diff --git a/stix2/test/v20/test_datastore_memory.py b/stix2/test/v20/test_datastore_memory.py
index f9adc4f..2cb0a1c 100644
--- a/stix2/test/v20/test_datastore_memory.py
+++ b/stix2/test/v20/test_datastore_memory.py
@@ -3,10 +3,10 @@ import shutil
 
 import pytest
 
-from stix2 import (Filter, MemorySource, MemoryStore, properties)
+from stix2 import Filter, MemorySource, MemoryStore, properties
+from stix2.datastore import make_id
 from stix2.v20 import (Bundle, Campaign, CustomObject, Identity, Indicator,
                        Malware, Relationship)
-from stix2.datastore import make_id
 
 from .constants import (CAMPAIGN_ID, CAMPAIGN_KWARGS, IDENTITY_ID,
                         IDENTITY_KWARGS, INDICATOR_ID, INDICATOR_KWARGS,
diff --git a/stix2/test/v20/test_granular_markings.py b/stix2/test/v20/test_granular_markings.py
index b36bf65..797e810 100644
--- a/stix2/test/v20/test_granular_markings.py
+++ b/stix2/test/v20/test_granular_markings.py
@@ -2,8 +2,8 @@
 import pytest
 
 from stix2 import markings
-from stix2.v20 import Malware, TLP_RED
 from stix2.exceptions import MarkingNotFoundError
+from stix2.v20 import TLP_RED, Malware
 
 from .constants import MALWARE_MORE_KWARGS as MALWARE_KWARGS_CONST
 from .constants import MARKING_IDS
diff --git a/stix2/test/v21/test_datastore_memory.py b/stix2/test/v21/test_datastore_memory.py
index 5caea9d..56eea14 100644
--- a/stix2/test/v21/test_datastore_memory.py
+++ b/stix2/test/v21/test_datastore_memory.py
@@ -3,10 +3,10 @@ import shutil
 
 import pytest
 
-from stix2 import (Filter, MemorySource, MemoryStore, properties)
+from stix2 import Filter, MemorySource, MemoryStore, properties
+from stix2.datastore import make_id
 from stix2.v21 import (Bundle, Campaign, CustomObject, Identity, Indicator,
                        Malware, Relationship)
-from stix2.datastore import make_id
 
 from .constants import (CAMPAIGN_ID, CAMPAIGN_KWARGS, IDENTITY_ID,
                         IDENTITY_KWARGS, INDICATOR_ID, INDICATOR_KWARGS,
diff --git a/stix2/test/v21/test_granular_markings.py b/stix2/test/v21/test_granular_markings.py
index b606742..eb08fb2 100644
--- a/stix2/test/v21/test_granular_markings.py
+++ b/stix2/test/v21/test_granular_markings.py
@@ -1,8 +1,8 @@
 import pytest
 
 from stix2 import markings
-from stix2.v21 import Malware, TLP_RED
 from stix2.exceptions import MarkingNotFoundError
+from stix2.v21 import TLP_RED, Malware
 
 from .constants import MALWARE_MORE_KWARGS as MALWARE_KWARGS_CONST
 from .constants import MARKING_IDS