diff --git a/tests/test_inventory.robot b/tests/test_inventory.robot
index 76b03b7..e3b3878 100644
--- a/tests/test_inventory.robot
+++ b/tests/test_inventory.robot
@@ -48,6 +48,9 @@
     # },
     ${json_data}=  Get Inventory  system/chassis/motherboard/boxelder/bmc
     Should Be True  ${json_data["data"]["Present"]}
+    Should Not Be Equal As Strings
+    ...  ${json_data["data"]["SerialNumber"]}  000000000000
+    ...  msg=BMC planar serial number invalid.
 
 
 Verify Boxelder MAC Address Property Is Populated