diff --git a/nova/tests/__init__.py b/nova/tests/__init__.py
index dff2ad649..9ff38e3a9 100644
--- a/nova/tests/__init__.py
+++ b/nova/tests/__init__.py
@@ -44,7 +44,7 @@ from nova import log as logging
 import eventlet
 
 
-eventlet.monkey_patch()
+eventlet.monkey_patch(os=False)
 
 FLAGS = flags.FLAGS
 FLAGS.use_stderr = False