diff --git a/tests/unit/DatabaseTestCase.php b/tests/unit/DatabaseTestCase.php
index b39c2e5..0c025e3 100644
--- a/tests/unit/DatabaseTestCase.php
+++ b/tests/unit/DatabaseTestCase.php
@@ -10,6 +10,7 @@ class DatabaseTestCase extends TestCase
 
     protected function setUp()
     {
+	    parent::setUp();
         $databases = $this->getParam('databases');
         $this->database = $databases[$this->driverName];
         $pdo_database = 'pdo_'.$this->driverName;
diff --git a/tests/unit/MysqlTestCase.php b/tests/unit/MysqlTestCase.php
index c7ef970..3c16e03 100644
--- a/tests/unit/MysqlTestCase.php
+++ b/tests/unit/MysqlTestCase.php
@@ -6,6 +6,7 @@ class MysqlTestCase extends TestCase
 {
 	protected function setUp()
 	{
+		parent::setUp();
 		if (!extension_loaded('pdo') || !extension_loaded('pdo_mysql')) {
 			$this->markTestSkipped('pdo and pdo_mysql extensions are required.');
 		}
diff --git a/tests/unit/TestCase.php b/tests/unit/TestCase.php
index fbc0da7..e83e1a8 100644
--- a/tests/unit/TestCase.php
+++ b/tests/unit/TestCase.php
@@ -2,29 +2,43 @@
 
 namespace yiiunit;
 
+/**
+ * This is the base class for all yii framework unit tests.
+ */
 class TestCase extends \yii\test\TestCase
 {
 	public static $params;
 
-	protected function setUp() {
-		parent::setUp();
-	}
-
+	/**
+	 * Clean up after test.
+	 * By default the application created with [[mockApplication]] will be destroyed.
+	 */
 	protected function tearDown()
 	{
 		parent::tearDown();
-		$this->destroyApp();
+		$this->destroyApplication();
 	}
-	
-	public function getParam($name,$default=null)
+
+	/**
+	 * Returns a test configuration param from /data/config.php
+	 * @param string $name params name
+	 * @param mixed $default default value to use when param is not set.
+	 * @return mixed the value of the configuration param
+	 */
+	public function getParam($name, $default = null)
 	{
 		if (self::$params === null) {
 			self::$params = require(__DIR__ . '/data/config.php');
 		}
 		return isset(self::$params[$name]) ? self::$params[$name] : $default;
 	}
-	
-	protected function mockApplication($requiredConfig=array())
+
+	/**
+	 * Populates Yii::$app with a new application
+	 * The application will be destroyed on tearDown() automatically.
+	 * @param array $config The application configuration, if needed
+	 */
+	protected function mockApplication($config=array())
 	{
 		static $defaultConfig = array(
 			'id' => 'testapp',
@@ -32,10 +46,13 @@ class TestCase extends \yii\test\TestCase
 		);
 		
 		$appClass = $this->getParam( 'appClass', '\yii\web\Application' );
-		new $appClass(array_merge($defaultConfig,$requiredConfig));
+		new $appClass(array_merge($defaultConfig,$config));
 	}
 	
-	protected function destroyApp()
+	/**
+	 * Destroys application in Yii::$app by setting it to null.
+	 */
+	protected function destroyApplication()
 	{
 		\Yii::$app = null;
 	}
diff --git a/tests/unit/framework/YiiBaseTest.php b/tests/unit/framework/YiiBaseTest.php
index 4ebf45c..bc31c0a 100644
--- a/tests/unit/framework/YiiBaseTest.php
+++ b/tests/unit/framework/YiiBaseTest.php
@@ -11,13 +11,15 @@ class YiiBaseTest extends TestCase
 {
 	public $aliases;
 
-	public function setUp()
+	protected function setUp()
 	{
+		parent::setUp();
 		$this->aliases = Yii::$aliases;
 	}
 
-	public function tearDown()
+	protected function tearDown()
 	{
+		parent::tearDown();
 		Yii::$aliases = $this->aliases;
 	}
 
diff --git a/tests/unit/framework/base/ComponentTest.php b/tests/unit/framework/base/ComponentTest.php
index 7c860e3..f1c0ba9 100644
--- a/tests/unit/framework/base/ComponentTest.php
+++ b/tests/unit/framework/base/ComponentTest.php
@@ -24,13 +24,15 @@ class ComponentTest extends TestCase
 	 */
 	protected $component;
 
-	public function setUp()
+	protected function setUp()
 	{
+		parent::setUp();
 		$this->component = new NewComponent();
 	}
 
-	public function tearDown()
+	protected function tearDown()
 	{
+		parent::tearDown();
 		$this->component = null;
 	}
 
diff --git a/tests/unit/framework/base/DictionaryTest.php b/tests/unit/framework/base/DictionaryTest.php
index 882ffc2..9c47c29 100644
--- a/tests/unit/framework/base/DictionaryTest.php
+++ b/tests/unit/framework/base/DictionaryTest.php
@@ -19,8 +19,9 @@ class DictionaryTest extends \yiiunit\TestCase
 	protected $item2;
 	protected $item3;
 
-	public function setUp()
+	protected function setUp()
 	{
+		parent::setUp();
 		$this->dictionary = new Dictionary;
 		$this->item1 = new MapItem;
 		$this->item2 = new MapItem;
@@ -29,8 +30,9 @@ class DictionaryTest extends \yiiunit\TestCase
 		$this->dictionary->add('key2', $this->item2);
 	}
 
-	public function tearDown()
+	protected function tearDown()
 	{
+		parent::tearDown();
 		$this->dictionary = null;
 		$this->item1 = null;
 		$this->item2 = null;
diff --git a/tests/unit/framework/base/ObjectTest.php b/tests/unit/framework/base/ObjectTest.php
index 14856e2..df002cc 100644
--- a/tests/unit/framework/base/ObjectTest.php
+++ b/tests/unit/framework/base/ObjectTest.php
@@ -14,13 +14,15 @@ class ObjectTest extends TestCase
 	 */
 	protected $object;
 
-	public function setUp()
+	protected function setUp()
 	{
+		parent::setUp();
 		$this->object = new NewObject;
 	}
 
-	public function tearDown()
+	protected function tearDown()
 	{
+		parent::tearDown();
 		$this->object = null;
 	}
 
diff --git a/tests/unit/framework/base/VectorTest.php b/tests/unit/framework/base/VectorTest.php
index b14d5dc..6d6bd23 100644
--- a/tests/unit/framework/base/VectorTest.php
+++ b/tests/unit/framework/base/VectorTest.php
@@ -19,8 +19,9 @@ class VectorTest extends \yiiunit\TestCase
 	protected $item2;
 	protected $item3;
 
-	public function setUp()
+	protected function setUp()
 	{
+		parent::setUp();
 		$this->vector = new Vector;
 		$this->item1 = new ListItem;
 		$this->item2 = new ListItem;
@@ -29,8 +30,9 @@ class VectorTest extends \yiiunit\TestCase
 		$this->vector->add($this->item2);
 	}
 
-	public function tearDown()
+	protected function tearDown()
 	{
+		parent::tearDown();
 		$this->vector = null;
 		$this->item1 = null;
 		$this->item2 = null;
diff --git a/tests/unit/framework/db/ActiveRecordTest.php b/tests/unit/framework/db/ActiveRecordTest.php
index e337a5d..f86ca8e 100644
--- a/tests/unit/framework/db/ActiveRecordTest.php
+++ b/tests/unit/framework/db/ActiveRecordTest.php
@@ -12,7 +12,7 @@ use yiiunit\data\ar\Item;
 
 class ActiveRecordTest extends \yiiunit\DatabaseTestCase
 {
-	public function setUp()
+	protected function setUp()
 	{
         parent::setUp();
 		ActiveRecord::$db = $this->getConnection();
diff --git a/tests/unit/framework/db/sqlite/SqliteActiveRecordTest.php b/tests/unit/framework/db/sqlite/SqliteActiveRecordTest.php
index 539e879..4779f85 100644
--- a/tests/unit/framework/db/sqlite/SqliteActiveRecordTest.php
+++ b/tests/unit/framework/db/sqlite/SqliteActiveRecordTest.php
@@ -4,7 +4,7 @@ namespace yiiunit\framework\db\sqlite;
 
 class SqliteActiveRecordTest extends \yiiunit\framework\db\ActiveRecordTest
 {
-    public function setUp()
+    protected function setUp()
     {
         $this->driverName = 'sqlite';
         parent::setUp();
diff --git a/tests/unit/framework/db/sqlite/SqliteCommandTest.php b/tests/unit/framework/db/sqlite/SqliteCommandTest.php
index 4110cd3..3898aa2 100644
--- a/tests/unit/framework/db/sqlite/SqliteCommandTest.php
+++ b/tests/unit/framework/db/sqlite/SqliteCommandTest.php
@@ -4,13 +4,13 @@ namespace yiiunit\framework\db\sqlite;
 
 class SqliteCommandTest extends \yiiunit\framework\db\CommandTest
 {
-    public function setUp()
+    protected function setUp()
     {
         $this->driverName = 'sqlite';
         parent::setUp();
     }
 
-    function testAutoQuoting()
+    public function testAutoQuoting()
     {
         $db = $this->getConnection(false);
 
diff --git a/tests/unit/framework/db/sqlite/SqliteConnectionTest.php b/tests/unit/framework/db/sqlite/SqliteConnectionTest.php
index eeb5aae..5685137 100644
--- a/tests/unit/framework/db/sqlite/SqliteConnectionTest.php
+++ b/tests/unit/framework/db/sqlite/SqliteConnectionTest.php
@@ -4,13 +4,13 @@ namespace yiiunit\framework\db\sqlite;
 
 class SqliteConnectionTest extends \yiiunit\framework\db\ConnectionTest
 {
-    public function setUp()
+    protected function setUp()
     {
         $this->driverName = 'sqlite';
         parent::setUp();
     }
 
-    function testConstruct()
+    public function testConstruct()
     {
         $connection = $this->getConnection(false);
         $params = $this->database;
@@ -18,7 +18,7 @@ class SqliteConnectionTest extends \yiiunit\framework\db\ConnectionTest
         $this->assertEquals($params['dsn'], $connection->dsn);
     }
 
-    function testQuoteValue()
+    public function testQuoteValue()
     {
         $connection = $this->getConnection(false);
         $this->assertEquals(123, $connection->quoteValue(123));
@@ -26,7 +26,7 @@ class SqliteConnectionTest extends \yiiunit\framework\db\ConnectionTest
         $this->assertEquals("'It''s interesting'", $connection->quoteValue("It's interesting"));
     }
 
-    function testQuoteTableName()
+    public function testQuoteTableName()
     {
         $connection = $this->getConnection(false);
         $this->assertEquals("'table'", $connection->quoteTableName('table'));
@@ -35,7 +35,7 @@ class SqliteConnectionTest extends \yiiunit\framework\db\ConnectionTest
         $this->assertEquals('(table)', $connection->quoteTableName('(table)'));
     }
 
-    function testQuoteColumnName()
+    public function testQuoteColumnName()
     {
         $connection = $this->getConnection(false);
         $this->assertEquals('"column"', $connection->quoteColumnName('column'));
diff --git a/tests/unit/framework/db/sqlite/SqliteQueryTest.php b/tests/unit/framework/db/sqlite/SqliteQueryTest.php
index f00e59e..2a3a831 100644
--- a/tests/unit/framework/db/sqlite/SqliteQueryTest.php
+++ b/tests/unit/framework/db/sqlite/SqliteQueryTest.php
@@ -12,7 +12,7 @@ namespace yiiunit\framework\db\sqlite;
 
 class SqliteQueryTest extends \yiiunit\framework\db\QueryTest
 {
-    public function setUp()
+    protected function setUp()
     {
         $this->driverName = 'sqlite';
         parent::setUp();
diff --git a/tests/unit/framework/helpers/HtmlTest.php b/tests/unit/framework/helpers/HtmlTest.php
index 294cae0..2311321 100644
--- a/tests/unit/framework/helpers/HtmlTest.php
+++ b/tests/unit/framework/helpers/HtmlTest.php
@@ -8,8 +8,9 @@ use yiiunit\TestCase;
 
 class HtmlTest extends TestCase
 {
-	public function setUp()
+	protected function setUp()
 	{
+		parent::setUp();
 		$this->mockApplication(array(
 			'components' => array(
 				'request' => array(
diff --git a/tests/unit/framework/helpers/VarDumperTest.php b/tests/unit/framework/helpers/VarDumperTest.php
index a797121..e734863 100644
--- a/tests/unit/framework/helpers/VarDumperTest.php
+++ b/tests/unit/framework/helpers/VarDumperTest.php
@@ -7,6 +7,9 @@ class VarDumperTest extends \yii\test\TestCase
 	public function testDumpObject()
 	{
 		$obj = new \StdClass();
+		ob_start();
 		VarDumper::dump($obj);
+		$this->assertEquals("stdClass#1\n(\n)", ob_get_contents());
+		ob_end_clean();
 	}
 }
diff --git a/tests/unit/framework/rbac/PhpManagerTest.php b/tests/unit/framework/rbac/PhpManagerTest.php
index 69fdd41..d5ab41b 100644
--- a/tests/unit/framework/rbac/PhpManagerTest.php
+++ b/tests/unit/framework/rbac/PhpManagerTest.php
@@ -5,12 +5,14 @@ namespace yiiunit\framework\rbac;
 use Yii;
 use yii\rbac\PhpManager;
 
-require_once(__DIR__ . '/ManagerTestBase.php');
+//require_once(__DIR__ . '/ManagerTestBase.php');
 
 class PhpManagerTest extends ManagerTestBase
 {
-	public function setUp()
+	protected function setUp()
 	{
+		parent::setUp();
+		$this->mockApplication();
 		$authFile = Yii::$app->getRuntimePath() . '/rbac.php';
 		@unlink($authFile);
 		$this->auth = new PhpManager;
@@ -19,8 +21,9 @@ class PhpManagerTest extends ManagerTestBase
 		$this->prepareData();
 	}
 
-	public function tearDown()
+	protected function tearDown()
 	{
+		parent::tearDown();
 		@unlink($this->auth->authFile);
 	}