diff --git a/Dialogflow-CX/create_agent.py b/Dialogflow-CX/create_agent.py
index 8b116812a8be..daff5ff6aef8 100644
--- a/Dialogflow-CX/create_agent.py
+++ b/Dialogflow-CX/create_agent.py
@@ -35,4 +35,6 @@ def create_agent(project_id, display_name):
     response = agents_client.create_agent(request={"agent": agent, "parent": parent})
 
     return response
+
+
 ## [END dialogflow_cx_create_agent_sample]
diff --git a/Dialogflow-CX/detect_intent_stream.py b/Dialogflow-CX/detect_intent_stream.py
index ebe715150c00..388246466f27 100644
--- a/Dialogflow-CX/detect_intent_stream.py
+++ b/Dialogflow-CX/detect_intent_stream.py
@@ -79,17 +79,23 @@ def request_generator():
 
         # Sets the voice name and gender
         voice_selection.name = "en-GB-Standard-A"
-        voice_selection.ssml_gender = audio_config.SsmlVoiceGender.SSML_VOICE_GENDER_FEMALE
+        voice_selection.ssml_gender = (
+            audio_config.SsmlVoiceGender.SSML_VOICE_GENDER_FEMALE
+        )
 
         synthesize_speech_config.voice = voice_selection
 
         # Sets the audio encoding
-        output_audio_config.audio_encoding = audio_config.OutputAudioEncoding.OUTPUT_AUDIO_ENCODING_UNSPECIFIED
+        output_audio_config.audio_encoding = (
+            audio_config.OutputAudioEncoding.OUTPUT_AUDIO_ENCODING_UNSPECIFIED
+        )
         output_audio_config.synthesize_speech_config = synthesize_speech_config
 
         # The first request contains the configuration.
         yield session.StreamingDetectIntentRequest(
-            session=session_path, query_input=query_input, output_audio_config=output_audio_config
+            session=session_path,
+            query_input=query_input,
+            output_audio_config=output_audio_config,
         )
 
         # Here we are reading small chunks of audio data from a local
diff --git a/Dialogflow-CX/long_running_operation.py b/Dialogflow-CX/long_running_operation.py
index 0eb540c80101..7dea25439e9e 100644
--- a/Dialogflow-CX/long_running_operation.py
+++ b/Dialogflow-CX/long_running_operation.py
@@ -22,18 +22,22 @@
 
 def export_long_running_agent(project_id, agent_id, location):
 
-    api_endpoint = f'{location}-dialogflow.googleapis.com:443'
+    api_endpoint = f"{location}-dialogflow.googleapis.com:443"
     client_options = {"api_endpoint": api_endpoint}
 
     agents_client = AgentsClient(client_options=client_options)
 
     export_request = ExportAgentRequest()
 
-    export_request.name = f'projects/{project_id}/locations/{location}/agents/{agent_id}'
+    export_request.name = (
+        f"projects/{project_id}/locations/{location}/agents/{agent_id}"
+    )
 
     # export_agent returns a long running operation
     operation = agents_client.export_agent(request=export_request)
 
     # Returns the result of the operation when the operation is done
     return operation.result()
+
+
 ## [END dialogflow_cx_long_running_snippet]
diff --git a/Dialogflow-CX/update_intent.py b/Dialogflow-CX/update_intent.py
index 9ba552a48c96..ba7f5588ef9a 100644
--- a/Dialogflow-CX/update_intent.py
+++ b/Dialogflow-CX/update_intent.py
@@ -28,4 +28,6 @@ def update_intent(project_id, agent_id, intent_id, location, displayName):
     update_mask = field_mask_pb2.FieldMask(paths=["display_name"])
     response = intents_client.update_intent(intent=intent, update_mask=update_mask)
     return response
+
+
 # [END dialogflow_cx_update_intent]
diff --git a/Dialogflow-CX/webhook.py b/Dialogflow-CX/webhook.py
index 143f11ee91ef..098718470dbe 100644
--- a/Dialogflow-CX/webhook.py
+++ b/Dialogflow-CX/webhook.py
@@ -11,7 +11,7 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
-''' handle_webhook will return the correct fullfilment response dependong the tag that is sent in the request'''
+""" handle_webhook will return the correct fullfilment response dependong the tag that is sent in the request"""
 
 # [START dialogflow_cx_webhook]
 
@@ -56,4 +56,5 @@ def handle_webhook(request):
     # Returns json
     return res
 
+
 # [END dialogflow_cx_webhook]
diff --git a/Dialogflow-CX/webhook_test.py b/Dialogflow-CX/webhook_test.py
index dee58ddf3d70..fd91a17bc59c 100644
--- a/Dialogflow-CX/webhook_test.py
+++ b/Dialogflow-CX/webhook_test.py
@@ -20,12 +20,10 @@
 
 # Create a fake 'app' for generating test request contexts.
 
-request = {
-    "fulfillmentInfo": {"tag": "Default Welcome Intent"}
-}
+request = {"fulfillmentInfo": {"tag": "Default Welcome Intent"}}
 
 
-@pytest.fixture(scope='module')
+@pytest.fixture(scope="module")
 def app():
     return flask.Flask(__name__)
 
@@ -33,4 +31,4 @@ def app():
 def test_handle_webhook(app):
     with app.test_request_context(json=request):
         res = handle_webhook(flask.request)
-        assert 'Hi from a GCF Webhook' in str(res)
+        assert "Hi from a GCF Webhook" in str(res)