diff --git a/notebook/static/tree/js/notebooklist.js b/notebook/static/tree/js/notebooklist.js
index 4cf108d01..ba5ca31f4 100644
--- a/notebook/static/tree/js/notebooklist.js
+++ b/notebook/static/tree/js/notebooklist.js
@@ -555,6 +555,7 @@ define([
         var uri_prefix = NotebookList.uri_prefixes[model.type];
         if (model.type === 'file' &&
             model.mimetype && model.mimetype.substr(0,5) !== 'text/'
+            && !model.mimetype.endsWith('javascript')
         ) {
             // send text/unidentified files to editor, others go to raw viewer
             uri_prefix = 'files';