diff --git a/test/Twig/Tests/ErrorTest.php b/test/Twig/Tests/ErrorTest.php
index c62a55d56a5..62578f31843 100644
--- a/test/Twig/Tests/ErrorTest.php
+++ b/test/Twig/Tests/ErrorTest.php
@@ -210,14 +210,14 @@ public function getErroredTemplates()
 
     public function testTwigLeakOutputInDebugMode()
     {
-        $output = exec(sprintf('%s %s debug', \PHP_BINARY, __DIR__.'/Fixtures/errors/leak-output.php'));
+        $output = exec(sprintf('%s %s debug', \PHP_BINARY, escapeshellarg(__DIR__.'/Fixtures/errors/leak-output.php')));
 
         $this->assertSame('Hello OOPS', $output);
     }
 
     public function testDoesNotTwigLeakOutput()
     {
-        $output = exec(sprintf('%s %s', \PHP_BINARY, __DIR__.'/Fixtures/errors/leak-output.php'));
+        $output = exec(sprintf('%s %s', \PHP_BINARY, escapeshellarg(__DIR__.'/Fixtures/errors/leak-output.php')));
 
         $this->assertSame('', $output);
     }