diff --git a/phpBB/memberlist.php b/phpBB/memberlist.php
index d25583b84a..e6045b151a 100644
--- a/phpBB/memberlist.php
+++ b/phpBB/memberlist.php
@@ -146,7 +146,7 @@ switch ($mode)
 
 		$result = $db->sql_query($db->sql_build_query('SELECT', $sql_ary));
 
-		$user_ary = array();
+		$user_ary = $user_ids = $group_users = array();
 		while ($row = $db->sql_fetchrow($result))
 		{
 			$row['forums'] = '';
@@ -157,11 +157,13 @@ switch ($mode)
 		}
 		$db->sql_freeresult($result);
 
-		if ($config['teampage_forums'])
+		$user_ids = array_unique($user_ids);
+
+		if (!empty($user_ids) && $config['teampage_forums'])
 		{
 			$template->assign_var('S_DISPLAY_MODERATOR_FORUMS', true);
 			// Get all moderators
-			$perm_ary = $auth->acl_get_list(array_unique($user_ids), array('m_'), false);
+			$perm_ary = $auth->acl_get_list($user_ids, array('m_'), false);
 
 			foreach ($perm_ary as $forum_id => $forum_ary)
 			{
diff --git a/tests/functional/memberlist_test.php b/tests/functional/memberlist_test.php
index 879bee2f0e..66e3591f21 100644
--- a/tests/functional/memberlist_test.php
+++ b/tests/functional/memberlist_test.php
@@ -40,4 +40,39 @@ class phpbb_functional_memberlist_test extends phpbb_functional_test_case
 		$this->assert_response_success();
 		$this->assertContains('admin', $crawler->filter('h2')->text());
 	}
+
+	public function test_leaders()
+	{
+		$this->login();
+		$this->create_user('memberlist-test-moderator');
+
+		// Admin should be listed, user not
+		$crawler = $this->request('GET', 'memberlist.php?mode=leaders&sid=' . $this->sid);
+		$this->assert_response_success();
+		$this->assertContains('admin', $crawler->text());
+		$this->assertNotContains('memberlist-test-user', $crawler->text());
+		$this->assertNotContains('memberlist-test-moderator', $crawler->text());
+	}
+
+	public function test_leaders_remove_users()
+	{
+		$this->login();
+
+		// Remove admin from admins
+		$this->remove_user_group('ADMINISTRATORS', array('admin'));
+		$crawler = $this->request('GET', 'memberlist.php?mode=leaders&sid=' . $this->sid);
+		$this->assert_response_success();
+		$this->assertContains('admin', $crawler->text());
+	}
+
+	public function test_leaders_add_users()
+	{
+		$this->login();
+
+		// Add mod to moderators
+		$this->add_user_group('GLOBAL_MODERATORS', array('memberlist-test-moderator'));
+		$crawler = $this->request('GET', 'memberlist.php?mode=leaders&sid=' . $this->sid);
+		$this->assert_response_success();
+		$this->assertContains('memberlist-test-moderator', $crawler->text());
+	}
 }
diff --git a/tests/test_framework/phpbb_functional_test_case.php b/tests/test_framework/phpbb_functional_test_case.php
index a411d9c98a..db6a6066e4 100644
--- a/tests/test_framework/phpbb_functional_test_case.php
+++ b/tests/test_framework/phpbb_functional_test_case.php
@@ -316,6 +316,90 @@ class phpbb_functional_test_case extends phpbb_test_case
 		return user_add($user_row);
 	}
 
+	protected function remove_user_group($group_name, $usernames)
+	{
+		global $db, $cache, $auth, $config, $phpbb_dispatcher, $phpbb_log, $phpbb_container, $phpbb_root_path, $phpEx;
+
+		$config = new phpbb_config(array());
+		$config['coppa_enable'] = 0;
+
+		$db = $this->get_db();
+		$phpbb_dispatcher = new phpbb_mock_event_dispatcher();
+		$user = $this->getMock('phpbb_user');
+		$auth = $this->getMock('phpbb_auth');
+
+		$phpbb_log = new phpbb_log($db, $user, $auth, $phpbb_dispatcher, $phpbb_root_path, 'adm/', $phpEx, LOG_TABLE);
+		$cache = new phpbb_mock_null_cache;
+
+		$cache_driver = new phpbb_cache_driver_null();
+		$phpbb_container = $this->getMock('Symfony\Component\DependencyInjection\ContainerInterface');
+		$phpbb_container
+			->expects($this->any())
+			->method('get')
+			->with('cache.driver')
+			->will($this->returnValue($cache_driver));
+
+		if (!function_exists('utf_clean_string'))
+		{
+			require_once(__DIR__ . '/../../phpBB/includes/utf/utf_tools.php');
+		}
+		if (!function_exists('group_user_del'))
+		{
+			require_once(__DIR__ . '/../../phpBB/includes/functions_user.php');
+		}
+
+		$sql = 'SELECT group_id
+			FROM ' . GROUPS_TABLE . "
+			WHERE group_name = '" . $db->sql_escape($group_name) . "'";
+		$result = $db->sql_query($sql);
+		$group_id = (int) $db->sql_fetchfield('group_id');
+		$db->sql_freeresult($result);
+
+		return group_user_del($group_id, false, $usernames, $group_name);
+	}
+
+	protected function add_user_group($group_name, $usernames)
+	{
+		global $db, $cache, $auth, $config, $phpbb_dispatcher, $phpbb_log, $phpbb_container, $phpbb_root_path, $phpEx;
+
+		$config = new phpbb_config(array());
+		$config['coppa_enable'] = 0;
+
+		$db = $this->get_db();
+		$phpbb_dispatcher = new phpbb_mock_event_dispatcher();
+		$user = $this->getMock('phpbb_user');
+		$auth = $this->getMock('phpbb_auth');
+
+		$phpbb_log = new phpbb_log($db, $user, $auth, $phpbb_dispatcher, $phpbb_root_path, 'adm/', $phpEx, LOG_TABLE);
+		$cache = new phpbb_mock_null_cache;
+
+		$cache_driver = new phpbb_cache_driver_null();
+		$phpbb_container = $this->getMock('Symfony\Component\DependencyInjection\ContainerInterface');
+		$phpbb_container
+			->expects($this->any())
+			->method('get')
+			->with('cache.driver')
+			->will($this->returnValue($cache_driver));
+
+		if (!function_exists('utf_clean_string'))
+		{
+			require_once(__DIR__ . '/../../phpBB/includes/utf/utf_tools.php');
+		}
+		if (!function_exists('group_user_del'))
+		{
+			require_once(__DIR__ . '/../../phpBB/includes/functions_user.php');
+		}
+
+		$sql = 'SELECT group_id
+			FROM ' . GROUPS_TABLE . "
+			WHERE group_name = '" . $db->sql_escape($group_name) . "'";
+		$result = $db->sql_query($sql);
+		$group_id = (int) $db->sql_fetchfield('group_id');
+		$db->sql_freeresult($result);
+
+		return group_user_add($group_id, false, $usernames, $group_name);
+	}
+
 	protected function login($username = 'admin')
 	{
 		$this->add_lang('ucp');