diff --git a/test.js b/test.js
index fe7a011..c870c83 100644
--- a/test.js
+++ b/test.js
@@ -1,5 +1,6 @@
 var assert = require('assert')
   , from = require('./')
+  , Stream = require('stream').Stream
 
 var random = ['hello', 'goodbye', 1, 2, 3]
 
@@ -20,6 +21,10 @@ characters.on('data', function(data) {
   assert(i)
 })
 
+from(function() {
+	assert(this instanceof Stream)
+})
+