diff --git a/lib/Doctrine/Repositories/UserRepository.php b/lib/Doctrine/Repositories/UserRepository.php
index 746b50a62e..623ae541b6 100644
--- a/lib/Doctrine/Repositories/UserRepository.php
+++ b/lib/Doctrine/Repositories/UserRepository.php
@@ -12,6 +12,7 @@
 namespace Repositories;
 
 use Doctrine\ORM\EntityRepository;
+use Entities\User;
 
 /**
  * User
@@ -21,4 +22,89 @@ use Doctrine\ORM\EntityRepository;
  */
 class UserRepository extends EntityRepository
 {
+    /**
+     * Finds admins
+     *
+     * @return array
+     */
+    public function findAdmins()
+    {
+        $qb = $this->createQueryBuilder('u');
+
+        $qb->where($qb->expr()->eq('u.admin', $qb->expr()->literal(true)))
+            ->andWhere($qb->expr()->isNull('u.modelOf'))
+            ->andWhere($qb->expr()->eq('u.deleted', $qb->expr()->literal(false)));
+
+        return $qb->getQuery()->getResult();
+    }
+
+    /**
+     * Sets a selection of user
+     *
+     * @param array $users An array of user
+     *
+     * @return integer The number of processed rows
+     */
+    public function setAdmins(array $users)
+    {
+        $qb = $this->createQueryBuilder('u');
+
+        $qb->update('Entities\User', 'u')
+            ->set('u.admin', $qb->expr()->literal(true))
+            ->where($qb->expr()->in('u.id', array_map(function($value) {
+                if ($value instanceof User) {
+                    return $value->getId();
+                }
+
+                return (int) $value;
+            }, $users)));
+
+        return $qb->getQuery()->execute();
+    }
+
+    /**
+     * Resets all admins
+     *
+     * @return integer The number of processed rows
+     */
+    public function resetAdmins()
+    {
+        $qb = $this->createQueryBuilder('u');
+
+        $qb->update('Entities\User', 'u')
+            ->set('u.admin', $qb->expr()->literal(false))
+            ->where($qb->expr()->eq('u.admin', $qb->expr()->literal(true)));
+
+        return $qb->getQuery()->execute();
+    }
+
+    /**
+     * Finds a user by login
+     *
+     * @param string $login
+     *
+     * @return null|User
+     */
+    public function findByLogin($login)
+    {
+        return $this->findOneBy(array('login' => $login));
+    }
+
+    /**
+     * Finds a user by email
+     *
+     * @param string $email
+     *
+     * @return null|User
+     */
+    public function findByEmail($email)
+    {
+        $qb = $this->createQueryBuilder('u');
+
+        $qb->where($qb->expr()->eq('u.email', $email))
+            ->andWhere($qb->expr()->isNotNull('u.email'))
+            ->andWhere($qb->expr()->eq('u.deleted', $qb->expr()->literal(false)));
+
+        return $qb->getQuery()->getOneOrNullResult();
+    }
 }
diff --git a/tests/Doctrine/Tests/Repositories/UserRepositoryTest.php b/tests/Doctrine/Tests/Repositories/UserRepositoryTest.php
new file mode 100644
index 0000000000..f7a2f68a01
--- /dev/null
+++ b/tests/Doctrine/Tests/Repositories/UserRepositoryTest.php
@@ -0,0 +1,104 @@
+<?php
+
+/*
+ * This file is part of Phraseanet
+ *
+ * (c) 2005-2013 Alchemy
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Doctrine\Tests\Repositories;
+
+use Entities\User;
+
+class UserRepositoryTest extends \PhraseanetPHPUnitAbstract
+{
+    public function testFindAdmins()
+    {
+        $this->markTestSkipped('missing deleted field');
+        $user = new User();
+        $user->setLogin('login');
+        $user->setPassword('toto');
+        $this->insertOneUser($user);
+        $users = self::$DI['app']['EM']->getRepository('Entities\User')->findAdmins();
+        $this->assertEquals(0, count($users));
+
+        $user->setAdmin(true);
+        $this->insertOneUser($user);
+        $users = self::$DI['app']['EM']->getRepository('Entities\User')->findAdmins();
+        $this->assertEquals(1, count($users));
+
+        $user->setModelOf(1);
+        $this->insertOneUser($user);
+        $users = self::$DI['app']['EM']->getRepository('Entities\User')->findAdmins();
+        $this->assertEquals(0, count($users));
+
+        $user->setModelOf(null);
+        $user->setModelOf(true);
+        $this->insertOneUser($user);
+        $users = self::$DI['app']['EM']->getRepository('Entities\User')->findAdmins();
+        $this->assertEquals(0, count($users));
+    }
+
+    public function testSetAdmins()
+    {
+        $user = new User();
+        $user->setLogin('login');
+        $user->setPassword('toto');
+        $this->insertOneUser($user);
+        $this->assertFalse($user->isAdmin());
+        self::$DI['app']['EM']->getRepository('Entities\User')->setAdmins(array($user));
+        $user = self::$DI['app']['EM']->getReference('Entities\User', $user->getId());
+        self::$DI['app']['EM']->refresh($user);
+        $this->assertTrue($user->isAdmin());
+    }
+
+    public function testResetAdmins()
+    {
+        $user = new User();
+        $user->setLogin('login');
+        $user->setPassword('toto');
+        $user->setAdmin(true);
+        $this->insertOneUser($user);
+        $this->assertTrue($user->isAdmin());
+        self::$DI['app']['EM']->getRepository('Entities\User')->resetAdmins();
+        $user = self::$DI['app']['EM']->getReference('Entities\User', $user->getId());
+        self::$DI['app']['EM']->refresh($user);
+        $this->assertFalse($user->isAdmin());
+    }
+
+    public function testFindByLogin()
+    {
+        $user = new User();
+        $user->setLogin('login');
+        $user->setPassword('toto');
+        $this->insertOneUser($user);
+        $user = self::$DI['app']['EM']->getRepository('Entities\User')->findByLogin('login');
+        $this->assertInstanceOf('Entities\User', $user);
+        $this->assertNull(self::$DI['app']['EM']->getRepository('Entities\User')->findByLogin('wrong-login'));
+    }
+
+    public function testFindByEmail()
+    {
+        $this->markTestSkipped('missing deleted field');
+        $user = new User();
+        $user->setLogin('login');
+        $user->setPassword('toto');
+        $user->setEmail('toto@toto.to');
+        $this->insertOneUser($user);
+        $userFound = self::$DI['app']['EM']->getRepository('Entities\User')->findByEmail('toto@toto.to');
+        $this->assertInstanceOf('Entities\User', $userFound);
+
+        $user->setDeleted(true);
+        $this->insertOneUser($user);
+        $userFound = self::$DI['app']['EM']->getRepository('Entities\User')->findByEmail('toto@toto.to');
+        $this->assertNull($userFound);
+
+        $user->setEmail(null);
+        $this->insertOneUser($user);
+        $userFound = self::$DI['app']['EM']->getRepository('Entities\User')->findByEmail(null);
+        $this->assertNull($userFound);
+    }
+}
\ No newline at end of file
diff --git a/tests/classes/PhraseanetPHPUnitAbstract.php b/tests/classes/PhraseanetPHPUnitAbstract.php
index e120e09f7c..b691b7ec34 100644
--- a/tests/classes/PhraseanetPHPUnitAbstract.php
+++ b/tests/classes/PhraseanetPHPUnitAbstract.php
@@ -4,6 +4,7 @@ use Alchemy\Phrasea\CLI;
 use Alchemy\Phrasea\Application;
 use Alchemy\Phrasea\Border\File;
 use Doctrine\Common\DataFixtures\Loader;
+use Entities\User;
 use Silex\WebTestCase;
 use Symfony\Component\HttpFoundation\Response;
 use Symfony\Component\HttpKernel\Client;
@@ -568,6 +569,22 @@ abstract class PhraseanetPHPUnitAbstract extends WebTestCase
         return;
     }
 
+    protected function insertOneUser(User $user)
+    {
+         try {
+            $userFixture = new PhraseaFixture\User\LoadOneUser();
+            $userFixture->setUser($user);
+
+            $loader = new Loader();
+            $loader->addFixture($userFixture);
+
+            $this->insertFixtureInDatabase($loader);
+
+        } catch (\Exception $e) {
+            $this->fail('Fail load one Basket : ' . $e->getMessage());
+        }
+    }
+
     /**
      * Calls a URI as XMLHTTP request.
      *