diff --git a/profiles/standard/standard.install b/profiles/standard/standard.install
index ae34eaf..c4331e1 100644
--- a/profiles/standard/standard.install
+++ b/profiles/standard/standard.install
@@ -410,6 +410,14 @@ function standard_install() {
     ->fields(array('uid' => 1, 'rid' => $admin_role->rid))
     ->execute();
 
+  // Enable the page cache. For backwards compatibility and to avoid breaking
+  // any assumptions of existing automated tests (many of which use the
+  // Standard install profile), this is not enabled if the profile is being
+  // installed as part of an automated test.
+  if (empty($GLOBALS['drupal_test_info'])) {
+    variable_set('cache', 1);
+  }
+
   // Create a Home link in the main menu.
   $item = array(
     'link_title' => st('Home'),