diff --git a/spec/core/ExceptionFormatterSpec.js b/spec/core/ExceptionFormatterSpec.js
index f718406b..c62e45c2 100644
--- a/spec/core/ExceptionFormatterSpec.js
+++ b/spec/core/ExceptionFormatterSpec.js
@@ -41,7 +41,8 @@ describe("ExceptionFormatter", function() {
 
   describe("#stack", function() {
     it("formats stack traces from Webkit, Firefox or node.js", function() {
-      var error = new Error("an error");
+      var error;
+      try { throw new Error("an error") } catch(e) { error = e; };
       expect(new j$.ExceptionFormatter().stack(error)).toMatch(/ExceptionFormatterSpec\.js.*\d+/)
     });