diff --git a/redfish/managers/test_certificate.robot b/redfish/managers/test_certificate.robot
index db064ec..7d00362 100644
--- a/redfish/managers/test_certificate.robot
+++ b/redfish/managers/test_certificate.robot
@@ -264,7 +264,7 @@
     [Documentation]  Restore BMC date to its prior value.
 
     Redfish.Patch  ${REDFISH_BASE_URI}Managers/${MANAGER_ID}  body={'DateTime': '${cli_date_time}'}
-    ...  valid_status_codes=[${HTTP_OK}]
+    ...  valid_status_codes=[${HTTP_OK}, ${HTTP_NO_CONTENT}]
 
 
 Generate CSR Via Redfish