diff --git a/src/azure-cli-core/tox.ini b/src/azure-cli-core/tox.ini
index d66b18261df..92326adc3a7 100644
--- a/src/azure-cli-core/tox.ini
+++ b/src/azure-cli-core/tox.ini
@@ -1,11 +1,10 @@
 [tox]
-envlist = py37,py36,py27,py38
+envlist = py36,py37,py38
 skip_missing_interpreters = True
 
 [testenv]
 deps = pytest
        mock
        pip
-       azure-mgmt-resource~=6.0.0
        -e ../azure-cli-telemetry
 commands = pytest
diff --git a/src/azure-cli-telemetry/azure/cli/telemetry/components/telemetry_client.py b/src/azure-cli-telemetry/azure/cli/telemetry/components/telemetry_client.py
index 98e5eb18891..36454c71c78 100644
--- a/src/azure-cli-telemetry/azure/cli/telemetry/components/telemetry_client.py
+++ b/src/azure-cli-telemetry/azure/cli/telemetry/components/telemetry_client.py
@@ -5,7 +5,6 @@
 
 import json
 import datetime
-import six
 
 from applicationinsights import TelemetryClient
 from applicationinsights.channel import SynchronousSender, SynchronousQueue, TelemetryChannel
@@ -49,7 +48,7 @@ def add(self, raw, flush=False, force=False):
                 properties = {}
                 measurements = {}
                 for k, v in raw_properties.items():
-                    if isinstance(v, six.string_types):
+                    if isinstance(v, str):
                         properties[k] = v
                     else:
                         measurements[k] = v
diff --git a/src/azure-cli-telemetry/tox.ini b/src/azure-cli-telemetry/tox.ini
index 4d81f8220af..f96bba6bdc0 100644
--- a/src/azure-cli-telemetry/tox.ini
+++ b/src/azure-cli-telemetry/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py37,py36,py27,py38
+envlist = py36,py37,py38
 skip_missing_interpreters = True
 
 [testenv]