diff --git a/index.js b/index.js
index ce2c8b9..fc5cde9 100644
--- a/index.js
+++ b/index.js
@@ -88,13 +88,20 @@ module.exports = function kindOf(val) {
   if (type === '[object Symbol]') {
     return 'symbol';
   }
+  
   if (type === '[object Map Iterator]') {
     return 'mapiterator';
   }
   if (type === '[object Set Iterator]') {
     return 'setiterator';
   }
-
+  if (type === '[object String Iterator]') {
+    return 'stringiterator';
+  }
+  if (type === '[object Array Iterator]') {
+    return 'arrayiterator';
+  }
+  
   // typed arrays
   if (type === '[object Int8Array]') {
     return 'int8array';
diff --git a/test/es6/index.js b/test/es6/index.js
index 8b927b6..e6f4eab 100644
--- a/test/es6/index.js
+++ b/test/es6/index.js
@@ -62,15 +62,22 @@ module.exports = function() {
     });
 
     it('should work for Set Iterator', function() {
-      var set = new Set().values();
-      assert.equal(kindOf(set), 'setiterator');
+      var SetValuesIterator = new Set().values();
+      assert.equal(kindOf(SetValuesIterator), 'setiterator');
     });
-
     it('should work for Map Iterator', function() {
-      var map = new Map().values();
-      assert.equal(kindOf(map), 'mapiterator');
-    });
-
+      var MapValuesIterator = new Map().values();
+      assert.equal(kindOf(MapValuesIterator), 'mapiterator');
+    });
+    it('should work for Array Iterator', function() {
+      var ArrayEntriesIterator = [].entries();
+      assert.equal(kindOf(ArrayEntriesIterator), 'arrayiterator');
+    })
+    it('should work for String Iterator', function() {
+      var StringCharIterator = ''[Symbol.iterator]();
+      assert.equal(kindOf(StringCharIterator), 'stringiterator');
+    })
+    
     it('should work for Symbol', function() {
       assert.equal(kindOf(Symbol('foo')), 'symbol');
       assert.equal(kindOf(Symbol.prototype), 'symbol');