diff --git a/js/dos/test/compat.fs b/js/dos/test/compat.fs
new file mode 100644
index 0000000..d2850b5
--- /dev/null
+++ b/js/dos/test/compat.fs
@@ -0,0 +1,11 @@
+var Io = require('../io');
+var Net = require('../network');
+var Sch = require('../scheduler');
+var Conn = require('../connection');
+var Rpc = require('../rpc');
+var Std = require('../std');
+var Afs = require('../afs');
+var Router = require('../router');
+var util = require('util');
+var Array = require('../compat').array;
+