diff --git a/lib/Cake/Test/Case/Console/Command/SchemaShellTest.php b/lib/Cake/Test/Case/Console/Command/SchemaShellTest.php
index e702e4b16..512d9b1bf 100644
--- a/lib/Cake/Test/Case/Console/Command/SchemaShellTest.php
+++ b/lib/Cake/Test/Case/Console/Command/SchemaShellTest.php
@@ -137,7 +137,7 @@ class SchemaShellTest extends CakeTestCase {
 	public function testStartup() {
 		$this->Shell->startup();
 		$this->assertTrue(isset($this->Shell->Schema));
-		$this->assertTrue($this->Shell->Schema instanceof CakeSchema);
+		$this->assertInstanceOf('CakeSchema', $this->Shell->Schema);
 		$this->assertEquals(Inflector::camelize(Inflector::slug(APP_DIR)), $this->Shell->Schema->name);
 		$this->assertEquals('schema.php', $this->Shell->Schema->file);
 
diff --git a/lib/Cake/Test/Case/Controller/ControllerTest.php b/lib/Cake/Test/Case/Controller/ControllerTest.php
index 63ed922d0..071a1f85e 100644
--- a/lib/Cake/Test/Case/Controller/ControllerTest.php
+++ b/lib/Cake/Test/Case/Controller/ControllerTest.php
@@ -482,8 +482,8 @@ class ControllerTest extends CakeTestCase {
 		$Controller = new Controller($request);
 		$Controller->uses = array('ControllerPost', 'ControllerComment');
 		$Controller->constructClasses();
-		$this->assertTrue($Controller->ControllerPost instanceof ControllerPost);
-		$this->assertTrue($Controller->ControllerComment instanceof ControllerComment);
+		$this->assertInstanceOf('ControllerPost', $Controller->ControllerPost);
+		$this->assertInstanceOf('ControllerComment', $Controller->ControllerComment);
 
 		$this->assertEquals('Comment', $Controller->ControllerComment->name);
 
@@ -497,7 +497,7 @@ class ControllerTest extends CakeTestCase {
 		$Controller->constructClasses();
 
 		$this->assertTrue(isset($Controller->TestPluginPost));
-		$this->assertTrue($Controller->TestPluginPost instanceof TestPluginPost);
+		$this->assertInstanceOf('TestPluginPost', $Controller->TestPluginPost);
 	}
 
 /**
diff --git a/lib/Cake/Test/Case/Routing/RouterTest.php b/lib/Cake/Test/Case/Routing/RouterTest.php
index f843bda03..f5a84c2df 100644
--- a/lib/Cake/Test/Case/Routing/RouterTest.php
+++ b/lib/Cake/Test/Case/Routing/RouterTest.php
@@ -2354,7 +2354,7 @@ class RouterTest extends CakeTestCase {
 			array('controller' => 'posts', 'action' => 'view'),
 			array('routeClass' => 'MockConnectedRoute', 'slug' => '[a-z_-]+')
 		);
-		$this->assertTrue($routes[0] instanceof MockConnectedRoute, 'Incorrect class used. %s');
+		$this->assertInstanceOf('MockConnectedRoute', $routes[0], 'Incorrect class used. %s');
 		$expected = array('controller' => 'posts', 'action' => 'view', 'slug' => 'test');
 		$routes[0]->expects($this->any())
 			->method('parse')
diff --git a/lib/Cake/Test/Case/Utility/ClassRegistryTest.php b/lib/Cake/Test/Case/Utility/ClassRegistryTest.php
index df656f652..7fa1ea818 100644
--- a/lib/Cake/Test/Case/Utility/ClassRegistryTest.php
+++ b/lib/Cake/Test/Case/Utility/ClassRegistryTest.php
@@ -136,7 +136,7 @@ class ClassRegistryTest extends CakeTestCase {
  */
 	public function testAddModel() {
 		$Tag = ClassRegistry::init('RegisterArticleTag');
-		$this->assertTrue($Tag instanceof RegisterArticleTag);
+		$this->assertInstanceOf('RegisterArticleTag', $Tag);
 
 		$TagCopy = ClassRegistry::isKeySet('RegisterArticleTag');
 		$this->assertTrue($TagCopy);
@@ -145,11 +145,11 @@ class ClassRegistryTest extends CakeTestCase {
 
 		$TagCopy = ClassRegistry::getObject('RegisterArticleTag');
 
-		$this->assertTrue($TagCopy instanceof RegisterArticleTag);
+		$this->assertInstanceOf('RegisterArticleTag', $TagCopy);
 		$this->assertSame($Tag, $TagCopy);
 
 		$NewTag = ClassRegistry::init(array('class' => 'RegisterArticleTag', 'alias' => 'NewTag'));
-		$this->assertTrue($Tag instanceof RegisterArticleTag);
+		$this->assertInstanceOf('RegisterArticleTag', $Tag);
 
 		$NewTagCopy = ClassRegistry::init(array('class' => 'RegisterArticleTag', 'alias' => 'NewTag'));
 
@@ -166,17 +166,17 @@ class ClassRegistryTest extends CakeTestCase {
 		$this->assertTrue($TagCopy->name === 'SomeOtherName');
 
 		$User = ClassRegistry::init(array('class' => 'RegisterUser', 'alias' => 'User', 'table' => false));
-		$this->assertTrue($User instanceof AppModel);
+		$this->assertInstanceOf('AppModel', $User);
 
 		$UserCopy = ClassRegistry::init(array('class' => 'RegisterUser', 'alias' => 'User', 'table' => false));
-		$this->assertTrue($UserCopy instanceof AppModel);
+		$this->assertInstanceOf('AppModel', $UserCopy);
 		$this->assertEquals($User, $UserCopy);
 
 		$Category = ClassRegistry::init(array('class' => 'RegisterCategory'));
-		$this->assertTrue($Category instanceof RegisterCategory);
+		$this->assertTrue('RegisterCategory', $Category);
 
 		$ParentCategory = ClassRegistry::init(array('class' => 'RegisterCategory', 'alias' => 'ParentCategory'));
-		$this->assertTrue($ParentCategory instanceof RegisterCategory);
+		$this->assertInstanceOf('RegisterCategory', $ParentCategory);
 		$this->assertNotSame($Category, $ParentCategory);
 
 		$this->assertNotEquals($Category->alias, $ParentCategory->alias);
@@ -193,12 +193,12 @@ class ClassRegistryTest extends CakeTestCase {
 		ClassRegistry::init('RegisterArticleTag');
 
 		$ArticleTag = ClassRegistry::getObject('RegisterArticleTag');
-		$this->assertTrue($ArticleTag instanceof RegisterArticleTag);
+		$this->assertInstanceOf('RegisterArticleTag', $ArticleTag);
 		ClassRegistry::flush();
 
 		$NoArticleTag = ClassRegistry::isKeySet('RegisterArticleTag');
 		$this->assertFalse($NoArticleTag);
-		$this->assertTrue($ArticleTag instanceof RegisterArticleTag);
+		$this->assertTrue('RegisterArticleTag', $ArticleTag);
 	}
 
 /**
@@ -233,13 +233,13 @@ class ClassRegistryTest extends CakeTestCase {
 		$this->assertTrue($Tag);
 
 		$Article = ClassRegistry::getObject('Article');
-		$this->assertTrue($Article instanceof RegisterArticle);
+		$this->assertInstanceOf('RegisterArticle', $Article);
 
 		$Featured = ClassRegistry::getObject('Featured');
-		$this->assertTrue($Featured instanceof RegisterArticleFeatured);
+		$this->assertInstanceOf('RegisterArticleFeatured', $Featured);
 
 		$Tag = ClassRegistry::getObject('Tag');
-		$this->assertTrue($Tag instanceof RegisterArticleTag);
+		$this->assertInstanceOf('RegisterArticleTag', $Tag);
 	}
 
 /**
@@ -254,15 +254,15 @@ class ClassRegistryTest extends CakeTestCase {
 		//Faking a plugin
 		CakePlugin::load('RegistryPlugin', array('path' => '/fake/path'));
 		$TestRegistryPluginModel = ClassRegistry::init('RegistryPlugin.TestRegistryPluginModel');
-		$this->assertTrue($TestRegistryPluginModel instanceof TestRegistryPluginModel);
+		$this->assertInstanceOf('TestRegistryPluginModel', $TestRegistryPluginModel);
 
 		$this->assertEquals('something_', $TestRegistryPluginModel->tablePrefix);
 
 		$PluginUser = ClassRegistry::init(array('class' => 'RegistryPlugin.RegisterUser', 'alias' => 'RegistryPluginUser', 'table' => false));
-		$this->assertTrue($PluginUser instanceof RegistryPluginAppModel);
+		$this->assertInstanceOf('RegistryPluginAppModel', $PluginUser);
 
 		$PluginUserCopy = ClassRegistry::getObject('RegistryPluginUser');
-		$this->assertTrue($PluginUserCopy instanceof RegistryPluginAppModel);
+		$this->assertInstanceOf('RegistryPluginAppModel', $PluginUserCopy);
 		$this->assertSame($PluginUser, $PluginUserCopy);
 		CakePlugin::unload();
 	}