diff --git a/api.js b/api.js
index fad5c7c959..ce509eb157 100644
--- a/api.js
+++ b/api.js
@@ -160,11 +160,11 @@ Api.prototype.run = function () {
 					if (++statsCount === self.fileCount) {
 						self.emit('ready');
 
-						tests.forEach(function (test) {
-							test.run();
-						});
+						var method = self.serial ? 'mapSeries' : 'map';
 
-						deferred.resolve(Promise.all(tests));
+						deferred.resolve(Promise[method](files, function (file, index) {
+							return tests[index].run();
+						}));
 					}
 				}