diff --git a/tests/platform_tests/mellanox/test_check_sfp_using_ethtool.py b/tests/platform_tests/mellanox/test_check_sfp_using_ethtool.py
index 33a4e9e3c78..86d285fea94 100644
--- a/tests/platform_tests/mellanox/test_check_sfp_using_ethtool.py
+++ b/tests/platform_tests/mellanox/test_check_sfp_using_ethtool.py
@@ -9,6 +9,7 @@
 import json
 import pytest
 from tests.common.fixtures.conn_graph_facts import conn_graph_facts
+from tests.common.mellanox_data import SPC3_HWSKUS
 from check_hw_mgmt_service import check_hw_management_service
 
 pytestmark = [
@@ -21,17 +22,26 @@ def test_check_sfp_using_ethtool(duthost, conn_graph_facts):
     ports_config = json.loads(duthost.command("sudo sonic-cfggen -d --var-json PORT")["stdout"])
 
     logging.info("Use the ethtool to check SFP information")
+    if duthost.facts["hwsku"] in SPC3_HWSKUS:
+        lanes_divider = 8
+    else:
+        lanes_divider = 4
     for intf in conn_graph_facts["device_conn"]:
         intf_lanes = ports_config[intf]["lanes"]
-        sfp_id = int(intf_lanes.split(",")[0])/4 + 1
+        sfp_id = int(intf_lanes.split(",")[0])/lanes_divider + 1
 
         ethtool_sfp_output = duthost.command("sudo ethtool -m sfp%s" % str(sfp_id))
         assert ethtool_sfp_output["rc"] == 0, "Failed to read eeprom of sfp%s using ethtool" % str(sfp_id)
-        assert len(ethtool_sfp_output["stdout_lines"]) >= 5, \
-            "Does the ethtool output look normal? " + str(ethtool_sfp_output["stdout_lines"])
-        for line in ethtool_sfp_output["stdout_lines"]:
-            assert len(line.split(":")) >= 2, \
-                "Unexpected line %s in %s" % (line, str(ethtool_sfp_output["stdout_lines"]))
+        # QSFP-DD cable case (currenly ethtool not supporting a full parser)
+        if len(ethtool_sfp_output["stdout_lines"]) == 1:
+            assert '0x18' in str(ethtool_sfp_output["stdout_lines"]), \
+                "Does the ethtool output look normal? " + str(ethtool_sfp_output["stdout_lines"])
+        else:
+            assert len(ethtool_sfp_output["stdout_lines"]) >= 5, \
+                "Does the ethtool output look normal? " + str(ethtool_sfp_output["stdout_lines"])
+            for line in ethtool_sfp_output["stdout_lines"]:
+                assert len(line.split(":")) >= 2, \
+                    "Unexpected line %s in %s" % (line, str(ethtool_sfp_output["stdout_lines"]))
 
     logging.info("Check interface status")
     mg_facts = duthost.minigraph_facts(host=duthost.hostname)["ansible_facts"]