diff --git a/lib/runners/to-result.js b/lib/runners/to-result.js
index <HASH>..<HASH> 100644
--- a/lib/runners/to-result.js
+++ b/lib/runners/to-result.js
@@ -2,9 +2,10 @@
 
 var log = require('npmlog');
 
-module.exports = function toResult(launcherId, err, code, runnerProcess, config, testContext = {}) {
+module.exports = function toResult(launcherId, err, code, runnerProcess, config, testContext) {
   var logs = [];
   var message = '';
+  testContext = testContext ? testContext : {};
 
   if (err) {
     logs.push({
Make toResult compatiable with node4