diff --git a/lib/Data/AbstractData.php b/lib/Data/AbstractData.php
index 5631d87..688954e 100644
--- a/lib/Data/AbstractData.php
+++ b/lib/Data/AbstractData.php
@@ -13,7 +13,7 @@
 namespace PrivateBin\Data;
 
 /**
- * privatebin_abstract
+ * AbstractData
  *
  * Abstract model for PrivateBin data access, implemented as a singleton.
  */
@@ -24,7 +24,7 @@ abstract class AbstractData
      *
      * @access protected
      * @static
-     * @var privatebin_abstract
+     * @var AbstractData
      */
     protected static $_instance = null;
 
diff --git a/lib/Model/AbstractModel.php b/lib/Model/AbstractModel.php
index 767e7d1..7f3c669 100644
--- a/lib/Model/AbstractModel.php
+++ b/lib/Model/AbstractModel.php
@@ -45,7 +45,7 @@ abstract class AbstractModel
      * Configuration.
      *
      * @access protected
-     * @var configuration
+     * @var Configuration
      */
     protected $_conf;
 
@@ -53,7 +53,7 @@ abstract class AbstractModel
      * Data storage.
      *
      * @access protected
-     * @var privatebin_abstract
+     * @var AbstractData
      */
     protected $_store;
 
@@ -61,11 +61,11 @@ abstract class AbstractModel
      * Instance constructor.
      *
      * @access public
-     * @param  configuration $configuration
-     * @param  privatebin_abstract $storage
+     * @param  Configuration $configuration
+     * @param  AbstractData $storage
      * @return void
      */
-    public function __construct(configuration $configuration, AbstractData $storage)
+    public function __construct(Configuration $configuration, AbstractData $storage)
     {
         $this->_conf = $configuration;
         $this->_store = $storage;
diff --git a/lib/Persistence/PurgeLimiter.php b/lib/Persistence/PurgeLimiter.php
index c76a4d9..e52d43c 100644
--- a/lib/Persistence/PurgeLimiter.php
+++ b/lib/Persistence/PurgeLimiter.php
@@ -74,12 +74,9 @@ class PurgeLimiter extends AbstractPersistence
 
         $file = 'purge_limiter.php';
         $now = time();
+        $content = '<?php' . PHP_EOL . '$GLOBALS[\'purge_limiter\'] = ' . $now . ';' . PHP_EOL;
         if (!self::_exists($file)) {
-            self::_store(
-                $file,
-                '<?php' . PHP_EOL .
-                '$GLOBALS[\'purge_limiter\'] = ' . $now . ';' . PHP_EOL
-            );
+            self::_store($file, $content);
         }
 
         $path = self::getPath($file);
@@ -90,11 +87,7 @@ class PurgeLimiter extends AbstractPersistence
             $result = false;
         } else {
             $result = true;
-            self::_store(
-                $file,
-                '<?php' . PHP_EOL .
-                '$GLOBALS[\'purge_limiter\'] = ' . $now . ';' . PHP_EOL
-            );
+            self::_store($file, $content);
         }
         return $result;
     }
diff --git a/tst/ModelTest.php b/tst/ModelTest.php
index a91e70d..6213690 100644
--- a/tst/ModelTest.php
+++ b/tst/ModelTest.php
@@ -4,6 +4,7 @@ use PrivateBin\Configuration;
 use PrivateBin\Data\Database;
 use PrivateBin\Model;
 use PrivateBin\Model\Paste;
+use PrivateBin\Persistence\ServerSalt;
 use PrivateBin\Vizhash16x16;
 
 class ModelTest extends PHPUnit_Framework_TestCase
@@ -12,10 +13,15 @@ class ModelTest extends PHPUnit_Framework_TestCase
 
     private $_model;
 
+    protected $_path;
+
     public function setUp()
     {
         /* Setup Routine */
         Helper::confRestore();
+        $this->_path = sys_get_temp_dir() . DIRECTORY_SEPARATOR . 'privatebin_data';
+        if (!is_dir($this->_path)) mkdir($this->_path);
+        ServerSalt::setPath($this->_path);
         $options = parse_ini_file(CONF, true);
         $options['purge']['limit'] = 0;
         $options['model'] = array(
@@ -37,6 +43,8 @@ class ModelTest extends PHPUnit_Framework_TestCase
     public function tearDown()
     {
         /* Tear Down Routine */
+        Helper::confRestore();
+        Helper::rmDir($this->_path);
     }
 
     public function testBasicWorkflow()