Fix logging when running tests with twisted installed.

diff --git a/tornado/test/twisted_test.py b/tornado/test/twisted_test.py
index 1cff30ecbb6c82a7aa6c8044f80092fb0496d9f0..ed234c460a70fe77c1418609e6fc1ef119ae85e3 100644 (file)
--- a/tornado/test/twisted_test.py
+++ b/tornado/test/twisted_test.py
@@ -686,7 +686,7 @@ if have_twisted:
     except ImportError:
         pass
     else:
-        globalLogBeginner.beginLoggingTo([])
+        globalLogBeginner.beginLoggingTo([], redirectStandardIO=False)
 
 if have_twisted:
     class LayeredTwistedIOLoop(TwistedIOLoop):