Update invalid transaction test case

test/test.Transaction.js

@@ -339,7 +339,8 @@ describe('Transaction', function() {
             // ...by this function, so ignore if that is the case
             if (err && err.constructor.name === "AssertionError") return;
 
-            should.exist(err);
+            // There should either be an error, or the results should be false.
+            (err !== null || (!err && results === false)).should.equal(true);
           });
       });
     });