diff --git a/tests/test_transforms.py b/tests/test_transforms.py
index 100da652..7564a778 100644
--- a/tests/test_transforms.py
+++ b/tests/test_transforms.py
@@ -18,7 +18,6 @@ import numpy as np
 import pandas as pd
 
 from datetime import timedelta, datetime
-import unittest
 from unittest import TestCase
 
 from zipline.utils.test_utils import setup_logger