diff --git a/Makefile b/Makefile
index c5eec2c..f575416 100755
--- a/Makefile
+++ b/Makefile
@@ -126,6 +126,20 @@
 mib-upload-templating-openonu-go-adapter-test: ROBOT_FILE := Voltha_ONUTemplateTests.robot
 mib-upload-templating-openonu-go-adapter-test: openonu-go-adapter-tests
 
+# target to invoke test with openonu go adapter applying 1T8GEM tech-profile at single ONU with OMCI hardening
+# timeout is determined for omci_response_rate=9 and omci_timeout=1s
+openonu-go-adapter-omci-hardening-passed-test: ROBOT_MISC_ARGS += -v timeout:180s -v techprofile:1T8GEM
+openonu-go-adapter-omci-hardening-passed-test: openonu-go-adapter-test
+
+# target to invoke openonu go adapter failed state test at single ONU with OMCI hardening
+# test should show in case of too small omci_response_rate (<=7) in BBSIM that OMCI hardening does not work
+# test is PASS when ONU does not leave state 'starting-openomci'
+openonu-go-adapter-omci-hardening-failed-test: ROBOT_MISC_ARGS += -v logging:True -v timeout:300s -i NegativeStateTestOnuGo
+openonu-go-adapter-omci-hardening-failed-test: ROBOT_MISC_ARGS += -e notreadyOnuGo -X $(ROBOT_DEBUG_LOG_OPT)
+openonu-go-adapter-omci-hardening-failed-test: ROBOT_CONFIG_FILE := $(ROBOT_SANITY_SINGLE_PON_FILE)
+openonu-go-adapter-omci-hardening-failed-test: ROBOT_FILE := Voltha_ONUNegativeStateTests.robot
+openonu-go-adapter-omci-hardening-failed-test: openonu-go-adapter-tests
+
 # target to invoke reconcile tests with openonu go adapter at single ONU with ATT workflow (default workflow)
 reconcile-openonu-go-adapter-test-att: ROBOT_CONFIG_FILE := $(ROBOT_SANITY_SINGLE_PON_FILE)
 reconcile-openonu-go-adapter-test-att: reconcile-openonu-go-adapter-tests-att
diff --git a/libraries/onu_utilities.robot b/libraries/onu_utilities.robot
index dba9bc9..4c2900a 100755
--- a/libraries/onu_utilities.robot
+++ b/libraries/onu_utilities.robot
@@ -82,7 +82,7 @@
     [Documentation]    This keyword checks the passed state of all onus.
     ...                Hint: ${timeStart} will be not evaluated here!
     [Arguments]    ${state}    ${reqadminstate}=${EMPTY}    ${reqoperstatus}=${EMPTY}    ${reqconnectstatus}=${EMPTY}
-    ...    ${alternativeonustate}=${EMPTY}
+    ...    ${alternativeonustate}=${EMPTY}    ${timeout}=${timeout}
     ${timeStart}=    Get Current Date
     ${list_onus}    Create List
     Build ONU SN List    ${list_onus}
@@ -95,6 +95,8 @@
     ...    Validate ONU Devices With Duration
     ...    ${admin_state}    ${oper_status}    ${connect_status}
     ...    ${onu_state}    ${list_onus}    ${timeStart}    alternate_reason=${alternativeonustate}
+    # teardown is used as 'return' for result of Validate ONU Devices With Duration (used for ONUNegativeStateTests)
+    [Teardown]    Run Keyword If    "${KEYWORD STATUS}"=="FAIL"    Set Suite Variable    ${StateTestAllONUs}    False
 
 Log Ports
     [Documentation]    This keyword logs all port data available in ONOS of first port per ONU
diff --git a/tests/openonu-go-adapter/Voltha_ONUNegativeStateTests.robot b/tests/openonu-go-adapter/Voltha_ONUNegativeStateTests.robot
new file mode 100755
index 0000000..9dc9793
--- /dev/null
+++ b/tests/openonu-go-adapter/Voltha_ONUNegativeStateTests.robot
@@ -0,0 +1,125 @@
+# Copyright 2021 - present Open Networking Foundation
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+*** Settings ***
+Documentation     Negative test states of ONU Go adapter with ATT workflows only (not for DT/TT workflow!)
+Suite Setup       Setup Suite
+Suite Teardown    Teardown Suite
+Test Setup        Setup
+Test Teardown     Teardown
+Library           Collections
+Library           String
+Library           OperatingSystem
+Library           XML
+Library           RequestsLibrary
+Library           ../../libraries/DependencyLibrary.py
+Resource          ../../libraries/onos.robot
+Resource          ../../libraries/voltctl.robot
+Resource          ../../libraries/voltha.robot
+Resource          ../../libraries/utils.robot
+Resource          ../../libraries/k8s.robot
+Resource          ../../libraries/onu_utilities.robot
+Resource          ../../libraries/bbsim.robot
+Resource          ../../variables/variables.robot
+
+*** Variables ***
+${namespace}      voltha
+${timeout}        300s
+${of_id}          0
+${logical_id}     0
+${has_dataplane}    True
+${external_libs}    True
+${teardown_device}    True
+${scripts}        ../../scripts
+# Per-test logging on failure is turned off by default; set this variable to enable
+${container_log_dir}    ${None}
+# KV Store Prefix
+# example: -v kvstoreprefix:voltha_voltha
+${kvstoreprefix}    voltha_voltha
+# used tech profile, can be passed via the command line too, valid values: default (=1T1GEM), 1T4GEM, 1T8GEM
+# example: -v techprofile:1T4GEM
+${techprofile}    default
+# flag debugmode is used, if true timeout calculation various, can be passed via the command line too
+# example: -v debugmode:True
+${debugmode}    False
+# logging flag to enable Collect Logs, can be passed via the command line too
+# example: -v logging:True
+${logging}    False
+# if True execution will be paused before clean up, only use in case of manual testing, do not use in ci pipeline!
+# example: -v pausebeforecleanup:True
+${pausebeforecleanup}    False
+# if True some outputs to console are done during running tests e.g. long duration flow test
+# example: -v print2console:True
+${print2console}    False
+${data_dir}    ../data
+
+
+*** Test Cases ***
+ONU Negative State Test
+    [Documentation]    Validates the ONU Go adapter states will never leave starting-openomci
+    ...                Due to a 'omci-response-rate' lower than 8 more OMCI messages will be through away by BBSIM than
+    ...                repeated by openonu-go-adapter. So ONU will never leave starting-openomci state.
+    ...                Timeout has to set at least to 300s (or more)
+    [Tags]    NegativeStateTestOnuGo
+    [Setup]    Run Keywords    Start Logging    ONUNegativeStateTest
+    ...    AND    Setup
+    # Suite Variable will be overwritten by Teardown of Current State Test All Onus
+    Set Suite Variable    ${StateTestAllONUs}    True
+    ${seconds}=    Convert Time    ${timeout}
+    ${seconds}=    Convert To String    ${seconds}
+    ${seconds}=    Get Substring    ${seconds}    0    -2
+    FOR    ${I}    IN RANGE    ${seconds}
+        Sleep    1s
+        Current State Test All Onus    starting-openomci    timeout=1x
+        Exit For Loop If    not ${StateTestAllONUs}
+    END
+    [Teardown]    Run Keywords    Run Keyword If    ${logging}    Collect Logs
+    ...    AND    Stop Logging    ONUStateTest
+
+
+*** Keywords ***
+Setup Suite
+    [Documentation]    Set up the test suite
+    ${LogInfo}=    Catenate
+    ...    \r\nPassed arguments:
+    ...    techprofile:${techprofile},
+    ...    debugmode:${debugmode}, logging:${logging}, pausebeforecleanup:${pausebeforecleanup},
+    ...    print2console:${print2console}
+    Log    ${LogInfo}    console=yes
+    Common Test Suite Setup
+    ${techprofile}=    Set Variable If    "${techprofile}"=="1T1GEM"    default    ${techprofile}
+    Set Suite Variable    ${techprofile}
+    Run Keyword If    "${techprofile}"=="default"   Log To Console    \nTechProfile:default (1T1GEM)
+    ...    ELSE IF    "${techprofile}"=="1T4GEM"    Set Tech Profile    1T4GEM
+    ...    ELSE IF    "${techprofile}"=="1T8GEM"    Set Tech Profile    1T8GEM
+    ...    ELSE    Fail    The TechProfile (${techprofile}) is not valid!
+    ${onos_ssh_connection}    Open ONOS SSH Connection    ${ONOS_SSH_IP}    ${ONOS_SSH_PORT}
+    Set Suite Variable  ${onos_ssh_connection}
+    # delete etcd MIB Template Data
+    Delete MIB Template Data
+    # delete etcd onu data
+    Delete ONU Go Adapter ETCD Data    validate=True
+
+Teardown Suite
+    [Documentation]    Replaces the Suite Teardown in utils.robot.
+    ...    Cleans up and checks all ONU ports disabled in ONOS.
+    ...    Furthermore gives the possibility to pause the execution.
+    Run Keyword If    ${pausebeforecleanup}    Import Library    Dialogs
+    Run Keyword If    ${pausebeforecleanup}    Pause Execution    Press OK to continue with clean up!
+    Run Keyword If    ${pausebeforecleanup}    Log    Teardown will be continued...    console=yes
+    Run Keyword If    ${teardown_device}    Delete All Devices and Verify
+    Wait Until Keyword Succeeds    ${timeout}    1s    Validate Onu Data In Etcd    0    ${kvstoreprefix}    without_pm_data=False
+    Wait for Ports in ONOS for all OLTs      ${onos_ssh_connection}  0   BBSM    ${timeout}
+    Close All ONOS SSH Connections
+    Remove Tech Profile