diff --git a/django/test/testcases.py b/django/test/testcases.py
index 0e33ef082a..e0f2655ee8 100644
--- a/django/test/testcases.py
+++ b/django/test/testcases.py
@@ -917,7 +917,7 @@ class QuietWSGIRequestHandler(WSGIRequestHandler):
         pass
 
 
-if sys.version_info >= (2, 6, 0):
+if sys.version_info >= (2, 7, 0):
     _ImprovedEvent = threading._Event
 else:
     class _ImprovedEvent(threading._Event):