Logging compat for test_transforms.

tests/test_transforms.py

@@ -2,6 +2,8 @@ from datetime import timedelta
 from collections import defaultdict
 from unittest2 import TestCase
 
+from logbook.compat import LoggingHandler
+
 import zipline.utils.factory as factory
 from zipline.finance.vwap import DailyVWAP, VWAPTransform
 from zipline.finance.returns import ReturnsFromPriorClose
@@ -22,6 +24,11 @@ class ZiplineWithTransformsTestCase(TestCase):
             'allocator':allocator,
             'sid':133
         }
+        self.log_handler = LoggingHandler()
+        self.log_handler.push_application()
+
+    def tearDown(self):
+        self.log_handler.pop_application()
 
     def test_vwap_tnfm(self):
         zipline = SimulatedTrading.create_test_zipline(