diff --git a/stix2/test/v20/test_datastore_memory.py b/stix2/test/v20/test_datastore_memory.py
index c86f94d..7852746 100644
--- a/stix2/test/v20/test_datastore_memory.py
+++ b/stix2/test/v20/test_datastore_memory.py
@@ -432,8 +432,8 @@ def test_unversioned_objects(mem_store):
         "created": "1988-01-02T16:44:04.000Z",
         "definition_type": "statement",
         "definition": {
-            "statement": "Copyright (C) ACME Corp."
-        }
+            "statement": "Copyright (C) ACME Corp.",
+        },
     }
 
     mem_store.add(marking)
diff --git a/stix2/test/v21/test_datastore_memory.py b/stix2/test/v21/test_datastore_memory.py
index ad61431..e07943c 100644
--- a/stix2/test/v21/test_datastore_memory.py
+++ b/stix2/test/v21/test_datastore_memory.py
@@ -448,14 +448,14 @@ def test_unversioned_objects(mem_store):
         "created": "1988-01-02T16:44:04.000Z",
         "definition_type": "statement",
         "definition": {
-            "statement": "Copyright (C) ACME Corp."
-        }
+            "statement": "Copyright (C) ACME Corp.",
+        },
     }
 
     file_sco = {
         "type": "file",
         "id": "file--bbd59c0c-1aa4-44f1-96de-80b8325372c7",
-        "name": "cats.png"
+        "name": "cats.png",
     }
 
     mem_store.add([marking, file_sco])