diff --git a/tests/UnitTests/A_Core/Filter/FilterTest.php b/tests/UnitTests/A_Core/Filter/FilterTest.php
index 41ea54d0..00563c47 100644
--- a/tests/UnitTests/A_Core/Filter/FilterTest.php
+++ b/tests/UnitTests/A_Core/Filter/FilterTest.php
@@ -19,7 +19,7 @@ class FilterTest extends PHPUnit_Smarty
 
     public function setUp()
     {
-        $this->setUpSmarty(__DIR__);
+        $this->setUpSmarty(dirname(__FILE__));
     }
 
     public function testInit()
diff --git a/tests/UnitTests/CacheResourceTests/Memcache/CacheResourceCustomMemcacheTest.php b/tests/UnitTests/CacheResourceTests/Memcache/CacheResourceCustomMemcacheTest.php
index ee6ebc76..d8d9df1b 100644
--- a/tests/UnitTests/CacheResourceTests/Memcache/CacheResourceCustomMemcacheTest.php
+++ b/tests/UnitTests/CacheResourceTests/Memcache/CacheResourceCustomMemcacheTest.php
@@ -6,7 +6,7 @@
  * @author  Uwe Tews
  */
 
-include_once __DIR__ . '/../_shared/CacheResourceTestCommon.php';
+include_once dirname(__FILE__) . '/../_shared/CacheResourceTestCommon.php';
 
 /**
  * class for cache resource memcache tests
@@ -31,7 +31,7 @@ class CacheResourceCustomMemcacheTest extends CacheResourceTestCommon
                 $this->markTestSkipped('Memcache not available');
             }
         }
-        $this->setUpSmarty(__DIR__);
+        $this->setUpSmarty(dirname(__FILE__));
         parent::setUp();
         $this->smarty->setCachingType('memcachetest');
     }