diff --git a/.isort.cfg b/.isort.cfg
index 56f50d1..63f5b73 100644
--- a/.isort.cfg
+++ b/.isort.cfg
@@ -1,7 +1,7 @@
 [settings]
 check=1
 diff=1
-known_third_party=dateutil,pytest,pytz,six
+known_third_party=dateutil,pytest,pytz,six,requests
 known_first_party=stix2
 not_skip=__init__.py
 force_sort_within_sections=1
diff --git a/examples/taxii_example.py b/examples/taxii_example.py
index 688b918..166d028 100644
--- a/examples/taxii_example.py
+++ b/examples/taxii_example.py
@@ -1,4 +1,5 @@
 import json
+
 from stix2.sources.taxii import TAXIIDataSource
 
 # Flask TAXII server - developmental
diff --git a/tox.ini b/tox.ini
index f52a858..69ae434 100644
--- a/tox.ini
+++ b/tox.ini
@@ -30,7 +30,7 @@ max-line-length=160
 
 [testenv:isort-check]
 deps = isort
-commands = isort -rc stix2 -c -df
+commands = isort -rc stix2 examples -c -df
 
 [travis]
 python =