diff --git a/test/Twig/Tests/Loader/FilesystemTest.php b/test/Twig/Tests/Loader/FilesystemTest.php
index e07f374a3..604b717cc 100644
--- a/test/Twig/Tests/Loader/FilesystemTest.php
+++ b/test/Twig/Tests/Loader/FilesystemTest.php
@@ -77,10 +77,8 @@ class Twig_Tests_Loader_FilesystemTest extends PHPUnit_Framework_TestCase
             $basePath.'/named_ter',
         ), $loader->getPaths('named'));
 
-        $this->assertEquals(
-            realpath($basePath.'/named_quater/named_absolute.html'),
-            realpath($loader->getCacheKey('@named/named_absolute.html'))
-        );
+        // do not use realpath here as it would make the test unuseful
+        $this->assertEquals(str_replace('\\', '/', $basePath.'/named_quater/named_absolute.html'), str_replace('\\', '/', $loader->getCacheKey('@named/named_absolute.html')));
         $this->assertEquals("path (final)\n", $loader->getSource('index.html'));
         $this->assertEquals("path (final)\n", $loader->getSource('@__main__/index.html'));
         $this->assertEquals("named path (final)\n", $loader->getSource('@named/index.html'));