diff --git a/tests/test_framework/phpbb_functional_test_case.php b/tests/test_framework/phpbb_functional_test_case.php
index 59979e035d..e346223a4b 100644
--- a/tests/test_framework/phpbb_functional_test_case.php
+++ b/tests/test_framework/phpbb_functional_test_case.php
@@ -262,7 +262,7 @@ class phpbb_functional_test_case extends phpbb_test_case
 		$config['rand_seed_last_update'] = time() + 600;
 
 		// Required by user_add
-		global $db, $cache, $phpbb_dispatcher;
+		global $db, $cache, $phpbb_dispatcher, $phpbb_container;
 		$db = $this->get_db();
 		if (!function_exists('phpbb_mock_null_cache'))
 		{
@@ -270,6 +270,14 @@ class phpbb_functional_test_case extends phpbb_test_case
 		}
 		$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');