diff --git a/tests/Composer/Test/AllFunctionalTest.php b/tests/Composer/Test/AllFunctionalTest.php
index f27d58117..39f0c23d6 100644
--- a/tests/Composer/Test/AllFunctionalTest.php
+++ b/tests/Composer/Test/AllFunctionalTest.php
@@ -60,6 +60,10 @@ class AllFunctionalTest extends \PHPUnit_Framework_TestCase
 
     public function testBuildPhar()
     {
+        if (defined('HHVM_VERSION')) {
+            $this->markTestSkipped('Building the phar does not work on HHVM.');
+        }
+        
         $fs = new Filesystem;
         $fs->removeDirectory(dirname(self::$pharPath));
         $fs->ensureDirectoryExists(dirname(self::$pharPath));