diff --git a/tests/saitests/py3/sai_qos_tests.py b/tests/saitests/py3/sai_qos_tests.py
index 0e997460617..8719d6b2f9b 100755
--- a/tests/saitests/py3/sai_qos_tests.py
+++ b/tests/saitests/py3/sai_qos_tests.py
@@ -3158,6 +3158,9 @@ def runTest(self):
             sys.stderr.flush()
 
             upper_bound = 2 * margin + 1
+            if (hwsku == 'Arista-7260CX3-D108C8' and self.testbed_type in ('t0-116', 'dualtor-120')) \
+                    or (hwsku == 'Arista-7260CX3-C64' and self.testbed_type in ('dualtor-aa-56', 't1-64-lag')):
+                upper_bound = 2 * margin + self.pgs_num
             if self.wm_multiplier:
                 hdrm_pool_wm = sai_thrift_read_headroom_pool_watermark(
                     self.src_client, self.buf_pool_roid)