diff --git a/_pytest/python.py b/_pytest/python.py
index 61a3f63c9..0feb9785c 100644
--- a/_pytest/python.py
+++ b/_pytest/python.py
@@ -34,7 +34,7 @@ def pytest_namespace():
         'collect': {
         'Module': Module, 'Class': Class, 'Instance': Instance,
         'Function': Function, 'Generator': Generator,
-        '_fillfuncargs': fillfuncargs}
+        }
     }
 
 def pytest_funcarg__pytestconfig(request):