diff --git a/tests/sub_port_interfaces/test_sub_port_l2_forwarding.py b/tests/sub_port_interfaces/test_sub_port_l2_forwarding.py
index a2fd82d4f3..d27d3a2d5e 100644
--- a/tests/sub_port_interfaces/test_sub_port_l2_forwarding.py
+++ b/tests/sub_port_interfaces/test_sub_port_l2_forwarding.py
@@ -110,9 +110,9 @@ def check_no_cpu_packets(duthost, port, packet_fingerprint):
     def verify_no_packet_received(ptfadapter, ports, packet_fingerprint):
         for port in ports:
             for packet, _ in ptfadapter.dataplane.packet_queues[(0, port)]:
-                if packet_fingerprint in packet:
+                if packet_fingerprint in str(packet):
                     logging.error("Received packet with fingerprint '%s' on port %s: %s\n", port, packet_fingerprint,
-                                  packet)
+                                  str(packet))
                     pytest.fail("Received packet on port %s" % port)
 
     duthost = duthosts[rand_one_dut_hostname]