diff --git a/stix2/test/v21/test_malware.py b/stix2/test/v21/test_malware.py
index 98e8d37..a9158cf 100644
--- a/stix2/test/v21/test_malware.py
+++ b/stix2/test/v21/test_malware.py
@@ -1,6 +1,5 @@
 import datetime as dt
 import json
-import re
 
 import pytest
 import pytz