diff --git a/redfish/managers/test_managers_bmc_time.robot b/redfish/managers/test_managers_bmc_time.robot
index 6c78139..6476c04 100644
--- a/redfish/managers/test_managers_bmc_time.robot
+++ b/redfish/managers/test_managers_bmc_time.robot
@@ -216,10 +216,10 @@
 
 
 Set Time To Manual Mode
-    [Documentation]  Set date time to manual mode via REST.
+    [Documentation]  Set date time to manual mode via Redfish.
 
-    ${data}=  Create Dictionary  data=${MANUAL_MODE}
-    Write Attribute  ${TIME_MANAGER_URI}sync_method  TimeSyncMethod  data=${data}  verify=${TRUE}
+    Redfish.Patch  ${REDFISH_NW_PROTOCOL_URI}  body={'NTP':{'ProtocolEnabled': ${False}}}
+    ...  valid_status_codes=[${HTTP_OK}, ${HTTP_NO_CONTENT}]
 
 
 Restore NTP Mode
@@ -240,7 +240,6 @@
     Redfish.Login
     Get NTP Initial Status
     Set Time To Manual Mode
-    Set NTP state  ${FALSE}
 
 
 Suite Teardown Execution