Index: includes/install.core.inc
===================================================================
RCS file: /cvs/drupal/drupal/includes/install.core.inc,v
retrieving revision 1.49
diff -u -p -r1.49 install.core.inc
--- includes/install.core.inc	3 Jan 2011 15:48:11 -0000	1.49
+++ includes/install.core.inc	26 Feb 2011 20:52:56 -0000
@@ -1002,7 +1002,19 @@ function install_select_profile(&$instal
   $install_state['profiles'] += install_find_profiles();
   if (empty($install_state['parameters']['profile'])) {
     // Try to find a profile.
-    $profile = _install_select_profile($install_state['profiles']);
+    $profiles = $install_state['profiles'];
+    foreach ($profiles as $key => $profile) {
+      $details = install_profile_info($profile->name);
+      // Remove hidden profiles (such as the testing profile, which only exists
+      // to speed up test runs) from the list. This prevents them from being
+      // displayed in the user interface, and also means that if there is only
+      // one non-hidden profile, _install_select_profile() will choose it
+      // automatically.
+      if (!empty($details['hidden'])) {
+        unset($profiles[$key]);
+      }
+    }
+    $profile = _install_select_profile($profiles);
     if (empty($profile)) {
       // We still don't have a profile, so display a form for selecting one.
       // Only do this in the case of interactive installations, since this is
@@ -1012,7 +1024,7 @@ function install_select_profile(&$instal
       if ($install_state['interactive']) {
         include_once DRUPAL_ROOT . '/includes/form.inc';
         drupal_set_title(st('Select an installation profile'));
-        $form = drupal_get_form('install_select_profile_form', $install_state['profiles']);
+        $form = drupal_get_form('install_select_profile_form', $profiles);
         return drupal_render($form);
       }
       else {
@@ -1068,6 +1080,8 @@ function install_select_profile_form($fo
     $details = install_profile_info($profile->name);
     // Don't show hidden profiles. This is used by to hide the testing profile,
     // which only exists to speed up test runs.
+    // @todo: This duplicates logic in install_select_profile() and is here
+    //   only for backwards compatibility. Remove it in Drupal 8.
     if ($details['hidden'] === TRUE) {
       continue;
     }