diff --git a/modules/simpletest/drupal_web_test_case.php b/modules/simpletest/drupal_web_test_case.php
index 5a7158c..cc6c732 100644
--- a/modules/simpletest/drupal_web_test_case.php
+++ b/modules/simpletest/drupal_web_test_case.php
@@ -1484,7 +1484,6 @@ class DrupalWebTestCase extends DrupalTestCase {
     $cache_key = $this->getCacheKey($cache_key_suffix);
 
     try {
-      $this->alterToMyISAM();
       $this->copyCache(substr($this->databasePrefix, 10), $cache_key);
     }
     catch (Exception $e) {
@@ -1557,32 +1556,6 @@ class DrupalWebTestCase extends DrupalTestCase {
   }
 
   /**
-   * Alter certain tables to MyISAM engine to speed up tests.
-   *
-   * MyISAM is faster to delete and copy tables. It gives a small advantage
-   * when /var/lib/docroot/mysql is on SHM (memory) device, but much bigger when tests
-   * are run on a block device.
-   */
-  protected function alterToMyISAM() {
-    $skip_alter = array(
-      'taxonomy_term_data',
-      'node',
-      'node_access',
-      'node_revision',
-      'node_comment_statistics',
-    );
-    $tables = db_find_tables($this->databasePrefix . '%');
-    foreach ($tables as $table) {
-      $original_table_name = substr($table, strlen($this->databasePrefix));
-      if(!in_array($original_table_name, $skip_alter)){
-        db_query('ALTER TABLE ' . $table . ' ENGINE=MyISAM');
-      }
-    }
-  }
-
-
-
-  /**
    * Sets up a Drupal site for running functional and integration tests.
    *
    * Generates a random database prefix and installs Drupal with the specified