diff --git a/tests/AcquiaCliApplicationTest.php b/tests/AcquiaCliApplicationTest.php
index ef5de13..833faa4 100644
--- a/tests/AcquiaCliApplicationTest.php
+++ b/tests/AcquiaCliApplicationTest.php
@@ -58,7 +58,7 @@ public function testMissingVersion()
     {
         $versionFile = sprintf('%s/VERSION', $this->root);
         $versionFileBak = sprintf('%s.bak', $versionFile);
-        $fileMoved = rename($versionFile, $versionFileBak);
+        rename($versionFile, $versionFileBak);
 
         try {
             $command = ['--version'];