diff --git a/_pytest/__init__.py b/_pytest/__init__.py
index 7ca204091..dd36f3759 100644
--- a/_pytest/__init__.py
+++ b/_pytest/__init__.py
@@ -1,2 +1,2 @@
 #
-__version__ = '2.9.0'
+__version__ = '2.9.1.dev1'