diff --git a/libraries/botbuilder-ai/tests/qna/test_qna.py b/libraries/botbuilder-ai/tests/qna/test_qna.py
index 03e176d6e..e733b6564 100644
--- a/libraries/botbuilder-ai/tests/qna/test_qna.py
+++ b/libraries/botbuilder-ai/tests/qna/test_qna.py
@@ -4,12 +4,13 @@
 # pylint: disable=protected-access
 # pylint: disable=too-many-lines
 
-import json
-import requests
+import unittest
 from os import path
 from typing import List, Dict
-import unittest
 from unittest.mock import patch
+
+import json
+import requests
 from aiohttp import ClientSession
 
 import aiounittest
@@ -171,9 +172,7 @@ async def test_returns_answer_using_requests_module(self):
         response_path: str = "ReturnsAnswer.json"
         response_json = QnaApplicationTest._get_json_for_file(response_path)
 
-        qna = QnAMaker(
-            endpoint=QnaApplicationTest.tests_endpoint, http_client=requests
-        )
+        qna = QnAMaker(endpoint=QnaApplicationTest.tests_endpoint, http_client=requests)
         context = QnaApplicationTest._get_context(question, TestAdapter())
 
         with patch("requests.post", return_value=response_json):
@@ -185,7 +184,7 @@ async def test_returns_answer_using_requests_module(self):
             self.assertEqual(
                 "BaseCamp: You can use a damp rag to clean around the Power Pack",
                 answers[0].answer,
-        )
+            )
 
     async def test_returns_answer_using_options(self):
         # Arrange
@@ -287,7 +286,7 @@ async def test_returns_answer_using_requests_module_with_no_timeout(self):
             context=None,
             qna_id=None,
             is_test=False,
-            ranker_type="Default"
+            ranker_type="Default",
         )
         response_path = "ReturnsAnswer.json"
         response_json = QnaApplicationTest._get_json_for_file(response_path)
@@ -296,10 +295,7 @@ async def test_returns_answer_using_requests_module_with_no_timeout(self):
 
         with patch("requests.post", return_value=response_json):
             result = await http_request_helper.execute_http_request(
-                url,
-                question,
-                QnaApplicationTest.tests_endpoint,
-                timeout=None
+                url, question, QnaApplicationTest.tests_endpoint, timeout=None
             )
             answers = result["answers"]
 
@@ -308,7 +304,7 @@ async def test_returns_answer_using_requests_module_with_no_timeout(self):
             self.assertEqual(
                 "BaseCamp: You can use a damp rag to clean around the Power Pack",
                 answers[0]["answer"],
-        )
+            )
 
     async def test_telemetry_returns_answer(self):
         # Arrange
diff --git a/libraries/botframework-connector/botframework/connector/auth/jwt_token_validation.py b/libraries/botframework-connector/botframework/connector/auth/jwt_token_validation.py
index aecf27ce6..737ba39ad 100644
--- a/libraries/botframework-connector/botframework/connector/auth/jwt_token_validation.py
+++ b/libraries/botframework-connector/botframework/connector/auth/jwt_token_validation.py
@@ -167,7 +167,9 @@ async def validate_claims(
             await auth_config.claims_validator(claims)
         elif SkillValidation.is_skill_claim(claims):
             # Skill claims must be validated using AuthenticationConfiguration claims_validator
-            raise PermissionError("Unauthorized Access. Request is not authorized. Skill Claims require validation.")
+            raise PermissionError(
+                "Unauthorized Access. Request is not authorized. Skill Claims require validation."
+            )
 
     @staticmethod
     def is_government(channel_service: str) -> bool:
diff --git a/pipelines/botbuilder-python-ci.yml b/pipelines/botbuilder-python-ci.yml
index c5d11005f..a55083ff1 100644
--- a/pipelines/botbuilder-python-ci.yml
+++ b/pipelines/botbuilder-python-ci.yml
@@ -59,7 +59,7 @@ jobs:
       pip install -r ./libraries/botbuilder-ai/tests/requirements.txt
       pip install coveralls
       pip install pylint==2.4.4
-      pip install black
+      pip install black==19.10b0
     displayName: 'Install dependencies'
 
   - script: |