diff --git a/tests/common/devices.py b/tests/common/devices.py
index d930ab6d516..609676d3604 100644
--- a/tests/common/devices.py
+++ b/tests/common/devices.py
@@ -158,6 +158,7 @@ def __init__(self, ansible_adhoc, hostname,
 
         self._facts = self._gather_facts()
         self._os_version = self._get_os_version()
+        self._kernel_version = self._get_kernel_version()
 
         self.reset_critical_services_tracking_list()
 
@@ -192,6 +193,16 @@ def os_version(self):
 
         return self._os_version
 
+    @property
+    def kernel_version(self):
+        """
+        The kernel version running on this SONiC device.
+
+        Returns:
+            str: The SONiC kernel version (e.g. "4.9.0")
+        """
+        return self._kernel_version
+
     @property
     def critical_services(self):
         """
@@ -326,6 +337,14 @@ def _get_os_version(self):
         output = self.command("sonic-cfggen -y /etc/sonic/sonic_version.yml -v build_version")
         return output["stdout_lines"][0].strip()
 
+    def _get_kernel_version(self):
+        """
+        Gets the SONiC kernel version
+        :return:
+        """
+        output = self.command('uname -r')
+        return output["stdout"].split('-')[0]
+
     def get_service_props(self, service, props=["ActiveState", "SubState"]):
         """
         @summary: Use 'systemctl show' command to get detailed properties of a service. By default, only get
diff --git a/tests/platform_tests/cli/test_show_platform.py b/tests/platform_tests/cli/test_show_platform.py
index 385358fe597..9f4383d63fa 100644
--- a/tests/platform_tests/cli/test_show_platform.py
+++ b/tests/platform_tests/cli/test_show_platform.py
@@ -15,6 +15,7 @@
 import pytest
 
 import util
+from pkg_resources import parse_version
 from tests.common.helpers.assertions import pytest_assert
 
 pytestmark = [
@@ -108,12 +109,16 @@ def test_show_platform_psustatus(duthosts, rand_one_dut_hostname):
         # TODO: Compare against expected platform-specific output
 
 
-def verify_show_platform_fan_output(raw_output_lines):
+def verify_show_platform_fan_output(duthost, raw_output_lines):
     """
     @summary: Verify output of `show platform fan`. Expected output is
-              "Fan Not detected" or a table of fan status data conaining 8 columns.
+              "Fan Not detected" or a table of fan status data conaining expect number of columns.
     """
-    NUM_EXPECTED_COLS = 8
+    # workaround to make this test compatible with 201911 and master
+    if parse_version(duthost.kernel_version) > parse_version('4.9.0'):
+        NUM_EXPECTED_COLS = 8
+    else:
+        NUM_EXPECTED_COLS = 6
 
     pytest_assert(len(raw_output_lines) > 0, "There must be at least one line of output")
     if len(raw_output_lines) == 1:
@@ -134,7 +139,7 @@ def test_show_platform_fan(duthosts, rand_one_dut_hostname):
 
     logging.info("Verifying output of '{}' ...".format(cmd))
     fan_status_output_lines = duthost.command(cmd)["stdout_lines"]
-    verify_show_platform_fan_output(fan_status_output_lines)
+    verify_show_platform_fan_output(duthost, fan_status_output_lines)
 
     # TODO: Test values against platform-specific expected data
 
diff --git a/tests/platform_tests/mellanox/mellanox_thermal_control_test_helper.py b/tests/platform_tests/mellanox/mellanox_thermal_control_test_helper.py
index 683e4fb3dbd..2d9544b31d4 100644
--- a/tests/platform_tests/mellanox/mellanox_thermal_control_test_helper.py
+++ b/tests/platform_tests/mellanox/mellanox_thermal_control_test_helper.py
@@ -2,10 +2,12 @@
 import json
 import random
 import logging
+from pkg_resources import parse_version
 from tests.platform_tests.thermal_control_test_helper import *
 from tests.common.mellanox_data import get_platform_data
 from minimum_table import get_min_table
 
+
 NOT_AVAILABLE = 'N/A'
 
 THERMAL_NAMING_RULE = {
@@ -37,8 +39,10 @@
         "temperature": "gearbox{}_temp_input"
     },
     "asic_ambient": {
-        "name": "Ambient ASIC Temp",
-        "temperature": "asic"
+        "name": "ASIC",
+        "temperature": "asic",
+        "high_threshold": "mlxsw/temp_trip_hot",
+        "high_critical_threshold": "mlxsw/temp_trip_crit"
     },
     "port_ambient": {
         "name": "Ambient Port Side Temp",
@@ -54,6 +58,11 @@
     }
 }
 
+ASIC_THERMAL_RULE_201911 = {
+    "name": "Ambient ASIC Temp",
+    "temperature": "asic"
+}
+
 FAN_NAMING_RULE = {
     "fan": {
         "name": "fan{}",
@@ -260,6 +269,16 @@ def deinit(self):
                 logging.error(error_message)
                 raise RuntimeError(error_message)
 
+    def is_201911(self):
+        """
+        Workaround to make thermal control test cases compatible with 201911 and master
+        :return:
+        """
+        if parse_version(self.dut.kernel_version) > parse_version('4.9.0'):
+            return False
+        else:
+            return True
+
 
 class FanDrawerData:
     """
@@ -384,7 +403,7 @@ class FanData:
     PWM_MAX = 255
 
     # Speed tolerance
-    SPEED_TOLERANCE = 0.2
+    SPEED_TOLERANCE = 0.5
 
     # Cooling cur state file
     COOLING_CUR_STATE_FILE = 'cooling_cur_state'
@@ -521,6 +540,10 @@ def __init__(self, mock_helper, naming_rule, index):
         :param index: Thermal index.
         """
         self.helper = mock_helper
+        if 'ASIC' in naming_rule['name']:
+            if self.helper.is_201911():
+                naming_rule = ASIC_THERMAL_RULE_201911
+
         self.name = naming_rule['name']
         self.temperature_file = naming_rule['temperature']
         self.high_threshold_file = naming_rule['high_threshold'] if 'high_threshold' in naming_rule else None
@@ -730,15 +753,18 @@ def mock_data(self):
         platform_data = get_platform_data(self.mock_helper.dut)
         psu_count = platform_data["psus"]["number"]
         naming_rule = FAN_NAMING_RULE['psu_fan']
+        if self.mock_helper.is_201911():
+            led_color = ''
+        else:
+            led_color = 'green'
         for index in range(1, psu_count + 1):
             try:
                 fan_data = FanData(self.mock_helper, naming_rule, index)
-                speed = random.randint(60, 100)
                 fan_data.mock_speed(speed)
 
                 self.expected_data[fan_data.name] = [
                     'N/A',
-                    '',
+                    led_color,
                     fan_data.name,
                     '{}%'.format(fan_data.mocked_speed),
                     NOT_AVAILABLE,
diff --git a/tests/platform_tests/thermal_control_test_helper.py b/tests/platform_tests/thermal_control_test_helper.py
index 61479823dd0..5d948063189 100644
--- a/tests/platform_tests/thermal_control_test_helper.py
+++ b/tests/platform_tests/thermal_control_test_helper.py
@@ -256,8 +256,8 @@ def restart_thermal_control_daemon(dut):
     :return:
     """
     logging.info('Restarting thermal control daemon...')
-    find_thermalctld_pid_cmd = 'docker exec -i pmon bash -c \'pgrep thermalctld | sort\''
-    output = dut.command(find_thermalctld_pid_cmd)
+    find_thermalctld_pid_cmd = 'docker exec -i pmon bash -c \'pgrep -f thermalctld\' | sort'
+    output = dut.shell(find_thermalctld_pid_cmd)
     assert output["rc"] == 0, "Run command '%s' failed" % find_thermalctld_pid_cmd
     assert len(output["stdout_lines"]) == 2, "There should be 2 thermalctld process"
     pid_0 = int(output["stdout_lines"][0].strip())
@@ -273,7 +273,7 @@ def restart_thermal_control_daemon(dut):
     max_wait_time = 30
     while max_wait_time > 0:
         max_wait_time -= 1
-        output = dut.command(find_thermalctld_pid_cmd)
+        output = dut.shell(find_thermalctld_pid_cmd)
         assert output["rc"] == 0, "Run command '%s' failed" % find_thermalctld_pid_cmd
         if len(output["stdout_lines"]) != 2:
             time.sleep(1)