diff --git a/lib/container.js b/lib/container.js
index 75547ae..91006b5 100644
--- a/lib/container.js
+++ b/lib/container.js
@@ -81,6 +81,18 @@ Container.prototype.create = function(id, parent) {
   return comp.create(this);
 }
 
+Container.prototype.mock = function(id, mock_id) {
+  this._loadModule(mock_id);
+
+  var mock = this._o[mock_id];
+  if (!mock) {
+    throw new Error("Unable to create component '" + mock_id + "'");
+  }
+
+  this._o[ id ] = mock;
+  delete this._o[ mock_id ];
+};
+
 Container.prototype.factory = function(id, dependencies, fn, sid) {
   if (typeof dependencies == 'function') {
     fn = dependencies;