diff --git a/application/models/User.php b/application/models/User.php
index d32314c817a..07169f77fe6 100644
--- a/application/models/User.php
+++ b/application/models/User.php
@@ -436,8 +436,12 @@ public function getSuperAdmins()
     {
         // TODO should be static
         $criteria = new CDbCriteria();
-        $criteria->join = ' JOIN {{permissions}} AS p ON p.uid = t.uid';
-        $criteria->addCondition('p.permission = \'superadmin\'');
+        /* have read superadmin permissions */
+        $criteria->with = array('permissions');
+        $criteria->compare('permissions.permission', 'superadmin');
+        $criteria->compare('permissions.read_p', '1');
+        /* OR are inside forcedsuperadmin config */
+        $criteria->addInCondition('t.uid', App()->getConfig('forcedsuperadmin'), 'OR');
         /** @var User[] $users */
         $users = $this->findAll($criteria);
         return $users;
diff --git a/tests/unit/models/UserTest.php b/tests/unit/models/UserTest.php
index 8ea46c13853..69e2e67fb0a 100644
--- a/tests/unit/models/UserTest.php
+++ b/tests/unit/models/UserTest.php
@@ -2,8 +2,95 @@
 
 namespace ls\tests;
 
-
 class UserTest extends BaseModelTestCase
 {
     protected $modelClassName = \User::class;
+
+    /**
+    * Test for users with superadmin permissions.
+    */
+    public function testGetUsersWithSuperAdminPermissions()
+    {
+        //Create user.
+        $newPassword = createPassword();
+        $userId = \User::insertUser('test_user', $newPassword, 'John Doe', 1, 'jd@mail.com');
+
+        //Assign superadmin permissions.
+        \Permission::model()->setGlobalPermission($userId, 'superadmin', array('read_p'));
+
+        $superAdminsBefore = \User::model()->getSuperAdmins();
+
+        //Deselect the super administrator permissions for the user.
+        $permission = \Permission::model()->findByAttributes(array('uid' => $userId));
+        $permission->read_p = 0;
+        $permission->save();
+
+        $superAdminsAfter = \User::model()->getSuperAdmins();
+
+        $this->assertNotSameSize($superAdminsBefore, $superAdminsAfter, 'The new user should not have superadmin permissions anymore.');
+
+        //Delete user.
+        $user = \User::model()->findByPk($userId);
+        $user->delete();
+        $permission->delete();
+    }
+
+    /**
+     * Test get users that will always be super admins, no matter their permissions.
+     * See config-defaluts.php.
+     */
+    public function testGetUsersWithForcedSuperAdminPermissionsByDefault()
+    {
+        $superAdminsBefore = \User::model()->getSuperAdmins();
+
+        //Get forced super admin array. By default user id 1 is a forcedsuperadmin.
+        $forcedSuperAdmins = App()->getConfig('forcedsuperadmin');
+
+        //Deselect the super administrator permissions for the forcedsuperadmin user.
+        $permission = \Permission::model()->findByAttributes(array('uid' => $forcedSuperAdmins[0]));
+        $temp_read_p = $permission->read_p;
+        $permission->read_p = 0;
+        $permission->save();
+
+        $isForced = \Permission::isForcedSuperAdmin($forcedSuperAdmins[0]);
+        $superAdminsAfter = \User::model()->getSuperAdmins();
+
+        $this->assertTrue($isForced, 'The forced super admin user should still be a super admin.');
+        $this->assertSameSize($superAdminsBefore, $superAdminsAfter, 'The forced super admin user should still be a super admin.');
+
+        //Restore forcedsuperadmin read_p status.
+        $permission->read_p = $temp_read_p;
+        $permission->save();
+    }
+
+    /**
+     * Make a new user forcedsuperadmin.
+     */
+    public function testGetUsersWithForcedSuperAdminPermissionsOnNewUser()
+    {
+        $superAdminsBefore = \User::model()->getSuperAdmins();
+
+        //Create user.
+        $newPassword = createPassword();
+        $userId = \User::insertUser('test_user', $newPassword, 'John Doe', 1, 'jd@mail.com');
+
+        //Add new user id to forcedsuperadmin array.
+        $tempForcedSuperAdmins = App()->getConfig('forcedsuperadmin');
+        $newForcedSuperAdmins = array_merge($tempForcedSuperAdmins, array( (int)$userId ));
+        App()->setConfig('forcedsuperadmin', $newForcedSuperAdmins);
+        $forcedSuperAdmins = App()->getConfig('forcedsuperadmin');
+
+        $superAdminsAfter = \User::model()->getSuperAdmins();
+        $isForced = \Permission::isForcedSuperAdmin($userId);
+
+        $this->assertTrue($isForced, 'The forced super admin user should still be a super admin.');
+        $this->assertNotSameSize($superAdminsBefore, $superAdminsAfter, 'The new user have superadmin permissions.');
+
+        //Delete user.
+        $user = \User::model()->findByPk($userId);
+        $user->delete();
+
+        //Restore forcedsuperadmin original array.
+        App()->setConfig('forcedsuperadmin', $tempForcedSuperAdmins);
+    }
 }