diff --git a/limbo/testcases/bettertls.py b/limbo/testcases/bettertls.py
index 9386f387..892b2741 100644
--- a/limbo/testcases/bettertls.py
+++ b/limbo/testcases/bettertls.py
@@ -11,7 +11,7 @@
 import ipaddress
 import json
 import logging
-from datetime import timedelta, timezone
+from datetime import timedelta
 
 from cryptography import x509