diff --git a/cake/dispatcher.php b/cake/dispatcher.php
index 17365c825..1b56a8605 100644
--- a/cake/dispatcher.php
+++ b/cake/dispatcher.php
@@ -172,7 +172,7 @@ class Dispatcher extends Object {
 			$missingAction = true;
 		}
 
-		if (in_array('return', array_keys($this->params)) && $this->params['return'] == 1) {
+		if (array_key_exists('return', $this->params) && $this->params['return'] == 1) {
 			$controller->autoRender = false;
 		}
 		$controller->base = $this->base;
@@ -241,10 +241,10 @@ class Dispatcher extends Object {
  */
 	function _invoke(&$controller, $params, $missingAction = false) {
 		$classVars = get_object_vars($controller);
-		if ($missingAction && in_array('scaffold', array_keys($classVars))) {
+		if ($missingAction && array_key_exists('scaffold', $classVars)) {
 			App::import('Core', 'Scaffold');
 			return new Scaffold($controller, $params);
-		} elseif ($missingAction && !in_array('scaffold', array_keys($classVars))) {
+		} elseif ($missingAction && !array_key_exists('scaffold', $classVars)) {
 			return $this->cakeError('missingAction', array(
 				array(
 					'className' => Inflector::camelize($params['controller']."Controller"),
diff --git a/cake/libs/view/view.php b/cake/libs/view/view.php
index 1d0f6d4c2..4c27edb80 100644
--- a/cake/libs/view/view.php
+++ b/cake/libs/view/view.php
@@ -704,7 +704,7 @@ class View extends Object {
 			}
 			$helperCn = $helper . 'Helper';
 
-			if (in_array($helper, array_keys($loaded)) !== true) {
+			if (array_key_exists($helper, $loaded) !== true) {
 				if (!class_exists($helperCn)) {
 					if (is_null($plugin) || !App::import('Helper', $plugin . '.' . $helper)) {
 						if (!App::import('Helper', $helper)) {
diff --git a/cake/tests/cases/dispatcher.test.php b/cake/tests/cases/dispatcher.test.php
index bac6fee97..2c2beb7f5 100644
--- a/cake/tests/cases/dispatcher.test.php
+++ b/cake/tests/cases/dispatcher.test.php
@@ -47,10 +47,10 @@ class TestDispatcher extends Dispatcher {
 	function _invoke(&$controller, $params, $missingAction) {
 		$controller->params =& $params;
 		$classVars = get_object_vars($controller);
-		if ($missingAction && in_array('scaffold', array_keys($classVars))) {
+		if ($missingAction && array_key_exists('scaffold', $classVars)) {
 			uses('controller'. DS . 'scaffold');
 			return new Scaffold($controller, $params);
-		} elseif ($missingAction && !in_array('scaffold', array_keys($classVars))) {
+		} elseif ($missingAction && !array_key_exists('scaffold', $classVars)) {
 				return $this->cakeError('missingAction', array(
 					array(
 						'className' => Inflector::camelize($params['controller']."Controller"),