2 files changed, 11 insertions, 3 deletions
diff --git a/lib/async.js b/lib/async.js
index baf5820..b5ba2ea 100644
--- a/lib/async.js
+++ b/lib/async.js
@@ -406,6 +406,7 @@
         });
 
         _forEach(keys, function (k) {
+            var fired = false;
             var task = (tasks[k] instanceof Function) ? [tasks[k]]: tasks[k];
             var taskCallback = function (err) {
                 if (err) {
@@ -426,7 +427,7 @@
             var ready = function () {
                 return _reduce(requires, function (a, x) {
                     return (a && results.hasOwnProperty(x));
-                }, true) && !results.hasOwnProperty(k);
+                }, true) && !fired;
             };
             if (ready()) {
                 task[task.length - 1](taskCallback, results);
@@ -435,6 +436,7 @@
                 var listener = function () {
                     if (ready()) {
                         removeListener(listener);
+                        fired = true;
                         task[task.length - 1](taskCallback, results);
                     }
                 };
diff --git a/test/test-async.js b/test/test-async.js
index 69390fa..6cc06e2 100644
--- a/test/test-async.js
+++ b/test/test-async.js
@@ -91,12 +91,18 @@ exports['auto'] = function(test){
             callback();
         }],
         task5: ['task2', function(callback){
-            callOrder.push('task5');
+            setTimeout(function(){
+              callOrder.push('task5');
+              callback();
+            }, 0);
+        }],
+        task6: ['task2', function(callback){
+            callOrder.push('task6');
             callback();
         }]
     },
     function(err){
-        test.same(callOrder, ['task2','task5','task3','task1','task4']);
+        test.same(callOrder, ['task2','task6','task3','task5','task1','task4']);
         test.done();
     });
 };