diff --git a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/ProxyDumperTest.php b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/ProxyDumperTest.php
index 0b98419f1620..6d86bd24d2d1 100644
--- a/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/ProxyDumperTest.php
+++ b/src/Symfony/Bridge/ProxyManager/Tests/LazyProxy/PhpDumper/ProxyDumperTest.php
@@ -86,7 +86,7 @@ public function getProxyCandidates()
         $definitions = array(
             array(new Definition(__CLASS__), true),
             array(new Definition('stdClass'), true),
-            array(new Definition('foo'.uniqid()), false),
+            array(new Definition(uniqid('foo', true)), false),
             array(new Definition(), false),
         );
 
diff --git a/src/Symfony/Bridge/Twig/Command/LintCommand.php b/src/Symfony/Bridge/Twig/Command/LintCommand.php
index 4d8b9ce1691f..df603f93fddd 100644
--- a/src/Symfony/Bridge/Twig/Command/LintCommand.php
+++ b/src/Symfony/Bridge/Twig/Command/LintCommand.php
@@ -109,7 +109,7 @@ protected function execute(InputInterface $input, OutputInterface $output)
                 $template .= fread(STDIN, 1024);
             }
 
-            return $this->display($input, $output, array($this->validate($twig, $template, uniqid('sf_'))));
+            return $this->display($input, $output, array($this->validate($twig, $template, uniqid('sf_', true))));
         }
 
         $filesInfo = $this->getFilesInfo($twig, $filenames);