diff --git a/test/unit/mocha.spec.js b/test/unit/mocha.spec.js
index 2511b1204d..e8e6295b52 100644
--- a/test/unit/mocha.spec.js
+++ b/test/unit/mocha.spec.js
@@ -55,6 +55,15 @@ describe('Mocha', function() {
       mocha.run(done);
     });
   });
+  
+  describe('.reporter("xunit").run(fn)', function() {
+    it('should not raise errors if callback was not provided', function() {
+        var mocha = new Mocha();
+        expect(function() {
+            mocha.reporter('xunit').run();
+        }, 'not to throw');
+    });
+  });
 
   describe('.addFile()', function() {
     it('should add the given file to the files array', function() {