diff --git a/package-lock.json b/package-lock.json
index b032eeb..818ef0b 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "ig-types",
-  "version": "2.0.19",
+  "version": "3.0.3",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/test.js b/test.js
index fc481ef..1292be2 100755
--- a/test.js
+++ b/test.js
@@ -103,6 +103,27 @@ var cases = test.Cases({
 	RegExp: function(assert){
 	},
 
+	Promise: function(assert){
+		var p = assert(Promise.cooperative())
+
+		var RESOLVE = 123
+
+		var then
+		p.then(function(v){
+			console.log('then')
+			then = RESOLVE })
+
+		var fin
+		p.finally(function(){
+			console.log('finally')
+			fin = true })
+
+		p.set(123)
+
+		assert(then == RESOLVE, '.then(..)')
+		assert(fin, '.finally(..)')
+	},
+
 	// Date.js
 	Date: function(assert){
 		var d = new Date()