diff --git a/tests/history_cases.py b/tests/history_cases.py
index 5f8f3dd2..0496ed5d 100644
--- a/tests/history_cases.py
+++ b/tests/history_cases.py
@@ -8,10 +8,7 @@ import numpy as np
 from zipline.finance.trading import TradingEnvironment
 from zipline.history.history import HistorySpec
 from zipline.protocol import BarData
-
-
-def to_utc(time_str):
-    return pd.Timestamp(time_str, tz='US/Eastern').tz_convert('UTC')
+from zipline.utils.test_utils import to_utc
 
 
 def mixed_frequency_expected_index(count, frequency):
diff --git a/zipline/utils/test_utils.py b/zipline/utils/test_utils.py
index e027b802..451590f7 100644
--- a/zipline/utils/test_utils.py
+++ b/zipline/utils/test_utils.py
@@ -4,6 +4,12 @@ from zipline.finance.blotter import ORDER_STATUS
 
 from six import itervalues
 
+import pandas as pd
+
+
+def to_utc(time_str):
+    return pd.Timestamp(time_str, tz='US/Eastern').tz_convert('UTC')
+
 
 def setup_logger(test, path='test.log'):
     test.log_handler = FileHandler(path)