diff --git a/IPython/html/services/notebooks/filenbmanager.py b/IPython/html/services/notebooks/filenbmanager.py
index 908ad96..9d0a73c 100644
--- a/IPython/html/services/notebooks/filenbmanager.py
+++ b/IPython/html/services/notebooks/filenbmanager.py
@@ -394,7 +394,7 @@ class FileNotebookManager(NotebookManager):
                 u'Notebook checkpoint does not exist: %s-%s' % (name, checkpoint_id)
             )
         # ensure notebook is readable (never restore from an unreadable notebook)
-        with file(cp_path, 'r') as f:
+        with open(cp_path, 'r') as f:
             nb = current.read(f, u'json')
         shutil.copy2(cp_path, nb_path)
         self.log.debug("copying %s -> %s", cp_path, nb_path)
diff --git a/IPython/html/services/notebooks/handlers.py b/IPython/html/services/notebooks/handlers.py
index 540a233..37f6f3a 100644
--- a/IPython/html/services/notebooks/handlers.py
+++ b/IPython/html/services/notebooks/handlers.py
@@ -197,6 +197,7 @@ class NotebookCheckpointsHandler(IPythonHandler):
         location = url_path_join(self.base_project_url, u'/api/notebooks',
             path, name, 'checkpoints', checkpoint[u'checkpoint_id'])
         self.set_header(u'Location', location)
+        self.set_status(201)
         self.finish(data)