public static function tearDownAfterClass()
 {
     if (self::$isOneTimeSetup) {
         $testBase = new FunctionalTestBase();
         $testBase->setUp();
         foreach (QueueServiceFunctionalTestData::$testQueueNames as $name) {
             $testBase->safeDeleteQueue($name);
         }
         self::$isOneTimeSetup = false;
     }
     parent::tearDownAfterClass();
 }