Forgot one file from previous commit.

pytest.py

@@ -22,7 +22,7 @@ from _pytest.main import Session
 from _pytest.nodes import Item, Collector, File
 from _pytest.fixtures import fillfixtures as _fillfuncargs
 from _pytest.python import (
-    Module, Class, Instance, Function, Generator,
+    Package, Module, Class, Instance, Function, Generator,
 )
 
 from _pytest.python_api import approx, raises
@@ -56,6 +56,7 @@ __all__ = [
     'Item',
     'File',
     'Collector',
+    'Package',
     'Session',
     'Module',
     'Class',