diff --git a/lib/Cake/Test/Case/Controller/Component/CookieComponentTest.php b/lib/Cake/Test/Case/Controller/Component/CookieComponentTest.php
index 05f0171dc3a..e6c988af72c 100644
--- a/lib/Cake/Test/Case/Controller/Component/CookieComponentTest.php
+++ b/lib/Cake/Test/Case/Controller/Component/CookieComponentTest.php
@@ -519,8 +519,8 @@ public function testDeleteRemovesChildren() {
  * @return void
  */
 	function testDeleteChildrenNotExist() {
-		$this->assertNull($this->Controller->Cookie->delete('NotFound'));
-		$this->assertNull($this->Controller->Cookie->delete('Not.Found'));
+		$this->assertNull($this->Cookie->delete('NotFound'));
+		$this->assertNull($this->Cookie->delete('Not.Found'));
 	}
 
 /**
diff --git a/lib/Cake/Test/Case/View/MediaViewTest.php b/lib/Cake/Test/Case/View/MediaViewTest.php
index 9e299d1812e..fa49cd79220 100644
--- a/lib/Cake/Test/Case/View/MediaViewTest.php
+++ b/lib/Cake/Test/Case/View/MediaViewTest.php
@@ -370,11 +370,16 @@ function testRenderUpperExtesnion() {
 			'extension' => 'JPG',
 		);
 
-		$result = $this->MediaView->render();
+		$this->MediaView->response->expects($this->any())
+			->method('type')
+			->with('jpg')
+			->will($this->returnArgument(0));
 
-		$fileName = TEST_CAKE_CORE_INCLUDE_PATH . 'tests' . DS . 'test_app' . DS . 'vendors' . DS .'img' . DS . 'test_2.JPG';
-		$file = file_get_contents($fileName, 'r');
-		$this->assertEqual(base64_encode($output), base64_encode($file));
+		$this->MediaView->expects($this->at(0))
+			->method('_isActive')
+			->will($this->returnValue(true));
+
+		$this->MediaView->render();
 	}
 
 }
diff --git a/lib/Cake/Utility/Validation.php b/lib/Cake/Utility/Validation.php
index 2872d3f6812..abdb7d18c3b 100644
--- a/lib/Cake/Utility/Validation.php
+++ b/lib/Cake/Utility/Validation.php
@@ -18,6 +18,10 @@
  */
 
 App::uses('Multibyte', 'I18n');
+// Load multibyte if the extension is missing.
+if (!function_exists('mb_strlen')) {
+	class_exists('Multibyte');
+}
 
 /**
  * Offers different validation methods.
diff --git a/lib/Cake/View/Helper/TextHelper.php b/lib/Cake/View/Helper/TextHelper.php
index c5f5fa8d206..4b7f0540830 100644
--- a/lib/Cake/View/Helper/TextHelper.php
+++ b/lib/Cake/View/Helper/TextHelper.php
@@ -224,6 +224,10 @@ public function truncate($text, $length = 100, $options = array()) {
 		$options = array_merge($default, $options);
 		extract($options);
 
+		if (!function_exists('mb_strlen')) {
+			class_exists('Multibyte');
+		}
+
 		if ($html) {
 			if (mb_strlen(preg_replace('/<.*?>/', '', $text)) <= $length) {
 				return $text;