Only initiate the parser once per instance and throw sync if the parser can't be found

test/node_redis.spec.js

@@ -10,17 +10,15 @@ describe("The node_redis client", function () {
 
     describe("testing parser existence", function () {
         it('throws on non-existence', function (done) {
-            var mochaListener = helper.removeMochaListener();
-
-            process.once('uncaughtException', function (err) {
-                process.on('uncaughtException', mochaListener);
+            try {
+                redis.createClient({
+                    parser: 'nonExistingParser'
+                });
+                done(new Error('test failed'));
+            } catch (err) {
                 assert.equal(err.message, 'Couldn\'t find named parser nonExistingParser on this system');
-                return done();
-            });
-
-            redis.createClient({
-                parser: 'nonExistingParser'
-            });
+                done();
+            }
         });
     });