Index: modules/simpletest/drupal_web_test_case.php
===================================================================
RCS file: /cvs/drupal/drupal/modules/simpletest/drupal_web_test_case.php,v
retrieving revision 1.182
diff -u -p -r1.182 drupal_web_test_case.php
--- modules/simpletest/drupal_web_test_case.php	15 Dec 2009 05:25:47 -0000	1.182
+++ modules/simpletest/drupal_web_test_case.php	24 Dec 2009 16:25:26 -0000
@@ -1082,10 +1082,12 @@ class DrupalWebTestCase extends DrupalTe
     // Use temporary files directory with the same prefix as the database.
     $public_files_directory  = $this->originalFileDirectory . '/simpletest/' . substr($db_prefix, 10);
     $private_files_directory = $public_files_directory . '/private';
+    $temp_files_directory    = $private_files_directory . '/temp';
 
     // Create the directories
     file_prepare_directory($public_files_directory, FILE_CREATE_DIRECTORY | FILE_MODIFY_PERMISSIONS);
     file_prepare_directory($private_files_directory, FILE_CREATE_DIRECTORY);
+    file_prepare_directory($temp_files_directory, FILE_CREATE_DIRECTORY);
 
     // Log fatal errors.
     ini_set('log_errors', 1);
@@ -1150,6 +1152,7 @@ class DrupalWebTestCase extends DrupalTe
     // Set path variables
     variable_set('file_public_path', $public_files_directory);
     variable_set('file_private_path', $private_files_directory);
+    variable_set('file_temporary_path', $temp_files_directory);
 
     // Use the test mail class instead of the default mail handler class.
     variable_set('mail_system', array('default-system' => 'TestingMailSystem'));