttool/example_test.py
+++ b/examples/storage/parttool/example_test.py
@@ -28,7 +28,7 @@ def test_examples_parttool(env, extra_data):
             binary_path = flash_file[1]
             break
 
-    subprocess.check_call([sys.executable, script_path, "--binary", binary_path])
+    subprocess.check_call([sys.executable, script_path, "--binary", binary_path, "--port", dut.port])
 
 
 if __name__ == '__main__':