diff --git a/test/reporters/xunit.spec.js b/test/reporters/xunit.spec.js
index 44296442e0..323db703a9 100644
--- a/test/reporters/xunit.spec.js
+++ b/test/reporters/xunit.spec.js
@@ -42,7 +42,7 @@ describe('XUnit reporter', function() {
   });
 
   describe("when 'reporterOptions.output' is provided", function() {
-    var expectedOutput = path.join('path', 'to', 'some-output');
+    var expectedOutput = path.join(path.sep, 'path', 'to', 'some-output');
     var options = {
       reporterOptions: {
         output: expectedOutput