From 70c07d4302935756c8523cd211f2b6043a4b8932 Mon Sep 17 00:00:00 2001
From: rxu <rxu@mail.ru>
Date: Tue, 23 Sep 2025 14:54:27 +0700
Subject: [PATCH 1/3] [ticket/17543] Optimize functional tests running time

PHPBB-17543
---
 .../functional/extension_controller_test.php  |  9 +++++---
 tests/functional/extension_module_test.php    |  7 ++++--
 .../extension_template_event_order_test.php   | 11 +++++----
 tests/functional/mcp/mcp_main_test.php        |  2 +-
 tests/functional/metadata_manager_test.php    |  7 ++++--
 tests/functional/prune_shadow_topic_test.php  |  2 +-
 tests/functional/search/base.php              |  2 --
 tests/functional/search/mysql_test.php        | 11 +++++++++
 tests/functional/search/postgres_test.php     | 10 ++++++++
 tests/functional/search/sphinx_test.php       | 23 +++++++++----------
 .../phpbb_functional_test_case.php            | 14 +++++++++--
 11 files changed, 69 insertions(+), 29 deletions(-)

diff --git a/tests/functional/extension_controller_test.php b/tests/functional/extension_controller_test.php
index 4cc5e2d2a9..451565c186 100644
--- a/tests/functional/extension_controller_test.php
+++ b/tests/functional/extension_controller_test.php
@@ -39,7 +39,7 @@ class phpbb_functional_extension_controller_test extends phpbb_functional_test_c
 
 	protected static function setup_extensions()
 	{
-		return ['foo/bar', 'foo/foo'];
+		return self::$tests_count == self::$tests_number ? ['foo/bar', 'foo/foo'] : [];
 	}
 
 	protected function setUp(): void
@@ -51,8 +51,11 @@ class phpbb_functional_extension_controller_test extends phpbb_functional_test_c
 
 	protected function tearDown(): void
 	{
-		$this->uninstall_ext('foo/bar');
-		$this->uninstall_ext('foo/foo');
+		if (self::$tests_count == 1)
+		{
+			$this->uninstall_ext('foo/bar');
+			$this->uninstall_ext('foo/foo');
+		}
 
 		parent::tearDown();
 	}
diff --git a/tests/functional/extension_module_test.php b/tests/functional/extension_module_test.php
index 08ec7e5012..cc7f5b1605 100644
--- a/tests/functional/extension_module_test.php
+++ b/tests/functional/extension_module_test.php
@@ -40,14 +40,17 @@ class phpbb_functional_extension_module_test extends phpbb_functional_test_case
 
 	protected function tearDown(): void
 	{
-		$this->uninstall_ext('foo/bar');
+		if (self::$tests_count == 1)
+		{
+			$this->uninstall_ext('foo/bar');
+		}
 
 		parent::tearDown();
 	}
 
 	protected static function setup_extensions()
 	{
-		return ['foo/bar'];
+		return self::$tests_count == self::$tests_number ? ['foo/bar'] : [];
 	}
 
 	public function test_acp()
diff --git a/tests/functional/extension_template_event_order_test.php b/tests/functional/extension_template_event_order_test.php
index 197efce746..596f46ca3e 100644
--- a/tests/functional/extension_template_event_order_test.php
+++ b/tests/functional/extension_template_event_order_test.php
@@ -46,15 +46,18 @@ class phpbb_functional_extension_template_event_order_test extends phpbb_functio
 
 	protected function tearDown(): void
 	{
-		$this->uninstall_ext('foo/bar');
-		$this->uninstall_ext('foo/foo');
+		if (self::$tests_count == 1)
+		{
+			$this->uninstall_ext('foo/bar');
+			$this->uninstall_ext('foo/foo');
+		}
 
 		parent::tearDown();
 	}
 
 	protected static function setup_extensions()
 	{
-		return ['foo/bar', 'foo/foo'];
+		return self::$tests_count == self::$tests_number ? ['foo/bar', 'foo/foo'] : [];
 	}
 
 	/**
@@ -84,7 +87,7 @@ class phpbb_functional_extension_template_event_order_test extends phpbb_functio
 		$crawler = self::request('GET', 'index.php');
 		$quick_links_menu = $crawler->filter('ul[role="menu"]')->eq(0);
 		$quick_links_menu_nodes_count = (int) $quick_links_menu->filter('li')->count();
-		// Ensure foo/foo template event goes before foo/bar one
+		// Ensure foo/bar template event goes before foo/foo one
 		$this->assertStringContainsString('FOO_BAR_QUICK_LINK', $quick_links_menu->filter('li')->eq($quick_links_menu_nodes_count - 4)->filter('span')->text());
 		$this->assertStringContainsString('FOO_FOO_QUICK_LINK', $quick_links_menu->filter('li')->eq($quick_links_menu_nodes_count - 3)->filter('span')->text());
 	}
diff --git a/tests/functional/mcp/mcp_main_test.php b/tests/functional/mcp/mcp_main_test.php
index 7f092e1f00..4d5bfc1e0a 100644
--- a/tests/functional/mcp/mcp_main_test.php
+++ b/tests/functional/mcp/mcp_main_test.php
@@ -208,7 +208,7 @@ class phpbb_functional_mcp_main_test extends phpbb_functional_test_case
 		// Create replies. Flood control was disabled above
 		for ($i = 1; $i <= 15; $i++)
 		{
-			sleep(1);
+			usleep(100000);
 			$post_text = "This is reply number $i to the Test Topic 4 to test moderation actions from MCP/View topic page.";
 			$post[$i] = $this->create_post(2, $post[0]['topic_id'], 'Re: Test Topic 4', $post_text);
 			$crawler = self::request('GET', "viewtopic.php?p={$post[$i]['post_id']}&sid={$this->sid}#p{$post[$i]['post_id']}");
diff --git a/tests/functional/metadata_manager_test.php b/tests/functional/metadata_manager_test.php
index 206a72b2eb..f74252d7df 100644
--- a/tests/functional/metadata_manager_test.php
+++ b/tests/functional/metadata_manager_test.php
@@ -24,7 +24,10 @@ class phpbb_functional_metadata_manager_test extends phpbb_functional_test_case
 
 	protected function tearDown(): void
 	{
-		$this->uninstall_ext('foo/bar');
+		if (self::$tests_count == 1)
+		{
+			$this->uninstall_ext('foo/bar');
+		}
 
 		parent::tearDown();
 	}
@@ -55,7 +58,7 @@ class phpbb_functional_metadata_manager_test extends phpbb_functional_test_case
 
 	protected static function setup_extensions()
 	{
-		return ['foo/bar'];
+		return self::$tests_count == self::$tests_number ? ['foo/bar'] : [];
 	}
 
 	public function test_extensions_list()
diff --git a/tests/functional/prune_shadow_topic_test.php b/tests/functional/prune_shadow_topic_test.php
index 698acc7550..366ddf0af6 100644
--- a/tests/functional/prune_shadow_topic_test.php
+++ b/tests/functional/prune_shadow_topic_test.php
@@ -133,7 +133,7 @@ class phpbb_functional_prune_shadow_topic_test extends phpbb_functional_test_cas
 		self::request('GET', "app.php/cron/cron.task.core.prune_shadow_topics?f={$this->data['forums']['Prune Shadow']}&sid={$this->sid}", array(), false);
 
 		// Try to ensure that the cron can actually run before we start to wait for it
-		sleep(1);
+		usleep(100000);
 		$cron_lock = new \phpbb\lock\db('cron_lock', new \phpbb\config\db($this->db, new \phpbb\cache\driver\dummy(), 'phpbb_config'), $this->db);
 		while (!$cron_lock->acquire())
 		{
diff --git a/tests/functional/search/base.php b/tests/functional/search/base.php
index 53b251b208..ddf2e7564f 100644
--- a/tests/functional/search/base.php
+++ b/tests/functional/search/base.php
@@ -137,8 +137,6 @@ abstract class phpbb_functional_search_base extends phpbb_functional_test_case
 		$this->login();
 		$this->admin_login();
 
-		$this->create_search_index('phpbb\\search\\backend\\fulltext_native');
-
 		$post = $this->create_topic(2, 'Test Topic 1 foosubject', 'This is a test topic posted by the barsearch testing framework.');
 		$topic_multiple_results_count1 = $this->create_topic(2, 'Test Topic for multiple search results', 'This is a test topic posted to test multiple results count.');
 		$this->create_post(2, $topic_multiple_results_count1['topic_id'], 'Re: Test Topic for multiple search results', 'This is a test post 2 posted to test multiple results count.');
diff --git a/tests/functional/search/mysql_test.php b/tests/functional/search/mysql_test.php
index 50b2d6487b..a4aaef3ab0 100644
--- a/tests/functional/search/mysql_test.php
+++ b/tests/functional/search/mysql_test.php
@@ -20,6 +20,17 @@ class phpbb_functional_search_mysql_test extends phpbb_functional_search_base
 {
 	protected $search_backend = 'phpbb\search\backend\fulltext_mysql';
 
+	protected function setUp(): void
+	{
+		$sql_layer = substr(self::$config['dbms'], strlen('phpbb\\db\\driver\\'));
+		if ($sql_layer !== 'mysqli') // MySQL search backend runs on MySQL/MariaDB only
+		{
+			$this->markTestSkipped($sql_layer . ': MySQL search is not supported');
+		}
+
+		parent::setUp();
+	}
+
 	protected function create_search_index($backend = null)
 	{
 		parent::create_search_index($backend);
diff --git a/tests/functional/search/postgres_test.php b/tests/functional/search/postgres_test.php
index 4389705d66..6851a29e80 100644
--- a/tests/functional/search/postgres_test.php
+++ b/tests/functional/search/postgres_test.php
@@ -20,4 +20,14 @@ class phpbb_functional_search_postgres_test extends phpbb_functional_search_base
 {
 	protected $search_backend = 'phpbb\search\backend\fulltext_postgres';
 
+	protected function setUp(): void
+	{
+		$sql_layer = substr(self::$config['dbms'], strlen('phpbb\\db\\driver\\'));
+		if ($sql_layer !== 'postgres') // PostgreSQL search backend runs on PostgreSQL only
+		{
+			$this->markTestSkipped($sql_layer . ': PostgreSQL search is not supported');
+		}
+
+		parent::setUp();
+	}
 }
diff --git a/tests/functional/search/sphinx_test.php b/tests/functional/search/sphinx_test.php
index e72228f387..01ccd1bb7f 100644
--- a/tests/functional/search/sphinx_test.php
+++ b/tests/functional/search/sphinx_test.php
@@ -20,6 +20,17 @@ class phpbb_functional_search_sphinx_test extends phpbb_functional_search_base
 {
 	protected $search_backend = 'phpbb\search\backend\fulltext_sphinx';
 
+	protected function setUp(): void
+	{
+		$sql_layer = substr(self::$config['dbms'], strlen('phpbb\\db\\driver\\'));
+		if ($sql_layer !== 'mysqli') // Sphinx search backend runs on MySQL/MariaDB only so far
+		{
+			$this->markTestSkipped($sql_layer . ': Sphinx search is not supported');
+		}
+
+		parent::setUp();
+	}
+
 	protected function create_search_index($backend = null)
 	{
 		parent::create_search_index($backend);
@@ -35,16 +46,4 @@ class phpbb_functional_search_sphinx_test extends phpbb_functional_search_base
 			exec('sudo -S service sphinxsearch start', $output, $retval); // Attempt to start sphinxsearch service again
 		}
 	}
-
-	public function test_search_backend()
-	{
-		if ($this->db->sql_layer != 'mysqli') // Sphinx test runs on MySQL/MariaDB only so far
-		{
-			$this->markTestIncomplete('Sphinx Tests are not supported');
-		}
-		else
-		{
-			parent::test_search_backend();
-		}
-	}
 }
diff --git a/tests/test_framework/phpbb_functional_test_case.php b/tests/test_framework/phpbb_functional_test_case.php
index 9e7e0e4679..dfdb62c7e5 100644
--- a/tests/test_framework/phpbb_functional_test_case.php
+++ b/tests/test_framework/phpbb_functional_test_case.php
@@ -48,6 +48,8 @@ class phpbb_functional_test_case extends phpbb_test_case
 
 	protected static $config = array();
 	protected static $already_installed = false;
+	protected static $tests_count = 0;
+	protected static $tests_number = 0;
 
 	static public function setUpBeforeClass(): void
 	{
@@ -73,6 +75,12 @@ class phpbb_functional_test_case extends phpbb_test_case
 			self::install_board();
 			self::$already_installed = true;
 		}
+
+		self::$tests_number = self::$tests_count = count(array_filter(get_class_methods(static::class), function($val)
+			{
+				return str_starts_with($val, 'test_');
+			})
+		);
 	}
 
 	/**
@@ -143,7 +151,9 @@ class phpbb_functional_test_case extends phpbb_test_case
 	{
 		parent::tearDown();
 
-		if ($this->db instanceof \phpbb\db\driver\driver_interface)
+		self::$tests_count--;
+
+		if (self::$tests_count === 0 && $this->db instanceof \phpbb\db\driver\driver_interface)
 		{
 			// Unset ci_tests_no_lock_posting from config
 			$sql = 'DELETE FROM ' . CONFIG_TABLE . "
@@ -234,7 +244,7 @@ class phpbb_functional_test_case extends phpbb_test_case
 		{
 			$dbms = self::$config['dbms'];
 			$this->db = new $dbms();
-			$this->db->sql_connect(self::$config['dbhost'], self::$config['dbuser'], self::$config['dbpasswd'], self::$config['dbname'], self::$config['dbport']);
+			$this->db->sql_connect(self::$config['dbhost'], self::$config['dbuser'], self::$config['dbpasswd'], self::$config['dbname'], self::$config['dbport'], true);
 		}
 		return $this->db;
 	}

From b51f8bc6e97daba1d252c20a79c646de5912beb3 Mon Sep 17 00:00:00 2001
From: rxu <rxu@mail.ru>
Date: Wed, 24 Sep 2025 23:16:15 +0700
Subject: [PATCH 2/3] [ticket/17543] Use class method to call db object
 instance where possible

PHPBB-17543
---
 tests/functional/acp_registration_test.php    |  6 +-
 tests/functional/auth_test.php                |  5 +-
 tests/functional/forum_style_test.php         |  5 +-
 tests/functional/plupload_test.php            |  3 +-
 tests/functional/search/mysql_test.php        |  7 +-
 tests/functional/session_page_update_test.php | 16 ++---
 tests/functional/smilies_test.php             | 11 ++-
 tests/functional/switch_permissions_test.php  |  7 +-
 tests/functional/ucp_allow_pm_test.php        |  5 +-
 tests/functional/ucp_profile_test.php         |  7 +-
 tests/functional/user_password_reset_test.php | 13 ++--
 tests/functional/viewonline_test.php          | 16 ++---
 .../phpbb_functional_test_case.php            | 69 +++++++++----------
 13 files changed, 73 insertions(+), 97 deletions(-)

diff --git a/tests/functional/acp_registration_test.php b/tests/functional/acp_registration_test.php
index ef9843679e..08601f2d2e 100644
--- a/tests/functional/acp_registration_test.php
+++ b/tests/functional/acp_registration_test.php
@@ -28,9 +28,7 @@ class phpbb_functional_acp_registration_test extends phpbb_functional_test_case
 
 	public function test_submitting_activation_method()
 	{
-		$db = $this->get_db();
-
-		$this->set_email_enable($db, false);
+		$this->set_email_enable($this->db, false);
 
 		$this->add_lang('acp/board');
 		$this->login();
@@ -50,6 +48,6 @@ class phpbb_functional_acp_registration_test extends phpbb_functional_test_case
 		$crawler = self::submit($form);
 		$this->assertNotContainsLang('ACC_ACTIVATION_WARNING', $crawler->filter('div.main')->text());
 
-		$this->set_email_enable($db, true);
+		$this->set_email_enable($this->db, true);
 	}
 }
diff --git a/tests/functional/auth_test.php b/tests/functional/auth_test.php
index a0c96b21ea..d2cf623b4a 100644
--- a/tests/functional/auth_test.php
+++ b/tests/functional/auth_test.php
@@ -40,15 +40,14 @@ class phpbb_functional_auth_test extends phpbb_functional_test_case
 	{
 		global $cache, $config;
 		$cache = new phpbb_mock_null_cache;
-		$db = $this->get_db();
 		$sql = 'UPDATE ' . CONFIG_TABLE . " SET config_value = 'foobar' WHERE config_name = 'auth_method'";
-		$db->sql_query($sql);
+		$this->db->sql_query($sql);
 		$config['auth_method'] = 'foobar';
 		$this->login('anothertestuser');
 		$crawler = self::request('GET', 'index.php');
 		$this->assertStringContainsString('anothertestuser', $crawler->filter('#username_logged_in')->text());
 		$sql = 'UPDATE ' . CONFIG_TABLE . " SET config_value = 'db' WHERE config_name =  'auth_method'";
-		$db->sql_query($sql);
+		$this->db->sql_query($sql);
 		$config['auth_method'] = 'db';
 	}
 
diff --git a/tests/functional/forum_style_test.php b/tests/functional/forum_style_test.php
index c397c9d7fb..e2d5fdd129 100644
--- a/tests/functional/forum_style_test.php
+++ b/tests/functional/forum_style_test.php
@@ -30,9 +30,8 @@ class phpbb_functional_forum_style_test extends phpbb_functional_test_case
 
 	public function test_custom_forum_style()
 	{
-		$db = $this->get_db();
 		$this->add_style(2, 'test_style');
-		$db->sql_query('UPDATE ' . FORUMS_TABLE . ' SET forum_style = 2 WHERE forum_id = 2');
+		$this->db->sql_query('UPDATE ' . FORUMS_TABLE . ' SET forum_style = 2 WHERE forum_id = 2');
 
 		$crawler = self::request('GET', 'viewtopic.php?t=1&f=2');
 		$this->assertStringContainsString('styles/test_style/', $crawler->filter('head > link[rel=stylesheet]')->eq(1)->attr('href'));
@@ -43,7 +42,7 @@ class phpbb_functional_forum_style_test extends phpbb_functional_test_case
 		$crawler = self::request('GET', 'viewtopic.php?t=1&view=next');
 		$this->assertStringContainsString('styles/test_style/', $crawler->filter('head > link[rel=stylesheet]')->eq(1)->attr('href'));
 
-		$db->sql_query('UPDATE ' . FORUMS_TABLE . ' SET forum_style = 0 WHERE forum_id = 2');
+		$this->db->sql_query('UPDATE ' . FORUMS_TABLE . ' SET forum_style = 0 WHERE forum_id = 2');
 		$this->delete_style(2, 'test_style');
 	}
 }
diff --git a/tests/functional/plupload_test.php b/tests/functional/plupload_test.php
index 2883642bf2..efe64c688c 100644
--- a/tests/functional/plupload_test.php
+++ b/tests/functional/plupload_test.php
@@ -21,13 +21,12 @@ class phpbb_functional_plupload_test extends phpbb_functional_test_case
 
 	protected function set_extension_group_permission($val)
 	{
-		$db = $this->get_db();
 		$query = "
 			UPDATE phpbb_extension_groups
 			SET allow_in_pm = '$val'
 			WHERE group_name = 'IMAGES'
 		";
-		$db->sql_query($query);
+		$this->db->sql_query($query);
 	}
 
 	protected function setUp(): void
diff --git a/tests/functional/search/mysql_test.php b/tests/functional/search/mysql_test.php
index a4aaef3ab0..ef3a273f2a 100644
--- a/tests/functional/search/mysql_test.php
+++ b/tests/functional/search/mysql_test.php
@@ -38,10 +38,9 @@ class phpbb_functional_search_mysql_test extends phpbb_functional_search_base
 		// Try optimizing posts table after creating search index.
 		// Some versions of MariaDB might not return any results in the search
 		// until the table has been optimized or the index deleted and re-created.
-		$db = $this->get_db();
-		$db->sql_return_on_error(true);
+		$this->db->sql_return_on_error(true);
 		$sql = 'OPTIMIZE TABLE ' . POSTS_TABLE;
-		$db->sql_query($sql);
-		$db->sql_return_on_error(false);
+		$this->db->sql_query($sql);
+		$this->db->sql_return_on_error(false);
 	}
 }
diff --git a/tests/functional/session_page_update_test.php b/tests/functional/session_page_update_test.php
index 125b12dad0..66b610f01d 100644
--- a/tests/functional/session_page_update_test.php
+++ b/tests/functional/session_page_update_test.php
@@ -21,35 +21,29 @@ class phpbb_functional_session_page_update_test extends phpbb_functional_test_ca
 	{
 		parent::setUp();
 
-		global $db;
-
-		$db = $this->db;
-
 		// Delete previous session info for admin user
 		$sql = 'DELETE FROM ' . SESSIONS_TABLE . ' WHERE session_user_id = 2';
-		$db->sql_query($sql);
+		$this->db->sql_query($sql);
 
 		$this->login();
 	}
 
 	public function test_session_page_update()
 	{
-		$db = $this->get_db();
-
 		// Request index page
 		self::request('GET', 'index.php');
 		$this->assertEquals(200, self::$client->getInternalResponse()->getStatusCode(), 'Failed asserting that status of index page is 200');
 
 		$sql = 'SELECT session_page FROM ' . SESSIONS_TABLE . ' WHERE session_user_id = 2 ORDER BY session_time DESC';
-		$db->sql_query_limit($sql, 1);
-		$this->assertEquals('index.php', $db->sql_fetchfield('session_page'), 'Failed asserting that session_page is index.php for admin user');
+		$this->db->sql_query_limit($sql, 1);
+		$this->assertEquals('index.php', $this->db->sql_fetchfield('session_page'), 'Failed asserting that session_page is index.php for admin user');
 
 		// Request non-existent url
 		self::request('GET', 'nonexistent.jpg', [], false);
 		$this->assertEquals(404, self::$client->getInternalResponse()->getStatusCode(), 'Failed asserting that status of non-existent image is 404');
 
-		$db->sql_query_limit($sql, 1);
+		$this->db->sql_query_limit($sql, 1);
 		// User page should not be updated to non-existent one
-		$this->assertEquals('index.php', $db->sql_fetchfield('session_page'), 'Failed asserting that session page has not changed after 404');
+		$this->assertEquals('index.php', $this->db->sql_fetchfield('session_page'), 'Failed asserting that session page has not changed after 404');
 	}
 }
diff --git a/tests/functional/smilies_test.php b/tests/functional/smilies_test.php
index 4ee45e9bde..3a77ec89f6 100644
--- a/tests/functional/smilies_test.php
+++ b/tests/functional/smilies_test.php
@@ -21,19 +21,18 @@ class phpbb_functional_smilies_test extends phpbb_functional_test_case
 		$this->login();
 
 		// Get smilies data
-		$db = $this->get_db();
 		$sql_ary = [
 			'SELECT'	=> 's.smiley_url, MIN(s.emotion) AS emotion, MIN(s.code) AS code, s.smiley_width, s.smiley_height, MIN(s.smiley_order) AS min_smiley_order',
 			'FROM'		=> [
 				SMILIES_TABLE => 's',
 			],
 			'GROUP_BY'	=> 's.smiley_url, s.smiley_width, s.smiley_height',
-			'ORDER_BY'	=> $db->sql_quote('min_smiley_order'),
+			'ORDER_BY'	=> $this->db->sql_quote('min_smiley_order'),
 		];
-		$sql = $db->sql_build_query('SELECT', $sql_ary);
-		$result = $db->sql_query($sql);
-		$smilies = $db->sql_fetchrowset($result);
-		$db->sql_freeresult($result);
+		$sql = $this->db->sql_build_query('SELECT', $sql_ary);
+		$result = $this->db->sql_query($sql);
+		$smilies = $this->db->sql_fetchrowset($result);
+		$this->db->sql_freeresult($result);
 
 		// Visit smilies page
 		$crawler = self::request('GET', 'posting.php?mode=smilies');
diff --git a/tests/functional/switch_permissions_test.php b/tests/functional/switch_permissions_test.php
index b7e8819a6e..0dbcf3b2b0 100644
--- a/tests/functional/switch_permissions_test.php
+++ b/tests/functional/switch_permissions_test.php
@@ -73,13 +73,12 @@ class phpbb_functional_switch_permissions_test extends phpbb_functional_test_cas
 	 */
 	public function test_switch_permissions_ucp()
 	{
-		$db = $this->get_db();
 		$sql = 'SELECT user_id
 			FROM ' . USERS_TABLE . "
 			WHERE username = '" . self::TEST_USER . "'";
-		$result = $db->sql_query($sql);
-		$user_id = $db->sql_fetchfield('user_id');
-		$db->sql_freeresult($result);
+		$result = $this->db->sql_query($sql);
+		$user_id = $this->db->sql_fetchfield('user_id');
+		$this->db->sql_freeresult($result);
 
 		// Open memberlist profile page for user
 		$crawler = self::request('GET', "memberlist.php?mode=viewprofile&u={$user_id}&sid={$this->sid}");
diff --git a/tests/functional/ucp_allow_pm_test.php b/tests/functional/ucp_allow_pm_test.php
index 3cdc1d0af6..3859024d58 100644
--- a/tests/functional/ucp_allow_pm_test.php
+++ b/tests/functional/ucp_allow_pm_test.php
@@ -64,11 +64,10 @@ class phpbb_functional_ucp_allow_pm_test extends phpbb_functional_test_case
 	// enable or disable PM for a user, like from ucp
 	protected function set_user_allow_pm($user_id, $allow)
 	{
-		$db = $this->get_db();
 		$sql = 'UPDATE ' . USERS_TABLE . "
 			SET user_allow_pm = " . $allow . "
 			WHERE user_id = " . $user_id;
-		$result = $db->sql_query($sql);
-		$db->sql_freeresult($result);
+		$result = $this->db->sql_query($sql);
+		$this->db->sql_freeresult($result);
 	}
 }
diff --git a/tests/functional/ucp_profile_test.php b/tests/functional/ucp_profile_test.php
index 2790dfaae3..f8ac77cfae 100644
--- a/tests/functional/ucp_profile_test.php
+++ b/tests/functional/ucp_profile_test.php
@@ -73,7 +73,6 @@ class phpbb_functional_ucp_profile_test extends phpbb_functional_test_case
 	{
 		$this->add_lang('ucp');
 		$this->login('admin', true);
-		$db = $this->get_db();
 
 		$crawler = self::request('GET', 'ucp.php?i=ucp_profile&mode=autologin_keys');
 		$this->assertContainsLang('UCP_PROFILE_AUTOLOGIN_KEYS', $crawler->filter('#cp-main h2')->text());
@@ -87,9 +86,9 @@ class phpbb_functional_ucp_profile_test extends phpbb_functional_test_case
 			'WHERE'		=> 'sk.user_id = ' . (int) $user_id,
 			'ORDER_BY'	=> 'sk.last_login ASC',
 		];
-		$result = $db->sql_query_limit($db->sql_build_query('SELECT', $sql_ary), 1);
-		$key_id = substr($db->sql_fetchfield('key_id'), 0, 8);
-		$db->sql_freeresult($result);
+		$result = $this->db->sql_query_limit($this->db->sql_build_query('SELECT', $sql_ary), 1);
+		$key_id = substr($this->db->sql_fetchfield('key_id'), 0, 8);
+		$this->db->sql_freeresult($result);
 
 		$this->assertStringContainsString($key_id, $crawler->filter('label[for="' . $key_id . '"]')->text());
 
diff --git a/tests/functional/user_password_reset_test.php b/tests/functional/user_password_reset_test.php
index e2efccc9b0..09c833fe03 100644
--- a/tests/functional/user_password_reset_test.php
+++ b/tests/functional/user_password_reset_test.php
@@ -241,12 +241,10 @@ class phpbb_functional_user_password_reset_test extends phpbb_functional_test_ca
 		$this->assertNotEmpty($this->user_data['user_actkey']);
 
 		// Change reason for inactivity
-		$db = $this->get_db();
-
 		$sql = 'UPDATE ' . USERS_TABLE . '
 			SET user_inactive_reason = ' . INACTIVE_REMIND . '
 			WHERE user_id = ' . (int) $this->user_data['user_id'];
-		$db->sql_query($sql);
+		$this->db->sql_query($sql);
 
 		$this->add_lang('ucp');
 
@@ -262,12 +260,11 @@ class phpbb_functional_user_password_reset_test extends phpbb_functional_test_ca
 
 	protected function get_user_data($username)
 	{
-		$db = $this->get_db();
 		$sql = 'SELECT user_id, username, user_type, user_email, user_newpasswd, user_lang, user_actkey, user_inactive_reason, reset_token, reset_token_expiration
 			FROM ' . USERS_TABLE . "
-			WHERE username = '" . $db->sql_escape($username) . "'";
-		$result = $db->sql_query($sql);
-		$this->user_data = $db->sql_fetchrow($result);
-		$db->sql_freeresult($result);
+			WHERE username = '" . $this->db->sql_escape($username) . "'";
+		$result = $this->db->sql_query($sql);
+		$this->user_data = $this->db->sql_fetchrow($result);
+		$this->db->sql_freeresult($result);
 	}
 }
diff --git a/tests/functional/viewonline_test.php b/tests/functional/viewonline_test.php
index 882c48a5e1..c30a446ad0 100644
--- a/tests/functional/viewonline_test.php
+++ b/tests/functional/viewonline_test.php
@@ -18,31 +18,27 @@ class phpbb_functional_viewonline_test extends phpbb_functional_test_case
 {
 	protected function get_forum_name_by_topic_id($topic_id)
 	{
-		$db = $this->get_db();
-
 		// Forum info
 		$sql =  'SELECT f.forum_name
 			FROM ' . FORUMS_TABLE . ' f,' . TOPICS_TABLE . ' t
 			WHERE t.forum_id = f.forum_id
 				AND t.topic_id = ' . (int) $topic_id;
-		$result = $db->sql_query($sql);
-		$forum_name = $db->sql_fetchfield('forum_name');
-		$db->sql_freeresult($result, 1800); // cache for 30 minutes
+		$result = $this->db->sql_query($sql);
+		$forum_name = $this->db->sql_fetchfield('forum_name');
+		$this->db->sql_freeresult($result, 1800); // cache for 30 minutes
 
 		return $forum_name;
 	}
 
 	protected function get_forum_name_by_forum_id($forum_id)
 	{
-		$db = $this->get_db();
-
 		// Forum info
 		$sql =  'SELECT forum_name
 			FROM ' . FORUMS_TABLE . '
 			WHERE forum_id = ' . (int) $forum_id;
-		$result = $db->sql_query($sql);
-		$forum_name = $db->sql_fetchfield('forum_name');
-		$db->sql_freeresult($result, 1800); // cache for 30 minutes
+		$result = $this->db->sql_query($sql);
+		$forum_name = $this->db->sql_fetchfield('forum_name');
+		$this->db->sql_freeresult($result, 1800); // cache for 30 minutes
 
 		return $forum_name;
 	}
diff --git a/tests/test_framework/phpbb_functional_test_case.php b/tests/test_framework/phpbb_functional_test_case.php
index dfdb62c7e5..5b3ec5c667 100644
--- a/tests/test_framework/phpbb_functional_test_case.php
+++ b/tests/test_framework/phpbb_functional_test_case.php
@@ -119,15 +119,15 @@ class phpbb_functional_test_case extends phpbb_test_case
 		$this->lang = array();
 		$this->add_lang('common');
 
-		$db = $this->get_db();
+		$this->get_db();
 
 		// Special flag for testing without possibility to run into lock scenario.
 		// Unset entry and add it back if lock behavior for posting should be tested.
 		// Unset ci_tests_no_lock_posting from config
-		$db->sql_return_on_error(true);
+		$this->db->sql_return_on_error(true);
 		$sql = 'INSERT INTO ' . CONFIG_TABLE . " (config_name, config_value) VALUES ('ci_tests_no_lock_posting', '1')";
 		$this->db->sql_query($sql);
-		$db->sql_return_on_error(false);
+		$this->db->sql_return_on_error(false);
 
 		foreach (static::setup_extensions() as $extension)
 		{
@@ -135,10 +135,10 @@ class phpbb_functional_test_case extends phpbb_test_case
 
 			$sql = 'SELECT ext_active
 				FROM ' . EXT_TABLE . "
-				WHERE ext_name = '" . $db->sql_escape($extension). "'";
-			$result = $db->sql_query($sql);
-			$status = (bool) $db->sql_fetchfield('ext_active');
-			$db->sql_freeresult($result);
+				WHERE ext_name = '" . $this->db->sql_escape($extension). "'";
+			$result = $this->db->sql_query($sql);
+			$status = (bool) $this->db->sql_fetchfield('ext_active');
+			$this->db->sql_freeresult($result);
 
 			if (!$status)
 			{
@@ -289,7 +289,7 @@ class phpbb_functional_test_case extends phpbb_test_case
 		global $phpbb_root_path, $phpEx;
 
 		$config = new \phpbb\config\config(array('version' => PHPBB_VERSION));
-		$db = $this->get_db();
+		$this->get_db();
 		$db_doctrine = $this->get_db_doctrine();
 		$factory = new \phpbb\db\tools\factory();
 		$finder_factory = new \phpbb\finder\factory(null, false, $phpbb_root_path, $phpEx);
@@ -300,7 +300,7 @@ class phpbb_functional_test_case extends phpbb_test_case
 		$migrator = new \phpbb\db\migrator(
 			$container,
 			$config,
-			$db,
+			$this->db,
 			$db_tools,
 			self::$config['table_prefix'] . 'migrations',
 			$phpbb_root_path,
@@ -322,7 +322,7 @@ class phpbb_functional_test_case extends phpbb_test_case
 
 		$extension_manager = new \phpbb\extension\manager(
 			$container,
-			$db,
+			$this->db,
 			$config,
 			$finder_factory,
 			self::$config['table_prefix'] . 'ext',
@@ -737,10 +737,10 @@ class phpbb_functional_test_case extends phpbb_test_case
 	{
 		global $phpbb_root_path;
 
-		$db = $this->get_db();
+		$this->get_db();
 		if (version_compare(PHPBB_VERSION, '3.1.0-dev', '<'))
 		{
-			$sql = 'INSERT INTO ' . STYLES_TABLE . ' ' . $db->sql_build_array('INSERT', array(
+			$sql = 'INSERT INTO ' . STYLES_TABLE . ' ' . $this->db->sql_build_array('INSERT', array(
 				'style_id' => $style_id,
 				'style_name' => $style_path,
 				'style_copyright' => '',
@@ -749,17 +749,17 @@ class phpbb_functional_test_case extends phpbb_test_case
 				'theme_id' => $style_id,
 				'imageset_id' => $style_id,
 			));
-			$db->sql_query($sql);
+			$this->db->sql_query($sql);
 
-			$sql = 'INSERT INTO ' . STYLES_IMAGESET_TABLE . ' ' . $db->sql_build_array('INSERT', array(
+			$sql = 'INSERT INTO ' . STYLES_IMAGESET_TABLE . ' ' . $this->db->sql_build_array('INSERT', array(
 				'imageset_id' => $style_id,
 				'imageset_name' => $style_path,
 				'imageset_copyright' => '',
 				'imageset_path' => $style_path,
 			));
-			$db->sql_query($sql);
+			$this->db->sql_query($sql);
 
-			$sql = 'INSERT INTO ' . STYLES_TEMPLATE_TABLE . ' ' . $db->sql_build_array('INSERT', array(
+			$sql = 'INSERT INTO ' . STYLES_TEMPLATE_TABLE . ' ' . $this->db->sql_build_array('INSERT', array(
 				'template_id' => $style_id,
 				'template_name' => $style_path,
 				'template_copyright' => '',
@@ -768,9 +768,9 @@ class phpbb_functional_test_case extends phpbb_test_case
 				'template_inherits_id' => $parent_style_id,
 				'template_inherit_path' => $parent_style_path,
 			));
-			$db->sql_query($sql);
+			$this->db->sql_query($sql);
 
-			$sql = 'INSERT INTO ' . STYLES_THEME_TABLE . ' ' . $db->sql_build_array('INSERT', array(
+			$sql = 'INSERT INTO ' . STYLES_THEME_TABLE . ' ' . $this->db->sql_build_array('INSERT', array(
 				'theme_id' => $style_id,
 				'theme_name' => $style_path,
 				'theme_copyright' => '',
@@ -779,7 +779,7 @@ class phpbb_functional_test_case extends phpbb_test_case
 				'theme_mtime' => 0,
 				'theme_data' => '',
 			));
-			$db->sql_query($sql);
+			$this->db->sql_query($sql);
 
 			if ($style_path != 'prosilver')
 			{
@@ -789,7 +789,7 @@ class phpbb_functional_test_case extends phpbb_test_case
 		}
 		else
 		{
-			$db->sql_multi_insert(STYLES_TABLE, array(array(
+			$this->db->sql_multi_insert(STYLES_TABLE, array(array(
 				'style_name' => $style_path,
 				'style_copyright' => '',
 				'style_active' => 1,
@@ -811,13 +811,13 @@ class phpbb_functional_test_case extends phpbb_test_case
 	{
 		global $phpbb_root_path;
 
-		$db = $this->get_db();
-		$db->sql_query('DELETE FROM ' . STYLES_TABLE . ' WHERE style_id = ' . $style_id);
+		$this->get_db();
+		$this->db->sql_query('DELETE FROM ' . STYLES_TABLE . ' WHERE style_id = ' . $style_id);
 		if (version_compare(PHPBB_VERSION, '3.1.0-dev', '<'))
 		{
-			$db->sql_query('DELETE FROM ' . STYLES_IMAGESET_TABLE . ' WHERE imageset_id = ' . $style_id);
-			$db->sql_query('DELETE FROM ' . STYLES_TEMPLATE_TABLE . ' WHERE template_id = ' . $style_id);
-			$db->sql_query('DELETE FROM ' . STYLES_THEME_TABLE . ' WHERE theme_id = ' . $style_id);
+			$this->db->sql_query('DELETE FROM ' . STYLES_IMAGESET_TABLE . ' WHERE imageset_id = ' . $style_id);
+			$this->db->sql_query('DELETE FROM ' . STYLES_TEMPLATE_TABLE . ' WHERE template_id = ' . $style_id);
+			$this->db->sql_query('DELETE FROM ' . STYLES_THEME_TABLE . ' WHERE theme_id = ' . $style_id);
 
 			if ($style_path != 'prosilver')
 			{
@@ -904,13 +904,13 @@ class phpbb_functional_test_case extends phpbb_test_case
 	 */
 	protected function get_group_id($group_name)
 	{
-		$db = $this->get_db();
+		$this->get_db();
 		$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);
+			WHERE group_name = '" . $this->db->sql_escape($group_name) . "'";
+		$result = $this->db->sql_query($sql);
+		$group_id = (int) $this->db->sql_fetchfield('group_id');
+		$this->db->sql_freeresult($result);
 
 		return $group_id;
 	}
@@ -922,13 +922,12 @@ class phpbb_functional_test_case extends phpbb_test_case
 	 */
 	protected function get_search_type()
 	{
-		$db = $this->get_db();
 		$sql = 'SELECT config_value as search_type
 			FROM ' . CONFIG_TABLE . "
-			WHERE config_name = '" . $db->sql_escape('search_type') . "'";
-		$result = $db->sql_query($sql);
-		$search_type = $db->sql_fetchfield('search_type');
-		$db->sql_freeresult($result);
+			WHERE config_name = '" . $this->db->sql_escape('search_type') . "'";
+		$result = $this->db->sql_query($sql);
+		$search_type = $this->db->sql_fetchfield('search_type');
+		$this->db->sql_freeresult($result);
 
 		return $search_type;
 	}

From f131e31bc781b14a47dd1b4ba919b7bf4322e309 Mon Sep 17 00:00:00 2001
From: rxu <rxu@mail.ru>
Date: Thu, 25 Sep 2025 21:21:44 +0700
Subject: [PATCH 3/3] [ticket/17543] Optimize installing extensions

Make several functions static to be able to use in *BeforeClass() methods.

PHPBB-17543
---
 tests/functional/acp_permissions_test.php     |   1 +
 tests/functional/download_test.php            |   2 -
 .../functional/extension_controller_test.php  |  25 +-
 tests/functional/extension_module_test.php    |  22 +-
 .../extension_template_event_order_test.php   |  28 +-
 tests/functional/feed_test.php                |   2 -
 tests/functional/metadata_manager_test.php    |  18 +-
 tests/functional/prune_shadow_topic_test.php  |   5 -
 tests/functional/subforum_test.php            |   1 -
 tests/functional/ucp_groups_test.php          |   6 -
 tests/functional/user_password_reset_test.php |  11 -
 tests/functional/viewforum_paging_test.php    |   4 -
 .../functional/visibility_disapprove_test.php |   4 -
 .../functional/visibility_reapprove_test.php  |   4 -
 .../functional/visibility_softdelete_test.php |   4 -
 .../visibility_unapproved_posts_test.php      |   4 -
 .../phpbb_functional_test_case.php            | 291 +++++++++---------
 17 files changed, 177 insertions(+), 255 deletions(-)

diff --git a/tests/functional/acp_permissions_test.php b/tests/functional/acp_permissions_test.php
index fb092a7ff1..355dd1a21d 100644
--- a/tests/functional/acp_permissions_test.php
+++ b/tests/functional/acp_permissions_test.php
@@ -98,6 +98,7 @@ class phpbb_functional_acp_permissions_test extends phpbb_functional_test_case
 		// XXX globals for \phpbb\auth\auth, refactor it later
 		global $db, $cache;
 		$db = $this->get_db();
+
 		$cache = new phpbb_mock_null_cache;
 
 		$auth = new \phpbb\auth\auth;
diff --git a/tests/functional/download_test.php b/tests/functional/download_test.php
index df2a7cbb26..ec67e9e42a 100644
--- a/tests/functional/download_test.php
+++ b/tests/functional/download_test.php
@@ -225,8 +225,6 @@ class phpbb_functional_download_test extends phpbb_functional_test_case
 
 	public function load_ids($data)
 	{
-		$this->db = $this->get_db();
-
 		if (!empty($data['forums']))
 		{
 			array_walk($data['forums'], function(&$value, $key)
diff --git a/tests/functional/extension_controller_test.php b/tests/functional/extension_controller_test.php
index 451565c186..b5ccbf2bcf 100644
--- a/tests/functional/extension_controller_test.php
+++ b/tests/functional/extension_controller_test.php
@@ -22,26 +22,26 @@ class phpbb_functional_extension_controller_test extends phpbb_functional_test_c
 		'./',
 	);
 
-	static public function setUpBeforeClass(): void
+	public static function setUpBeforeClass(): void
 	{
 		parent::setUpBeforeClass();
 
 		self::$helper = new phpbb_test_case_helpers(__CLASS__);
 		self::$helper->copy_ext_fixtures(__DIR__ . '/fixtures/ext/', self::$fixtures);
+
+		self::install_ext('foo/bar');
+		self::install_ext('foo/foo');
 	}
 
-	static public function tearDownAfterClass(): void
+	public static function tearDownAfterClass(): void
 	{
 		parent::tearDownAfterClass();
 
+		self::uninstall_ext('foo/bar');
+		self::uninstall_ext('foo/foo');
 		self::$helper->restore_original_ext_dir();
 	}
 
-	protected static function setup_extensions()
-	{
-		return self::$tests_count == self::$tests_number ? ['foo/bar', 'foo/foo'] : [];
-	}
-
 	protected function setUp(): void
 	{
 		parent::setUp();
@@ -49,17 +49,6 @@ class phpbb_functional_extension_controller_test extends phpbb_functional_test_c
 		$this->purge_cache();
 	}
 
-	protected function tearDown(): void
-	{
-		if (self::$tests_count == 1)
-		{
-			$this->uninstall_ext('foo/bar');
-			$this->uninstall_ext('foo/foo');
-		}
-
-		parent::tearDown();
-	}
-
 	/**
 	* Check a controller for extension foo/bar.
 	*/
diff --git a/tests/functional/extension_module_test.php b/tests/functional/extension_module_test.php
index cc7f5b1605..9f7f44fb9d 100644
--- a/tests/functional/extension_module_test.php
+++ b/tests/functional/extension_module_test.php
@@ -23,36 +23,24 @@ class phpbb_functional_extension_module_test extends phpbb_functional_test_case
 		'./',
 	);
 
-	static public function setUpBeforeClass(): void
+	public static function setUpBeforeClass(): void
 	{
 		parent::setUpBeforeClass();
 
 		self::$helper = new phpbb_test_case_helpers(__CLASS__);
 		self::$helper->copy_ext_fixtures(__DIR__ . '/fixtures/ext/', self::$fixtures);
+
+		self::install_ext('foo/bar');
 	}
 
-	static public function tearDownAfterClass(): void
+	public static function tearDownAfterClass(): void
 	{
 		parent::tearDownAfterClass();
 
+		self::uninstall_ext('foo/bar');
 		self::$helper->restore_original_ext_dir();
 	}
 
-	protected function tearDown(): void
-	{
-		if (self::$tests_count == 1)
-		{
-			$this->uninstall_ext('foo/bar');
-		}
-
-		parent::tearDown();
-	}
-
-	protected static function setup_extensions()
-	{
-		return self::$tests_count == self::$tests_number ? ['foo/bar'] : [];
-	}
-
 	public function test_acp()
 	{
 		$this->add_lang('common');
diff --git a/tests/functional/extension_template_event_order_test.php b/tests/functional/extension_template_event_order_test.php
index 596f46ca3e..c32e9442b8 100644
--- a/tests/functional/extension_template_event_order_test.php
+++ b/tests/functional/extension_template_event_order_test.php
@@ -16,24 +16,29 @@
  */
 class phpbb_functional_extension_template_event_order_test extends phpbb_functional_test_case
 {
-	static private $helper;
+	private static $helper;
 
-	static protected $fixtures = [
+	protected static $fixtures = [
 		'./',
 	];
 
-	static public function setUpBeforeClass(): void
+	public static function setUpBeforeClass(): void
 	{
 		parent::setUpBeforeClass();
 
 		self::$helper = new phpbb_test_case_helpers(__CLASS__);
 		self::$helper->copy_ext_fixtures(__DIR__ . '/fixtures/ext/', self::$fixtures);
+
+		self::install_ext('foo/bar');
+		self::install_ext('foo/foo');
 	}
 
-	static public function tearDownAfterClass(): void
+	public static function tearDownAfterClass(): void
 	{
 		parent::tearDownAfterClass();
 
+		self::uninstall_ext('foo/bar');
+		self::uninstall_ext('foo/foo');
 		self::$helper->restore_original_ext_dir();
 	}
 
@@ -44,21 +49,6 @@ class phpbb_functional_extension_template_event_order_test extends phpbb_functio
 		$this->purge_cache();
 	}
 
-	protected function tearDown(): void
-	{
-		if (self::$tests_count == 1)
-		{
-			$this->uninstall_ext('foo/bar');
-			$this->uninstall_ext('foo/foo');
-		}
-
-		parent::tearDown();
-	}
-
-	protected static function setup_extensions()
-	{
-		return self::$tests_count == self::$tests_number ? ['foo/bar', 'foo/foo'] : [];
-	}
 
 	/**
 	 * Check extensions template event listener prioritizing
diff --git a/tests/functional/feed_test.php b/tests/functional/feed_test.php
index a225cf3f56..16f4f2f779 100644
--- a/tests/functional/feed_test.php
+++ b/tests/functional/feed_test.php
@@ -1450,8 +1450,6 @@ class phpbb_functional_feed_test extends phpbb_functional_test_case
 
 	protected function load_ids($data)
 	{
-		$this->db = $this->get_db();
-
 		if (!empty($data['forums']))
 		{
 			$sql = 'SELECT *
diff --git a/tests/functional/metadata_manager_test.php b/tests/functional/metadata_manager_test.php
index f74252d7df..9744bf08a7 100644
--- a/tests/functional/metadata_manager_test.php
+++ b/tests/functional/metadata_manager_test.php
@@ -22,28 +22,21 @@ class phpbb_functional_metadata_manager_test extends phpbb_functional_test_case
 		'./',
 	);
 
-	protected function tearDown(): void
-	{
-		if (self::$tests_count == 1)
-		{
-			$this->uninstall_ext('foo/bar');
-		}
-
-		parent::tearDown();
-	}
-
 	public static function setUpBeforeClass(): void
 	{
 		parent::setUpBeforeClass();
 
 		self::$helper = new phpbb_test_case_helpers(__CLASS__);
 		self::$helper->copy_ext_fixtures(__DIR__ . '/fixtures/ext/', self::$fixtures);
+
+		self::install_ext('foo/bar');
 	}
 
 	public static function tearDownAfterClass(): void
 	{
 		parent::tearDownAfterClass();
 
+		self::uninstall_ext('foo/bar');
 		self::$helper->restore_original_ext_dir();
 	}
 
@@ -56,11 +49,6 @@ class phpbb_functional_metadata_manager_test extends phpbb_functional_test_case
 		$this->add_lang('acp/extensions');
 	}
 
-	protected static function setup_extensions()
-	{
-		return self::$tests_count == self::$tests_number ? ['foo/bar'] : [];
-	}
-
 	public function test_extensions_list()
 	{
 		$crawler = self::request('GET', 'adm/index.php?i=acp_extensions&mode=main&sid=' . $this->sid);
diff --git a/tests/functional/prune_shadow_topic_test.php b/tests/functional/prune_shadow_topic_test.php
index 366ddf0af6..125c3b90b9 100644
--- a/tests/functional/prune_shadow_topic_test.php
+++ b/tests/functional/prune_shadow_topic_test.php
@@ -121,7 +121,6 @@ class phpbb_functional_prune_shadow_topic_test extends phpbb_functional_test_cas
 			'forum_topics_softdeleted'	=> 0,
 		), 'after moving');
 
-		$this->db = $this->get_db();
 		// Date topic 3 days back
 		$sql = 'UPDATE phpbb_topics
 			SET topic_last_post_time = ' . (time() - 60*60*24*3) . '
@@ -153,8 +152,6 @@ class phpbb_functional_prune_shadow_topic_test extends phpbb_functional_test_cas
 
 	public function assert_forum_details($forum_id, $details, $additional_error_message = '')
 	{
-		$this->db = $this->get_db();
-
 		$sql = 'SELECT ' . implode(', ', array_keys($details)) . '
 			FROM phpbb_forums
 			WHERE forum_id = ' . (int) $forum_id;
@@ -167,8 +164,6 @@ class phpbb_functional_prune_shadow_topic_test extends phpbb_functional_test_cas
 
 	public function load_ids($data)
 	{
-		$this->db = $this->get_db();
-
 		if (!empty($data['forums']))
 		{
 			$sql = 'SELECT *
diff --git a/tests/functional/subforum_test.php b/tests/functional/subforum_test.php
index 493c2053da..91a7e77754 100644
--- a/tests/functional/subforum_test.php
+++ b/tests/functional/subforum_test.php
@@ -91,7 +91,6 @@ class phpbb_functional_subforum_test extends phpbb_functional_test_case
 
 	protected function get_forum_id($forum_name)
 	{
-		$this->db = $this->get_db();
 		$forum_id = 0;
 
 		$sql = 'SELECT *
diff --git a/tests/functional/ucp_groups_test.php b/tests/functional/ucp_groups_test.php
index 387ae827e4..6e18d610ce 100644
--- a/tests/functional/ucp_groups_test.php
+++ b/tests/functional/ucp_groups_test.php
@@ -18,8 +18,6 @@ require_once __DIR__ . '/common_groups_test_case.php';
 */
 class phpbb_functional_ucp_groups_test extends phpbb_functional_common_groups_test_case
 {
-	protected $db;
-
 	protected function get_url()
 	{
 		return 'ucp.php?i=groups&mode=manage&action=edit';
@@ -27,10 +25,6 @@ class phpbb_functional_ucp_groups_test extends phpbb_functional_common_groups_te
 
 	protected function get_teampage_settings()
 	{
-		if (!isset($this->db))
-		{
-			$this->db = $this->get_db();
-		}
 		$sql = 'SELECT g.group_legend AS group_legend, t.teampage_position AS group_teampage
 			FROM ' . GROUPS_TABLE . ' g
 			LEFT JOIN ' . TEAMPAGE_TABLE . ' t
diff --git a/tests/functional/user_password_reset_test.php b/tests/functional/user_password_reset_test.php
index 09c833fe03..b9f1ad4fd6 100644
--- a/tests/functional/user_password_reset_test.php
+++ b/tests/functional/user_password_reset_test.php
@@ -153,17 +153,6 @@ class phpbb_functional_user_password_reset_test extends phpbb_functional_test_ca
 		$crawler = self::submit($form, array('username' => self::TEST_USER, 'password' => self::TEST_USER));
 		$this->assertStringNotContainsString($this->lang('LOGIN'), $crawler->filter('.navbar')->text());
 
-		$cookies = self::$cookieJar->all();
-
-		// The session id is stored in a cookie that ends with _sid - we assume there is only one such cookie
-		foreach ($cookies as $cookie)
-		{
-			if (substr($cookie->getName(), -4) == '_sid')
-			{
-				$this->sid = $cookie->getValue();
-			}
-		}
-
 		$this->logout();
 
 		$crawler = self::request('GET', 'ucp.php');
diff --git a/tests/functional/viewforum_paging_test.php b/tests/functional/viewforum_paging_test.php
index 2ba29cecc6..0a2cd38b3a 100644
--- a/tests/functional/viewforum_paging_test.php
+++ b/tests/functional/viewforum_paging_test.php
@@ -163,8 +163,6 @@ class viewforum_paging_test extends phpbb_functional_test_case
 
 	protected function assert_forum_details($forum_id, $details, $additional_error_message = '')
 	{
-		$this->db = $this->get_db();
-
 		$sql = 'SELECT ' . implode(', ', array_keys($details)) . '
 			FROM phpbb_forums
 			WHERE forum_id = ' . (int) $forum_id;
@@ -203,8 +201,6 @@ class viewforum_paging_test extends phpbb_functional_test_case
 	 */
 	protected function load_ids($data)
 	{
-		$this->db = $this->get_db();
-
 		if (!empty($data['forums']))
 		{
 			$sql = 'SELECT *
diff --git a/tests/functional/visibility_disapprove_test.php b/tests/functional/visibility_disapprove_test.php
index f853491414..95b371ac4f 100644
--- a/tests/functional/visibility_disapprove_test.php
+++ b/tests/functional/visibility_disapprove_test.php
@@ -243,8 +243,6 @@ class phpbb_functional_visibility_disapprove_test extends phpbb_functional_test_
 
 	protected function assert_forum_details($forum_id, $details, $additional_error_message = '')
 	{
-		$this->db = $this->get_db();
-
 		$sql = 'SELECT ' . implode(', ', array_keys($details)) . '
 			FROM phpbb_forums
 			WHERE forum_id = ' . (int) $forum_id;
@@ -257,8 +255,6 @@ class phpbb_functional_visibility_disapprove_test extends phpbb_functional_test_
 
 	protected function load_ids($data)
 	{
-		$this->db = $this->get_db();
-
 		if (!empty($data['forums']))
 		{
 			$sql = 'SELECT *
diff --git a/tests/functional/visibility_reapprove_test.php b/tests/functional/visibility_reapprove_test.php
index c9da0942b4..af0f553c0a 100644
--- a/tests/functional/visibility_reapprove_test.php
+++ b/tests/functional/visibility_reapprove_test.php
@@ -339,8 +339,6 @@ class phpbb_functional_visibility_reapprove_test extends phpbb_functional_test_c
 
 	protected function assert_forum_details($forum_id, $details, $additional_error_message = '')
 	{
-		$this->db = $this->get_db();
-
 		$sql = 'SELECT ' . implode(', ', array_keys($details)) . '
 			FROM phpbb_forums
 			WHERE forum_id = ' . (int) $forum_id;
@@ -353,8 +351,6 @@ class phpbb_functional_visibility_reapprove_test extends phpbb_functional_test_c
 
 	protected function load_ids($data)
 	{
-		$this->db = $this->get_db();
-
 		if (!empty($data['forums']))
 		{
 			$sql = 'SELECT *
diff --git a/tests/functional/visibility_softdelete_test.php b/tests/functional/visibility_softdelete_test.php
index 0275ea42ca..9e8d29ab62 100644
--- a/tests/functional/visibility_softdelete_test.php
+++ b/tests/functional/visibility_softdelete_test.php
@@ -783,8 +783,6 @@ class phpbb_functional_visibility_softdelete_test extends phpbb_functional_test_
 
 	public function assert_forum_details($forum_id, $details, $additional_error_message = '')
 	{
-		$this->db = $this->get_db();
-
 		$sql = 'SELECT ' . implode(', ', array_keys($details)) . '
 			FROM phpbb_forums
 			WHERE forum_id = ' . (int) $forum_id;
@@ -797,8 +795,6 @@ class phpbb_functional_visibility_softdelete_test extends phpbb_functional_test_
 
 	public function load_ids($data)
 	{
-		$this->db = $this->get_db();
-
 		if (!empty($data['forums']))
 		{
 			$sql = 'SELECT *
diff --git a/tests/functional/visibility_unapproved_posts_test.php b/tests/functional/visibility_unapproved_posts_test.php
index 7c14b10a90..2d01937981 100644
--- a/tests/functional/visibility_unapproved_posts_test.php
+++ b/tests/functional/visibility_unapproved_posts_test.php
@@ -256,8 +256,6 @@ class phpbb_functional_visibility_unapproved_posts_test extends phpbb_functional
 
 	protected function assert_forum_details($forum_id, $details, $additional_error_message = '')
 	{
-		$this->db = $this->get_db();
-
 		$sql = 'SELECT ' . implode(', ', array_keys($details)) . '
 			FROM phpbb_forums
 			WHERE forum_id = ' . (int) $forum_id;
@@ -270,8 +268,6 @@ class phpbb_functional_visibility_unapproved_posts_test extends phpbb_functional
 
 	protected function load_ids($data)
 	{
-		$this->db = $this->get_db();
-
 		if (!empty($data['forums']))
 		{
 			$sql = 'SELECT forum_id, forum_name
diff --git a/tests/test_framework/phpbb_functional_test_case.php b/tests/test_framework/phpbb_functional_test_case.php
index 5b3ec5c667..980f397a2a 100644
--- a/tests/test_framework/phpbb_functional_test_case.php
+++ b/tests/test_framework/phpbb_functional_test_case.php
@@ -30,7 +30,6 @@ class phpbb_functional_test_case extends phpbb_test_case
 	protected static $install_success = false;
 
 	protected $cache = null;
-	protected $db = null;
 	protected $db_doctrine = null;
 	protected $extension_manager = null;
 
@@ -38,20 +37,39 @@ class phpbb_functional_test_case extends phpbb_test_case
 	* Session ID for current test's session (each test makes its own)
 	* @var string
 	*/
-	protected $sid;
+	protected static $session_id;
 
 	/**
 	* Language array used by phpBB
 	* @var array
 	*/
-	protected $lang = array();
+	protected static $lang_ary = [];
 
 	protected static $config = array();
 	protected static $already_installed = false;
-	protected static $tests_count = 0;
-	protected static $tests_number = 0;
+	protected static $db_connection = null;
 
-	static public function setUpBeforeClass(): void
+    public function __get($property)
+    {
+        if ($property === 'sid')
+		{
+            return self::$session_id ??= null;
+        }
+
+        if ($property === 'db')
+		{
+            return self::$db_connection ??= null;
+        }
+
+        if ($property === 'lang')
+		{
+            return self::$lang_ary;
+        }
+
+        return null;
+    }
+
+	public static function setUpBeforeClass(): void
 	{
 		parent::setUpBeforeClass();
 
@@ -76,11 +94,15 @@ class phpbb_functional_test_case extends phpbb_test_case
 			self::$already_installed = true;
 		}
 
-		self::$tests_number = self::$tests_count = count(array_filter(get_class_methods(static::class), function($val)
-			{
-				return str_starts_with($val, 'test_');
-			})
-		);
+		global $cache;
+		$cache = new phpbb_mock_null_cache;
+		self::get_db();
+
+		// Special flag for testing without possibility to run into lock scenario.
+		// Unset entry and add it back if lock behavior for posting should be tested.
+		// Unset ci_tests_no_lock_posting from config
+		$sql = 'INSERT INTO ' . CONFIG_TABLE . " (config_name, config_value) VALUES ('ci_tests_no_lock_posting', '1')";
+		self::$db_connection->sql_query($sql);
 	}
 
 	/**
@@ -116,52 +138,32 @@ class phpbb_functional_test_case extends phpbb_test_case
 
 		// Clear the language array so that things
 		// that were added in other tests are gone
-		$this->lang = array();
-		$this->add_lang('common');
-
-		$this->get_db();
-
-		// Special flag for testing without possibility to run into lock scenario.
-		// Unset entry and add it back if lock behavior for posting should be tested.
-		// Unset ci_tests_no_lock_posting from config
-		$this->db->sql_return_on_error(true);
-		$sql = 'INSERT INTO ' . CONFIG_TABLE . " (config_name, config_value) VALUES ('ci_tests_no_lock_posting', '1')";
-		$this->db->sql_query($sql);
-		$this->db->sql_return_on_error(false);
+		self::$lang_ary = [];
+		self::add_lang('common');
 
 		foreach (static::setup_extensions() as $extension)
 		{
-			$this->purge_cache();
-
-			$sql = 'SELECT ext_active
-				FROM ' . EXT_TABLE . "
-				WHERE ext_name = '" . $this->db->sql_escape($extension). "'";
-			$result = $this->db->sql_query($sql);
-			$status = (bool) $this->db->sql_fetchfield('ext_active');
-			$this->db->sql_freeresult($result);
-
-			if (!$status)
-			{
-				$this->install_ext($extension);
-			}
+			self::install_ext($extension);
 		}
 	}
 
-	protected function tearDown(): void
+	public static function tearDownAfterClass(): void
 	{
-		parent::tearDown();
+		parent::tearDownAfterClass();
 
-		self::$tests_count--;
+		global $cache;
+		$cache = new phpbb_mock_null_cache;
 
-		if (self::$tests_count === 0 && $this->db instanceof \phpbb\db\driver\driver_interface)
+		if (self::$db_connection instanceof \phpbb\db\driver\driver_interface)
 		{
 			// Unset ci_tests_no_lock_posting from config
 			$sql = 'DELETE FROM ' . CONFIG_TABLE . "
 			WHERE config_name = 'ci_tests_no_lock_posting'";
-			$this->db->sql_query($sql);
+			self::$db_connection->sql_query($sql);
 
 			// Close the database connections again this test
-			$this->db->sql_close();
+			self::$db_connection->sql_close();
+			self::$db_connection = null;
 		}
 	}
 
@@ -174,7 +176,7 @@ class phpbb_functional_test_case extends phpbb_test_case
 	* @param bool	$assert_response_html	Should we perform standard assertions for a normal html page
 	* @return Symfony\Component\DomCrawler\Crawler
 	*/
-	static public function request($method, $path, $form_data = array(), $assert_response_html = true)
+	public static function request($method, $path, $form_data = array(), $assert_response_html = true)
 	{
 		$crawler = self::$client->request($method, self::$root_url . $path, $form_data);
 
@@ -194,7 +196,7 @@ class phpbb_functional_test_case extends phpbb_test_case
 	* @param bool	$assert_response_html	Should we perform standard assertions for a normal html page
 	* @return Symfony\Component\DomCrawler\Crawler
 	*/
-	static public function submit(Symfony\Component\DomCrawler\Form $form, array $values = array(), $assert_response_html = true)
+	public static function submit(Symfony\Component\DomCrawler\Form $form, array $values = array(), $assert_response_html = true)
 	{
 		// Remove files from form if no file was submitted
 		// See: https://github.com/symfony/symfony/issues/49014
@@ -221,7 +223,7 @@ class phpbb_functional_test_case extends phpbb_test_case
 	*
 	* @return string HTML page
 	*/
-	static public function get_content()
+	public static function get_content()
 	{
 		return (string) self::$client->getResponse()->getContent();
 	}
@@ -236,17 +238,18 @@ class phpbb_functional_test_case extends phpbb_test_case
 	/**
 	 * @return \phpbb\db\driver\driver_interface
 	 */
-	protected function get_db()
+	protected static function get_db()
 	{
 		global $phpbb_root_path, $phpEx;
 		// so we don't reopen an open connection
-		if (!($this->db instanceof \phpbb\db\driver\driver_interface))
+		if (!(self::$db_connection instanceof \phpbb\db\driver\driver_interface))
 		{
 			$dbms = self::$config['dbms'];
-			$this->db = new $dbms();
-			$this->db->sql_connect(self::$config['dbhost'], self::$config['dbuser'], self::$config['dbpasswd'], self::$config['dbname'], self::$config['dbport'], true);
+			self::$db_connection = new $dbms();
+			self::$db_connection->sql_connect(self::$config['dbhost'], self::$config['dbuser'], self::$config['dbpasswd'], self::$config['dbname'], self::$config['dbport'], true);
 		}
-		return $this->db;
+
+		return self::$db_connection;
 	}
 
 	protected function get_db_doctrine()
@@ -608,58 +611,69 @@ class phpbb_functional_test_case extends phpbb_test_case
 		}
 	}
 
-	public function install_ext($extension)
+	public static function install_ext($extension)
 	{
-		$this->add_lang('acp/extensions');
+		self::get_db();
+		$sql = 'SELECT ext_active
+			FROM ' . EXT_TABLE . "
+			WHERE ext_name = '" . self::$db_connection->sql_escape($extension). "'";
+		$result = self::$db_connection->sql_query($sql);
+		$status = (bool) self::$db_connection->sql_fetchfield('ext_active');
+		self::$db_connection->sql_freeresult($result);
 
-		if ($this->get_logged_in_user())
+		if (!$status)
 		{
-			$this->logout();
-		}
-		$this->login();
-		$this->admin_login();
+			self::add_lang('acp/extensions');
 
-		$ext_path = str_replace('/', '%2F', $extension);
+			if (self::get_logged_in_user())
+			{
+				self::logout();
+			}
+			self::login();
+			self::admin_login();
 
-		$crawler = self::request('GET', 'adm/index.php?i=acp_extensions&mode=main&action=enable_pre&ext_name=' . $ext_path . '&sid=' . $this->sid);
-		$this->assertGreaterThan(1, $crawler->filter('div.main fieldset.submit-buttons input')->count());
+			$ext_path = str_replace('/', '%2F', $extension);
 
-		$form = $crawler->selectButton($this->lang('EXTENSION_ENABLE'))->form();
-		$crawler = self::submit($form);
+			$crawler = self::request('GET', 'adm/index.php?i=acp_extensions&mode=main&action=enable_pre&ext_name=' . $ext_path . '&sid=' . self::$session_id);
+			self::assertGreaterThan(1, $crawler->filter('div.main fieldset.submit-buttons input')->count());
 
-		$meta_refresh = $crawler->filter('meta[http-equiv="refresh"]');
+			$form = $crawler->selectButton(self::lang('EXTENSION_ENABLE'))->form();
+			$crawler = self::submit($form);
 
-		// Wait for extension to be fully enabled
-		while (count($meta_refresh))
-		{
-			preg_match('#url=.+/(adm+.+)#', $meta_refresh->attr('content'), $match);
-			$url = $match[1];
-			$crawler = self::request('POST', $url);
 			$meta_refresh = $crawler->filter('meta[http-equiv="refresh"]');
+
+			// Wait for extension to be fully enabled
+			while (count($meta_refresh))
+			{
+				preg_match('#url=.+/(adm+.+)#', $meta_refresh->attr('content'), $match);
+				$url = $match[1];
+				$crawler = self::request('POST', $url);
+				$meta_refresh = $crawler->filter('meta[http-equiv="refresh"]');
+			}
+
+			self::assertContainsLang('EXTENSION_ENABLE_SUCCESS', $crawler->filter('div.successbox')->text());
+
+			self::logout();
 		}
-
-		$this->assertContainsLang('EXTENSION_ENABLE_SUCCESS', $crawler->filter('div.successbox')->text());
-
-		$this->logout();
 	}
 
-	public function disable_ext($extension)
+	public static function disable_ext($extension)
 	{
-		$this->add_lang('acp/extensions');
+		self::add_lang('acp/extensions');
 
-		if ($this->get_logged_in_user())
+		if (self::get_logged_in_user())
 		{
-			$this->logout();
+			self::logout();
 		}
-		$this->login();
-		$this->admin_login();
+		self::login();
+		self::admin_login();
 
 		$ext_path = str_replace('/', '%2F', $extension);
 
-		$crawler = self::request('GET', 'adm/index.php?i=acp_extensions&mode=main&action=disable_pre&ext_name=' . $ext_path . '&sid=' . $this->sid);
-		$this->assertGreaterThan(1, $crawler->filter('div.main fieldset.submit-buttons input')->count());
+		$crawler = self::request('GET', 'adm/index.php?i=acp_extensions&mode=main&action=disable_pre&ext_name=' . $ext_path . '&sid=' . self::$session_id);
+		self::assertGreaterThan(1, $crawler->filter('div.main fieldset.submit-buttons input')->count());
 
-		$form = $crawler->selectButton($this->lang('EXTENSION_DISABLE'))->form();
+		$form = $crawler->selectButton(self::lang('EXTENSION_DISABLE'))->form();
 		$crawler = self::submit($form);
 
 		$meta_refresh = $crawler->filter('meta[http-equiv="refresh"]');
@@ -673,28 +687,28 @@ class phpbb_functional_test_case extends phpbb_test_case
 			$meta_refresh = $crawler->filter('meta[http-equiv="refresh"]');
 		}
 
-		$this->assertContainsLang('EXTENSION_DISABLE_SUCCESS', $crawler->filter('div.successbox')->text());
+		self::assertContainsLang('EXTENSION_DISABLE_SUCCESS', $crawler->filter('div.successbox')->text());
 
-		$this->logout();
+		self::logout();
 	}
 
-	public function delete_ext_data($extension)
+	public static function delete_ext_data($extension)
 	{
-		$this->add_lang('acp/extensions');
+		self::add_lang('acp/extensions');
 
-		if ($this->get_logged_in_user())
+		if (self::get_logged_in_user())
 		{
-			$this->logout();
+			self::logout();
 		}
-		$this->login();
-		$this->admin_login();
+		self::login();
+		self::admin_login();
 
 		$ext_path = str_replace('/', '%2F', $extension);
 
-		$crawler = self::request('GET', 'adm/index.php?i=acp_extensions&mode=main&action=delete_data_pre&ext_name=' . $ext_path . '&sid=' . $this->sid);
-		$this->assertGreaterThan(1, $crawler->filter('div.main fieldset.submit-buttons input')->count());
+		$crawler = self::request('GET', 'adm/index.php?i=acp_extensions&mode=main&action=delete_data_pre&ext_name=' . $ext_path . '&sid=' . self::$session_id);
+		self::assertGreaterThan(1, $crawler->filter('div.main fieldset.submit-buttons input')->count());
 
-		$form = $crawler->selectButton($this->lang('EXTENSION_DELETE_DATA'))->form();
+		$form = $crawler->selectButton(self::lang('EXTENSION_DELETE_DATA'))->form();
 		$crawler = self::submit($form);
 
 		$meta_refresh = $crawler->filter('meta[http-equiv="refresh"]');
@@ -708,15 +722,15 @@ class phpbb_functional_test_case extends phpbb_test_case
 			$meta_refresh = $crawler->filter('meta[http-equiv="refresh"]');
 		}
 
-		$this->assertContainsLang('EXTENSION_DELETE_DATA_SUCCESS', $crawler->filter('div.successbox')->text());
+		self::assertContainsLang('EXTENSION_DELETE_DATA_SUCCESS', $crawler->filter('div.successbox')->text());
 
-		$this->logout();
+		self::logout();
 	}
 
-	public function uninstall_ext($extension)
+	public static function uninstall_ext($extension)
 	{
-		$this->disable_ext($extension);
-		$this->delete_ext_data($extension);
+		self::disable_ext($extension);
+		self::delete_ext_data($extension);
 	}
 
 	private static function recreate_database($config)
@@ -904,7 +918,6 @@ class phpbb_functional_test_case extends phpbb_test_case
 	 */
 	protected function get_group_id($group_name)
 	{
-		$this->get_db();
 		$sql = 'SELECT group_id
 			FROM ' . GROUPS_TABLE . "
 			WHERE group_name = '" . $this->db->sql_escape($group_name) . "'";
@@ -1017,21 +1030,21 @@ class phpbb_functional_test_case extends phpbb_test_case
 		return group_user_add($group_id, false, $usernames, $group_name, $default, $leader);
 	}
 
-	protected function login($username = 'admin', $autologin = false)
+	protected static function login($username = 'admin', $autologin = false)
 	{
-		$this->add_lang('ucp');
+		self::add_lang('ucp');
 
 		$crawler = self::request('GET', 'ucp.php?mode=login');
-		$button = $crawler->selectButton($this->lang('LOGIN'));
-		$this->assertGreaterThan(0, $button->count(), 'No login button found');
+		$button = $crawler->selectButton(self::lang('LOGIN'));
+		self::assertGreaterThan(0, $button->count(), 'No login button found');
 
-		$form = $crawler->selectButton($this->lang('LOGIN'))->form();
+		$form = $crawler->selectButton(self::lang('LOGIN'))->form();
 		if ($autologin)
 		{
 			$form['autologin']->tick();
 		}
 		$crawler = self::submit($form, array('username' => $username, 'password' => $username . $username));
-		$this->assertStringNotContainsString($this->lang('LOGIN'), $crawler->filter('.navbar')->text());
+		self::assertStringNotContainsString(self::lang('LOGIN'), $crawler->filter('.navbar')->text());
 
 		$cookies = self::$cookieJar->all();
 
@@ -1040,50 +1053,50 @@ class phpbb_functional_test_case extends phpbb_test_case
 		{
 			if (substr($cookie->getName(), -4) == '_sid')
 			{
-				$this->sid = $cookie->getValue();
+				self::$session_id = $cookie->getValue();
 			}
 		}
 	}
 
-	protected function logout()
+	protected static function logout()
 	{
-		$this->add_lang('ucp');
+		self::add_lang('ucp');
 
 		$crawler = self::request('GET', 'index.php');
-		$logout_link = $crawler->filter('a[title="' . $this->lang('LOGOUT') . '"]')->attr('href');
+		$logout_link = $crawler->filter('a[title="' . self::lang('LOGOUT') . '"]')->attr('href');
 		self::request('GET', $logout_link);
 
 		$crawler = self::request('GET', $logout_link);
-		$this->assertStringContainsString($this->lang('REGISTER'), $crawler->filter('.navbar')->text());
-		unset($this->sid);
+		self::assertStringContainsString(self::lang('REGISTER'), $crawler->filter('.navbar')->text());
+		self::$session_id = null;
 	}
 
 	/**
 	* Login to the ACP
 	* You must run login() before calling this.
 	*/
-	protected function admin_login($username = 'admin')
+	protected static function admin_login($username = 'admin')
 	{
-		$this->add_lang('acp/common');
+		self::add_lang('acp/common');
 
 		// Requires login first!
-		if (empty($this->sid))
+		if (empty(self::$session_id))
 		{
-			$this->fail('$this->sid is empty. Make sure you call login() before admin_login()');
+			self::fail('$this->sid is empty. Make sure you call login() before admin_login()');
 			return;
 		}
 
-		$crawler = self::request('GET', 'adm/index.php?sid=' . $this->sid);
-		$this->assertStringContainsString($this->lang('LOGIN_ADMIN_CONFIRM'), $crawler->filter('html')->text());
+		$crawler = self::request('GET', 'adm/index.php?sid=' . self::$session_id);
+		self::assertStringContainsString(self::lang('LOGIN_ADMIN_CONFIRM'), $crawler->filter('html')->text());
 
-		$form = $crawler->selectButton($this->lang('LOGIN'))->form();
+		$form = $crawler->selectButton(self::lang('LOGIN'))->form();
 
 		foreach ($form->getValues() as $field => $value)
 		{
 			if (strpos($field, 'password_') === 0)
 			{
 				$crawler = self::submit($form, array('username' => $username, $field => $username . $username));
-				$this->assertStringContainsString($this->lang('ADMIN_PANEL'), $crawler->filter('h1')->text());
+				self::assertStringContainsString(self::lang('ADMIN_PANEL'), $crawler->filter('h1')->text());
 
 				$cookies = self::$cookieJar->all();
 
@@ -1092,7 +1105,7 @@ class phpbb_functional_test_case extends phpbb_test_case
 				{
 					if (substr($cookie->getName(), -4) == '_sid')
 					{
-						$this->sid = $cookie->getValue();
+						self::$session_id = $cookie->getValue();
 					}
 				}
 
@@ -1101,13 +1114,13 @@ class phpbb_functional_test_case extends phpbb_test_case
 		}
 	}
 
-	protected function add_lang($lang_file)
+	protected static function add_lang($lang_file)
 	{
 		if (is_array($lang_file))
 		{
 			foreach ($lang_file as $file)
 			{
-				$this->add_lang($file);
+				self::add_lang($file);
 			}
 
 			return;
@@ -1115,23 +1128,23 @@ class phpbb_functional_test_case extends phpbb_test_case
 
 		$lang_path = __DIR__ . "/../../phpBB/language/en/$lang_file.php";
 
-		$lang = array();
+		$lang = [];
 
 		if (file_exists($lang_path))
 		{
 			include($lang_path);
 		}
 
-		$this->lang = array_merge($this->lang, $lang);
+		self::$lang_ary = array_merge(self::$lang_ary, $lang);
 	}
 
-	protected function add_lang_ext($ext_name, $lang_file)
+	protected static function add_lang_ext($ext_name, $lang_file)
 	{
 		if (is_array($lang_file))
 		{
 			foreach ($lang_file as $file)
 			{
-				$this->add_lang_ext($ext_name, $file);
+				self::add_lang_ext($ext_name, $file);
 			}
 
 			return;
@@ -1139,27 +1152,27 @@ class phpbb_functional_test_case extends phpbb_test_case
 
 		$lang_path = __DIR__ . "/../../phpBB/ext/{$ext_name}/language/en/$lang_file.php";
 
-		$lang = array();
+		$lang = [];
 
 		if (file_exists($lang_path))
 		{
 			include($lang_path);
 		}
 
-		$this->lang = array_merge($this->lang, $lang);
+		self::$lang_ary = array_merge(self::$lang_ary, $lang);
 	}
 
-	protected function lang()
+	protected static function lang()
 	{
 		$args = func_get_args();
 		$key = $args[0];
 
-		if (empty($this->lang[$key]))
+		if (empty(self::$lang_ary[$key]))
 		{
 			throw new RuntimeException('Language key "' . $key . '" could not be found.');
 		}
 
-		$args[0] = $this->lang[$key];
+		$args[0] = self::$lang_ary[$key];
 
 		return call_user_func_array('sprintf', $args);
 	}
@@ -1171,9 +1184,9 @@ class phpbb_functional_test_case extends phpbb_test_case
 	 * @param string $haystack	Search this
 	 * @param string $message	Optional failure message
 	 */
-	public function assertContainsLang($needle, $haystack, $message = '')
+	public static function assertContainsLang($needle, $haystack, $message = '')
 	{
-		$this->assertStringContainsString(html_entity_decode($this->lang($needle), ENT_QUOTES), $haystack, $message);
+		self::assertStringContainsString(html_entity_decode(self::lang($needle), ENT_QUOTES), $haystack, $message);
 	}
 
 	/**
@@ -1183,9 +1196,9 @@ class phpbb_functional_test_case extends phpbb_test_case
 	* @param string $haystack	Search this
 	* @param string $message	Optional failure message
 	*/
-	public function assertNotContainsLang($needle, $haystack, $message = '')
+	public static function assertNotContainsLang($needle, $haystack, $message = '')
 	{
-		$this->assertStringNotContainsString(html_entity_decode($this->lang($needle), ENT_QUOTES), $haystack, $message);
+		self::assertStringNotContainsString(html_entity_decode(self::lang($needle), ENT_QUOTES), $haystack, $message);
 	}
 
 	/*
@@ -1196,7 +1209,7 @@ class phpbb_functional_test_case extends phpbb_test_case
 	* @param mixed $status_code		Expected status code, false to disable check
 	* @return null
 	*/
-	static public function assert_response_html($status_code = 200)
+	public static function assert_response_html($status_code = 200)
 	{
 		// Any output before the doc type means there was an error
 		$content = self::get_content();
@@ -1217,7 +1230,7 @@ class phpbb_functional_test_case extends phpbb_test_case
 	* @param mixed $status_code		Expected status code, false to disable check
 	* @return null
 	*/
-	static public function assert_response_xml($status_code = 200)
+	public static function assert_response_xml($status_code = 200)
 	{
 		// Any output before the xml opening means there was an error
 		$content = self::get_content();
@@ -1239,7 +1252,7 @@ class phpbb_functional_test_case extends phpbb_test_case
 	* @param int $status_code	Expected status code
 	* @return void
 	*/
-	static public function assert_response_status_code($status_code = 200)
+	public static function assert_response_status_code($status_code = 200)
 	{
 		if ($status_code != self::$client->getResponse()->getStatusCode() &&
 			preg_match('/^5[0-9]{2}/', self::$client->getResponse()->getStatusCode()))
@@ -1662,7 +1675,7 @@ class phpbb_functional_test_case extends phpbb_test_case
 	 *
 	 * @return string|bool username if logged in, false otherwise
 	 */
-	protected function get_logged_in_user()
+	protected static function get_logged_in_user()
 	{
 		$username_logged_in = false;
 		$crawler = self::request('GET', 'index.php');