diff --git a/tests/console/cron/run_test.php b/tests/console/cron/run_test.php
index 029dc5249b..f76e967484 100644
--- a/tests/console/cron/run_test.php
+++ b/tests/console/cron/run_test.php
@@ -16,6 +16,7 @@ use Symfony\Component\Console\Tester\CommandTester;
 use phpbb\console\command\cron\run;
 
 require_once dirname(__FILE__) . '/tasks/simple.php';
+require_once dirname(__FILE__) . '/../../../phpBB/includes/functions.php';
 
 class phpbb_console_command_cron_run_test extends phpbb_database_test_case
 {
diff --git a/tests/controller/controller_test.php b/tests/controller/controller_test.php
index 58bcf0ef81..62feee3fed 100644
--- a/tests/controller/controller_test.php
+++ b/tests/controller/controller_test.php
@@ -11,6 +11,8 @@
 *
 */
 
+require_once dirname(__FILE__) . '/../../phpBB/includes/functions.php';
+
 use Symfony\Component\HttpFoundation\Request;
 use Symfony\Component\Config\FileLocator;
 use Symfony\Component\DependencyInjection\ContainerBuilder;
diff --git a/tests/functional/acp_groups_test.php b/tests/functional/acp_groups_test.php
index 4eb4747572..9dfdc93474 100644
--- a/tests/functional/acp_groups_test.php
+++ b/tests/functional/acp_groups_test.php
@@ -11,12 +11,12 @@
 *
 */
 
-require_once dirname(__FILE__) . '/common_groups_test.php';
+require_once dirname(__FILE__) . '/common_groups_test_case.php';
 
 /**
 * @group functional
 */
-class phpbb_functional_acp_groups_test extends phpbb_functional_common_groups_test
+class phpbb_functional_acp_groups_test extends phpbb_functional_common_groups_test_case
 {
 	protected $form_data;
 
diff --git a/tests/functional/avatar_acp_groups_test.php b/tests/functional/avatar_acp_groups_test.php
index 925335a2f7..ca8c84ab2e 100644
--- a/tests/functional/avatar_acp_groups_test.php
+++ b/tests/functional/avatar_acp_groups_test.php
@@ -11,12 +11,12 @@
 *
 */
 
-require_once dirname(__FILE__) . '/common_avatar_test.php';
+require_once dirname(__FILE__) . '/common_avatar_test_case.php';
 
 /**
  * @group functional
  */
-class phpbb_functional_avatar_acp_groups_test extends phpbb_functional_common_avatar_test
+class phpbb_functional_avatar_acp_groups_test extends phpbb_functional_common_avatar_test_case
 {
 	public function get_url()
 	{
diff --git a/tests/functional/avatar_acp_users_test.php b/tests/functional/avatar_acp_users_test.php
index 5eca473157..8b05a28658 100644
--- a/tests/functional/avatar_acp_users_test.php
+++ b/tests/functional/avatar_acp_users_test.php
@@ -11,12 +11,12 @@
 *
 */
 
-require_once dirname(__FILE__) . '/common_avatar_test.php';
+require_once dirname(__FILE__) . '/common_avatar_test_case.php';
 
 /**
  * @group functional
  */
-class phpbb_functional_avatar_acp_users_test extends phpbb_functional_common_avatar_test
+class phpbb_functional_avatar_acp_users_test extends phpbb_functional_common_avatar_test_case
 {
 	public function get_url()
 	{
diff --git a/tests/functional/avatar_ucp_groups_test.php b/tests/functional/avatar_ucp_groups_test.php
index 1e8ca911c6..52ef67543e 100644
--- a/tests/functional/avatar_ucp_groups_test.php
+++ b/tests/functional/avatar_ucp_groups_test.php
@@ -10,12 +10,12 @@
 * the docs/CREDITS.txt file.
 *
 */
-require_once dirname(__FILE__) . '/common_avatar_test.php';
+require_once dirname(__FILE__) . '/common_avatar_test_case.php';
 
 /**
  * @group functional
  */
-class phpbb_functional_avatar_ucp_groups_test extends phpbb_functional_common_avatar_test
+class phpbb_functional_avatar_ucp_groups_test extends phpbb_functional_common_avatar_test_case
 {
 	public function get_url()
 	{
diff --git a/tests/functional/avatar_ucp_users_test.php b/tests/functional/avatar_ucp_users_test.php
index 972bfa0fb2..2f0832e092 100644
--- a/tests/functional/avatar_ucp_users_test.php
+++ b/tests/functional/avatar_ucp_users_test.php
@@ -11,12 +11,12 @@
 *
 */
 
-require_once dirname(__FILE__) . '/common_avatar_test.php';
+require_once dirname(__FILE__) . '/common_avatar_test_case.php';
 
 /**
  * @group functional
  */
-class phpbb_functional_avatar_ucp_users_test extends phpbb_functional_common_avatar_test
+class phpbb_functional_avatar_ucp_users_test extends phpbb_functional_common_avatar_test_case
 {
 	public function get_url()
 	{
diff --git a/tests/functional/common_avatar_test.php b/tests/functional/common_avatar_test_case.php
similarity index 96%
rename from tests/functional/common_avatar_test.php
rename to tests/functional/common_avatar_test_case.php
index 82d7136c98..7278f23bcc 100644
--- a/tests/functional/common_avatar_test.php
+++ b/tests/functional/common_avatar_test_case.php
@@ -14,7 +14,7 @@
 /**
  * @group functional
  */
-abstract class phpbb_functional_common_avatar_test extends phpbb_functional_test_case
+abstract class phpbb_functional_common_avatar_test_case extends phpbb_functional_test_case
 {
 	private $path;
 	private $form_content;
diff --git a/tests/functional/common_groups_test.php b/tests/functional/common_groups_test_case.php
similarity index 97%
rename from tests/functional/common_groups_test.php
rename to tests/functional/common_groups_test_case.php
index 748d4d5e0a..521b7c84d2 100644
--- a/tests/functional/common_groups_test.php
+++ b/tests/functional/common_groups_test_case.php
@@ -14,7 +14,7 @@
 /**
 * @group functional
 */
-abstract class phpbb_functional_common_groups_test extends phpbb_functional_test_case
+abstract class phpbb_functional_common_groups_test_case extends phpbb_functional_test_case
 {
 	abstract protected function get_url();
 
diff --git a/tests/functional/ucp_groups_test.php b/tests/functional/ucp_groups_test.php
index 2b075b37a5..cd18a0fcae 100644
--- a/tests/functional/ucp_groups_test.php
+++ b/tests/functional/ucp_groups_test.php
@@ -11,12 +11,12 @@
 *
 */
 
-require_once dirname(__FILE__) . '/common_groups_test.php';
+require_once dirname(__FILE__) . '/common_groups_test_case.php';
 
 /**
 * @group functional
 */
-class phpbb_functional_ucp_groups_test extends phpbb_functional_common_groups_test
+class phpbb_functional_ucp_groups_test extends phpbb_functional_common_groups_test_case
 {
 	protected $db;
 
diff --git a/tests/functions/validate_username_test.php b/tests/functions/validate_username_test.php
index dc9f685f04..4fa5af7ff3 100644
--- a/tests/functions/validate_username_test.php
+++ b/tests/functions/validate_username_test.php
@@ -11,6 +11,7 @@
 *
 */
 
+require_once dirname(__FILE__) . '/../../phpBB/includes/functions.php';
 require_once dirname(__FILE__) . '/../../phpBB/includes/functions_user.php';
 require_once dirname(__FILE__) . '/../../phpBB/includes/utf/utf_tools.php';
 require_once dirname(__FILE__) . '/../mock/cache.php';
diff --git a/tests/functions/insert_config_array_test.php b/tests/functions_acp/insert_config_array_test.php
similarity index 97%
rename from tests/functions/insert_config_array_test.php
rename to tests/functions_acp/insert_config_array_test.php
index bfcb05862e..1264b35bf4 100644
--- a/tests/functions/insert_config_array_test.php
+++ b/tests/functions_acp/insert_config_array_test.php
@@ -11,6 +11,8 @@
 *
 */
 
+require_once dirname(__FILE__) . '/../../phpBB/includes/functions_acp.php';
+
 class phpbb_functions_insert_config_array_test extends phpbb_test_case
 {
 	public function config_display_vars()
diff --git a/tests/notification/group_request_test.php b/tests/notification/group_request_test.php
index afbc586601..0d1bda95ce 100644
--- a/tests/notification/group_request_test.php
+++ b/tests/notification/group_request_test.php
@@ -12,6 +12,7 @@
 */
 
 require_once dirname(__FILE__) . '/base.php';
+require_once dirname(__FILE__) . '/../../phpBB/includes/functions.php';
 
 class phpbb_notification_group_request_test extends phpbb_tests_notification_base
 {
diff --git a/tests/test_framework/phpbb_session_test_case.php b/tests/test_framework/phpbb_session_test_case.php
index efad4d5166..1bf0277fe0 100644
--- a/tests/test_framework/phpbb_session_test_case.php
+++ b/tests/test_framework/phpbb_session_test_case.php
@@ -11,6 +11,7 @@
 *
 */
 
+require_once dirname(__FILE__) . '/../../phpBB/includes/functions.php';
 require_once dirname(__FILE__) . '/../session/testable_factory.php';
 require_once dirname(__FILE__) . '/../session/testable_facade.php';
 
diff --git a/tests/tree/nestedset_forum_base.php b/tests/tree/nestedset_forum_base.php
index 449b2e5ca8..c56be1f81e 100644
--- a/tests/tree/nestedset_forum_base.php
+++ b/tests/tree/nestedset_forum_base.php
@@ -11,6 +11,8 @@
 *
 */
 
+require_once dirname(__FILE__) . '/../../phpBB/includes/functions.php';
+
 class phpbb_tests_tree_nestedset_forum_base extends phpbb_database_test_case
 {
 	public function getDataSet()