diff --git a/tests/test_mx_check.py b/tests/test_mx_check.py
index 63ce22a..91c47c1 100644
--- a/tests/test_mx_check.py
+++ b/tests/test_mx_check.py
@@ -1,4 +1,4 @@
-from smtplib import SMTP, SMTPResponseException
+from smtplib import SMTP
 from types import SimpleNamespace
 from unittest.case import TestCase
 from unittest.mock import Mock, patch