diff -u b/core/includes/module.inc b/core/includes/module.inc
--- b/core/includes/module.inc
+++ b/core/includes/module.inc
@@ -142,7 +142,6 @@
       foreach ($enabled_modules as $module => $weight) {
         $filename = $module_data[$module]->filename;
         _system_list_warm('module', $module, $filename, TRUE);
-        drupal_classloader_register($module, dirname($filename));
         foreach (bootstrap_hooks() as $hook) {
           if (function_exists($module .'_' . $hook)) {
             $bootstrap_list[$module] = $filename;
diff -u b/core/modules/system/lib/Drupal/system/Tests/Module/ModuleApiTest.php b/core/modules/system/lib/Drupal/system/Tests/Module/ModuleApiTest.php
--- b/core/modules/system/lib/Drupal/system/Tests/Module/ModuleApiTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Module/ModuleApiTest.php
@@ -27,7 +27,7 @@
   /**
    * The basic functionality of module_list().
    */
-  function xtestModuleList() {
+  function testModuleList() {
     // Build a list of modules, sorted alphabetically.
     $profile_info = install_profile_info('standard', 'en');
     $module_list = $profile_info['dependencies'];
@@ -85,7 +85,7 @@
   /**
    * Test module_implements() caching.
    */
-  function xtestModuleImplements() {
+  function testModuleImplements() {
     // Clear the cache.
     cache('bootstrap')->delete('module_implements');
     $this->assertFalse(cache('bootstrap')->get('module_implements'), t('The module implements cache is empty.'));
@@ -114,7 +114,7 @@
   /**
    * Test that module_invoke() can load a hook defined in hook_hook_info().
    */
-  function xtestModuleInvoke() {
+  function testModuleInvoke() {
     module_enable(array('module_test'), FALSE);
     $this->resetAll();
     $this->drupalGet('module-test/hook-dynamic-loading-invoke');
@@ -124,7 +124,7 @@
   /**
    * Test that module_invoke_all() can load a hook defined in hook_hook_info().
    */
-  function xtestModuleInvokeAll() {
+  function testModuleInvokeAll() {
     module_enable(array('module_test'), FALSE);
     $this->resetAll();
     $this->drupalGet('module-test/hook-dynamic-loading-invoke-all');
@@ -137,7 +137,7 @@
    * We test this separately from testModuleInvokeAll(), because menu item load
    * functions execute early in the request handling.
    */
-  function xtestModuleInvokeAllDuringLoadFunction() {
+  function testModuleInvokeAllDuringLoadFunction() {
     module_enable(array('module_test'), FALSE);
     $this->resetAll();
     $this->drupalGet('module-test/hook-dynamic-loading-invoke-all-during-load/module_test');
@@ -164,7 +164,6 @@
     $result = module_enable(array('forum'));
     $this->assertFalse($result, t('module_enable() returns FALSE if dependencies are missing.'));
     $this->assertFalse(module_exists('forum'), t('module_enable() aborts if dependencies are missing.'));
-    return;
 
     // Now, fix the missing dependency. Forum module depends on poll, but poll
     // depends on the PHP module. module_enable() should work.
@@ -252,7 +251,7 @@
   /**
    * Tests whether the correct module metadata is returned.
    */
-  function xtestModuleMetaData() {
+  function testModuleMetaData() {
     // Generate the list of available modules.
     $modules = system_rebuild_module_data();
     // Check that the mtime field exists for the system module.
@@ -266,7 +265,7 @@
   /**
    * Tests whether the correct theme metadata is returned.
    */
-  function xtestThemeMetaData() {
+  function testThemeMetaData() {
     // Generate the list of available themes.
     $themes = system_rebuild_theme_data();
     // Check that the mtime field exists for the bartik theme.
diff -u b/core/modules/system/system.admin.inc b/core/modules/system/system.admin.inc
--- b/core/modules/system/system.admin.inc
+++ b/core/modules/system/system.admin.inc
@@ -792,8 +792,9 @@
 
   // Remove hidden modules from display list.
   $visible_files = $files;
+  $profile = drupal_get_profile();
   foreach ($visible_files as $filename => $file) {
-    if (!empty($file->info['hidden'])) {
+    if (!empty($file->info['hidden']) || $filename == $profile) {
       unset($visible_files[$filename]);
     }
   }
diff -u b/core/modules/system/system.module b/core/modules/system/system.module
--- b/core/modules/system/system.module
+++ b/core/modules/system/system.module
@@ -2795,20 +2795,18 @@
       $record->weight = 0;
       $record->status = 0;
       $record->schema_version = SCHEMA_UNINSTALLED;
-      // Copy parsed info.
-      $record->info = $record->parsed_info;
     }
     // Enabled status and weights.
     foreach (config('system.module')->get() as $module => $weight) {
       $modules[$module]->status = 1;
       $modules[$module]->weight = $weight;
     }
-    $modules = _module_build_dependencies($modules);
     // As noted above, system_list_reset() deletes $modules_cache so the order
     // here is important.
     system_list_reset();
     $modules_cache['data'] = $modules;
   }
+  // Running the info alter function is not possible before full bootstrap.
   if (!isset($modules_cache['info_alter']) && drupal_get_bootstrap_phase() >= DRUPAL_BOOTSTRAP_CODE) {
     // Invoke hook_system_info_alter() to give installed modules a chance to
     // modify the data in the .info files if necessary. It is not possible to
@@ -2817,6 +2815,10 @@
     $type = 'module';
     // It is not impossible a function resets the modules cache. Keep it.
     $modules = $modules_cache['data'];
+    foreach ($modules as $record) {
+       // Copy parsed info.
+      $record->info = $record->parsed_info;
+    }
     foreach (config('system.module')->get() as $module => $weight) {
       $function = $module .'_system_info_alter';
       if (function_exists($function)) {