Index: modules/simpletest/drupal_web_test_case.php
===================================================================
RCS file: /cvs/drupal/drupal/modules/simpletest/drupal_web_test_case.php,v
retrieving revision 1.123
diff -u -p -r1.123 drupal_web_test_case.php
--- modules/simpletest/drupal_web_test_case.php	8 Jul 2009 07:23:23 -0000	1.123
+++ modules/simpletest/drupal_web_test_case.php	9 Jul 2009 20:07:18 -0000
@@ -913,7 +913,7 @@ class DrupalWebTestCase extends DrupalTe
    *   TRUE or FALSE depending on whether the permissions are valid.
    */
   protected function checkPermissions(array $permissions, $reset = FALSE) {
-    static $available;
+    $available = &drupal_static(__FUNCTION__);
 
     if (!isset($available) || $reset) {
       $available = array_keys(module_invoke_all('permission'));
Index: modules/simpletest/simpletest.pages.inc
===================================================================
RCS file: /cvs/drupal/drupal/modules/simpletest/simpletest.pages.inc,v
retrieving revision 1.7
diff -u -p -r1.7 simpletest.pages.inc
--- modules/simpletest/simpletest.pages.inc	8 Jul 2009 07:23:23 -0000	1.7
+++ modules/simpletest/simpletest.pages.inc	9 Jul 2009 20:07:18 -0000
@@ -390,6 +390,7 @@ function simpletest_result_get($test_id)
  * @return HTML image or false.
  */
 function simpletest_result_status_image($status) {
+  // $map does not use drupal_static() as its value never changes.
   static $map;
 
   if (!isset($map)) {
Index: modules/simpletest/tests/file.test
===================================================================
RCS file: /cvs/drupal/drupal/modules/simpletest/tests/file.test,v
retrieving revision 1.32
diff -u -p -r1.32 file.test
--- modules/simpletest/tests/file.test	2 Jun 2009 13:42:40 -0000	1.32
+++ modules/simpletest/tests/file.test	9 Jul 2009 20:07:18 -0000
@@ -18,26 +18,28 @@ function file_test_validator($file, $err
  * Helper function for testing file_scan_directory().
  *
  * Each time the function is called the file is stored in a static variable.
- * When the function is called with $reset parameter TRUE the cache is cleared
- * and the results returned.
+ * When the function is called with no $filepath parameter, the results are
+ * returned.
  *
  * @param $filepath
  *   File path
- * @param $reset
- *   Boolean indicating that the stored files should be removed and returned.
  * @return
- *   An array of all previous $file parameters since $reset was last called.
+ *   If $filepath is NULL, an array of all previous $filepath parameters
  */
-function file_test_file_scan_callback($filepath, $reset = FALSE) {
-  static $files = array();
-
-  if ($reset) {
-    $ret = $files;
-    $files = array();
-    return $ret;
+function file_test_file_scan_callback($filepath = NULL) {
+  $files = &drupal_static(__FUNCTION__, array());
+  if (isset($filepath)) {
+    $files[] = $filepath;
+  } else {
+    return $files;
   }
+}
 
-  $files[] = $filepath;
+/**
+ * Reset static variables used by file_test_file_scan_callback().
+ */
+function file_test_file_scan_callback_reset() {
+  drupal_static_reset('file_test_file_scan_callback');
 }
 
 /**
@@ -869,14 +871,16 @@ class FileScanDirectoryTest extends File
     // When nothing is matched nothing should be passed to the callback.
     $all_files = file_scan_directory($this->path, '/^NONEXISTINGFILENAME/', array('callback' => 'file_test_file_scan_callback'));
     $this->assertEqual(0, count($all_files), t('No files were found.'));
-    $results = file_test_file_scan_callback(NULL, TRUE);
+    $results = file_test_file_scan_callback();
+    file_test_file_scan_callback_reset();
     $this->assertEqual(0, count($results), t('No files were passed to the callback.'));
 
     // Grab a listing of all the JavaSscript files and check that they're
     // passed to the callback.
     $all_files = file_scan_directory($this->path, '/^javascript-/', array('callback' => 'file_test_file_scan_callback'));
     $this->assertEqual(2, count($all_files), t('Found two, expected javascript files.'));
-    $results = file_test_file_scan_callback(NULL, TRUE);
+    $results = file_test_file_scan_callback();
+    file_test_file_scan_callback_reset();
     $this->assertEqual(2, count($results), t('Files were passed to the callback.'));
   }