diff --git a/contrib/opencensus-ext-datadog/tests/traces_test.py b/contrib/opencensus-ext-datadog/tests/traces_test.py
index 87518decd..4183c144d 100644
--- a/contrib/opencensus-ext-datadog/tests/traces_test.py
+++ b/contrib/opencensus-ext-datadog/tests/traces_test.py
@@ -91,7 +91,7 @@
 #         }]
 
 #         for tc in test_cases:
-#             self.assertEqual(value_from_atts_elem(tc['elem']), tc['expected'])
+#             self.assertEqual(value_from_atts_elem(tc['elem']), tc['expected'])  # noqa: E501
 
 #     def test_export(self):
 #         mock_dd_transport = mock.Mock()
@@ -326,7 +326,7 @@
 #         ]
 
 #         for tc in test_cases:
-#             out = atts_to_metadata(tc.get('input'), meta=tc.get('input_meta'))
+#             out = atts_to_metadata(tc.get('input'), meta=tc.get('input_meta'))  # noqa: E501
 #             self.assertEqual(out, tc.get('output'))
 
 #     def test_new_trace_exporter(self):
diff --git a/tox.ini b/tox.ini
index c7a7bd2c6..c0dd9cc35 100644
--- a/tox.ini
+++ b/tox.ini
@@ -18,7 +18,7 @@ deps =
   unit,lint,docs: -e contrib/opencensus-correlation
   unit,lint,docs: -e .
   unit,lint: -e contrib/opencensus-ext-azure
-  # unit,lint: -e contrib/opencensus-ext-datadog
+  ; unit,lint: -e contrib/opencensus-ext-datadog
   unit,lint: -e contrib/opencensus-ext-dbapi
   unit,lint: -e contrib/opencensus-ext-django
   unit,lint: -e contrib/opencensus-ext-flask