diff --git a/tests/qos/qos_sai_base.py b/tests/qos/qos_sai_base.py
index 6e64f21e80d..0c27afd5247 100644
--- a/tests/qos/qos_sai_base.py
+++ b/tests/qos/qos_sai_base.py
@@ -33,7 +33,7 @@ class QosBase:
     Common APIs
     """
     SUPPORTED_T0_TOPOS = ["t0", "t0-56-po2vlan", "t0-64", "t0-116", "t0-35", "dualtor-56", "dualtor-120", "dualtor",
-                          "t0-80", "t0-backend"]
+                          "t0-120", "t0-80", "t0-backend"]
     SUPPORTED_T1_TOPOS = ["t1-lag", "t1-64-lag", "t1-56-lag", "t1-backend"]
     SUPPORTED_PTF_TOPOS = ['ptf32', 'ptf64']
     SUPPORTED_ASIC_LIST = ["gr", "gb", "td2", "th", "th2", "spc1", "spc2", "spc3", "td3", "th3", "j2c+", "jr2"]
diff --git a/tests/saitests/py3/sai_qos_tests.py b/tests/saitests/py3/sai_qos_tests.py
index 183e736444d..f8e0834d260 100644
--- a/tests/saitests/py3/sai_qos_tests.py
+++ b/tests/saitests/py3/sai_qos_tests.py
@@ -2354,7 +2354,7 @@ def setUp(self):
         self.src_port_macs = [self.dataplane.get_mac(
             0, ptid) for ptid in self.src_port_ids]
 
-        if self.testbed_type in ['dualtor', 'dualtor-56', 't0', 't0-64', 't0-116']:
+        if self.testbed_type in ['dualtor', 'dualtor-56', 't0', 't0-64', 't0-116', 't0-120']:
             # populate ARP
             # sender's MAC address is corresponding PTF port's MAC address
             # sender's IP address is caculated in tests/qos/qos_sai_base.py::QosSaiBase::__assignTestPortIps()