diff --git a/lib/Cake/tests/cases/libs/cache/apc.test.php b/lib/Cake/tests/cases/libs/cache/apc.test.php
index 0abd077785c..28043b908e3 100644
--- a/lib/Cake/tests/cases/libs/cache/apc.test.php
+++ b/lib/Cake/tests/cases/libs/cache/apc.test.php
@@ -16,9 +16,8 @@
  * @since         CakePHP(tm) v 1.2.0.5434
  * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
  */
-if (!class_exists('Cache')) {
-	require LIBS . 'cache.php';
-}
+
+App::uses('Cache', 'Cache');
 
 /**
  * ApcEngineTest class
diff --git a/lib/Cake/tests/cases/libs/cache/file.test.php b/lib/Cake/tests/cases/libs/cache/file.test.php
index fb6741a7a46..50d20181efa 100644
--- a/lib/Cake/tests/cases/libs/cache/file.test.php
+++ b/lib/Cake/tests/cases/libs/cache/file.test.php
@@ -16,9 +16,8 @@
  * @since         CakePHP(tm) v 1.2.0.5434
  * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
  */
-if (!class_exists('Cache')) {
-	require LIBS . 'cache.php';
-}
+
+App::uses('Cache', 'Cache');
 
 /**
  * FileEngineTest class
diff --git a/lib/Cake/tests/cases/libs/cache/memcache.test.php b/lib/Cake/tests/cases/libs/cache/memcache.test.php
index 61bcec5507c..ada9c52bcea 100644
--- a/lib/Cake/tests/cases/libs/cache/memcache.test.php
+++ b/lib/Cake/tests/cases/libs/cache/memcache.test.php
@@ -16,10 +16,9 @@
  * @since         CakePHP(tm) v 1.2.0.5434
  * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
  */
-if (!class_exists('Cache')) {
-	require LIBS . 'cache.php';
-}
-require_once LIBS . 'cache' . DS . 'memcache.php';
+
+App::uses('Cache', 'Cache');
+App::uses('MemcacheEngine', 'Cache/Engine');
 
 class TestMemcacheEngine extends MemcacheEngine {
 /**
diff --git a/lib/Cake/tests/cases/libs/cache/xcache.test.php b/lib/Cake/tests/cases/libs/cache/xcache.test.php
index eea1c4b2c24..5788118c3ee 100644
--- a/lib/Cake/tests/cases/libs/cache/xcache.test.php
+++ b/lib/Cake/tests/cases/libs/cache/xcache.test.php
@@ -16,9 +16,8 @@
  * @since         CakePHP(tm) v 1.2.0.5434
  * @license       MIT License (http://www.opensource.org/licenses/mit-license.php)
  */
-if (!class_exists('Cache')) {
-	require LIBS . 'cache.php';
-}
+
+App::uses('Cache', 'Cache');
 
 /**
  * XcacheEngineTest class