diff --git a/tests/functional/Voltha_FailureScenarios.robot b/tests/functional/Voltha_FailureScenarios.robot
index 7b85af3..2378ae2 100644
--- a/tests/functional/Voltha_FailureScenarios.robot
+++ b/tests/functional/Voltha_FailureScenarios.robot
@@ -517,6 +517,10 @@
     ...    http://karaf:karaf@${ONOS_REST_IP}:${ONOS_REST_PORT}    ${of_id}
 
     FOR    ${I}    IN RANGE    0    ${num_onus}
+        ${src}=    Set Variable    ${hosts.src[${I}]}
+        ${dst}=    Set Variable    ${hosts.dst[${I}]}
+        ${onu_port}=    Wait Until Keyword Succeeds    ${timeout}    2s    Get ONU Port in ONOS    ${src['onu']}
+        ...    ${of_id}
         # Add subscriber access and verify that DHCP completes to ensure system is still functioning properly
         Wait Until Keyword Succeeds    ${timeout}    2s    Execute ONOS CLI Command    ${ONOS_SSH_IP}
         ...    ${ONOS_SSH_PORT}    volt-add-subscriber-access ${of_id} ${onu_port}