diff --git a/src/setupCommands.js b/src/setupCommands.js
index ab91807..64a12e6 100644
--- a/src/setupCommands.js
+++ b/src/setupCommands.js
@@ -12,6 +12,10 @@ module.exports = function(Class) {
         args[i] = arguments[i];
       }
 
+      if (args.length > 0 && typeof args[args.length - 1] === 'undefined') {
+        args.pop();
+      }
+
       this[fn](cmd, conf, args);
       return this;
     };
diff --git a/test/miscCommands.js b/test/miscCommands.js
index e0a2681..11247cd 100644
--- a/test/miscCommands.js
+++ b/test/miscCommands.js
@@ -1,6 +1,6 @@
 'use strict';
 // not really tests but being used to ensure things are working
-var RedisClustr = require('../src/redisClustr');
+var RedisClustr = require('../src/RedisClustr');
 
 var c = new RedisClustr({
   servers: [
@@ -32,6 +32,18 @@ c.eval('redis.call("set", KEYS[1], ARGV[1]); return redis.call("get", KEYS[1]);'
   console.log('eval', err, resp);
 });
 
+function delKey(callback) {
+  c.del('whateverkey', callback);
+}
+
+delKey(function(err) {
+  if (err) return console.error('del error', err);
+
+  console.log('del');
+});
+
+delKey();
+
 var todo = [
   function(done) {
     var m = c.multi();