diff --git a/test_utils/dut.py b/test_utils/dut.py
index 0eb0a5a..804dadb 100644
--- a/test_utils/dut.py
+++ b/test_utils/dut.py
@@ -14,7 +14,7 @@ class Dut:
             Disk.create_disk(
                 disk_info["path"],
                 DiskType[disk_info["type"]],
-                disk_info["serial"],
+                disk_info.get("serial", None),
                 disk_info["blocksize"],
                 )
             for disk_info in dut_info.get("disks", [])