diff --git a/src/Symfony/Component/VarDumper/Test/VarDumperTestCase.php b/src/Symfony/Component/VarDumper/Test/VarDumperTestCase.php
index 42a915e8ed..565514c97e 100644
--- a/src/Symfony/Component/VarDumper/Test/VarDumperTestCase.php
+++ b/src/Symfony/Component/VarDumper/Test/VarDumperTestCase.php
@@ -36,8 +36,7 @@ abstract class VarDumperTestCase extends \PHPUnit_Framework_TestCase
         $dumper = new CliDumper($h);
         $dumper->setColors(false);
         $dumper->dump($cloner->cloneVar($data)->withRefHandles(false));
-        fseek($h, 0);
-        $data = stream_get_contents($h);
+        $data = stream_get_contents($h, -1, 0);
         fclose($h);
 
         return $data;
diff --git a/src/Symfony/Component/VarDumper/Test/VarDumperTestTrait.php b/src/Symfony/Component/VarDumper/Test/VarDumperTestTrait.php
index 130447bcf6..301962941d 100644
--- a/src/Symfony/Component/VarDumper/Test/VarDumperTestTrait.php
+++ b/src/Symfony/Component/VarDumper/Test/VarDumperTestTrait.php
@@ -36,8 +36,7 @@ trait VarDumperTestTrait
         $dumper = new CliDumper($h);
         $dumper->setColors(false);
         $dumper->dump($cloner->cloneVar($data)->withRefHandles(false));
-        fseek($h, 0);
-        $data = stream_get_contents($h);
+        $data = stream_get_contents($h, -1, 0);
         fclose($h);
 
         return $data;