diff --git a/test/classes/PMA_Error_test.php b/test/classes/PMA_Error_test.php
index 43f50dc9e8f9..75d7515aabe6 100644
--- a/test/classes/PMA_Error_test.php
+++ b/test/classes/PMA_Error_test.php
@@ -79,7 +79,8 @@ public function testSetLine()
     public function testSetFile()
     {
         $this->object->setFile('./pma.txt');
-        $this->assertStringStartsWith('./../../', $this->object->getFile());
+        $this->assertStringStartsWith(implode(
+		    DIRECTORY_SEPARATOR, array('.', '..', '..')), $this->object->getFile());
     }
 
     /**