diff --git a/modules/@angular/router/karma-test-shim.js b/modules/@angular/router/karma-test-shim.js
index 9b71826f28..2376efb5cd 100644
--- a/modules/@angular/router/karma-test-shim.js
+++ b/modules/@angular/router/karma-test-shim.js
@@ -71,4 +71,4 @@ Promise
       return Promise.all(
           allSpecFiles.map(function(moduleName) { return System.import(moduleName); }));
     })
-    .then(__karma__.start, __karma__.error);
+    .then(__karma__.start, (v) => console.error(v));
diff --git a/test-main.js b/test-main.js
index 5507d941bd..34a54c26ca 100644
--- a/test-main.js
+++ b/test-main.js
@@ -82,9 +82,7 @@ System.import('@angular/core/testing')
                                });
                              }));
     })
-    .then(
-        function() { __karma__.start(); },
-        function(error) { __karma__.error(error.stack || error); });
+    .then(function() { __karma__.start(); }, function(error) { console.error(error); });
 
 
 function onlySpecFiles(path) {