diff --git a/phpBB/config/default/container/services_captcha.yml b/phpBB/config/default/container/services_captcha.yml
index d4f1ad863a..ea41fefe80 100644
--- a/phpBB/config/default/container/services_captcha.yml
+++ b/phpBB/config/default/container/services_captcha.yml
@@ -19,7 +19,11 @@ services:
         shared: false
         arguments:
             - '@config'
+            - '@dbal.conn'
+            - '@language'
+            - '@request'
             - '@template'
+            - '@user'
             - '%core.root_path%'
             - '%core.php_ext%'
         calls:
diff --git a/phpBB/phpbb/captcha/plugins/base.php b/phpBB/phpbb/captcha/plugins/base.php
index 1b02d63166..a30e679731 100644
--- a/phpBB/phpbb/captcha/plugins/base.php
+++ b/phpBB/phpbb/captcha/plugins/base.php
@@ -246,4 +246,11 @@ abstract class base implements plugin_interface
 		}
 		$this->db->sql_freeresult($result);
 	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	public function acp_page(mixed $id, mixed $module): void
+	{
+	}
 }
diff --git a/phpBB/phpbb/captcha/plugins/incomplete.php b/phpBB/phpbb/captcha/plugins/incomplete.php
index ec3376c0a5..07998a7125 100644
--- a/phpBB/phpbb/captcha/plugins/incomplete.php
+++ b/phpBB/phpbb/captcha/plugins/incomplete.php
@@ -14,25 +14,34 @@
 namespace phpbb\captcha\plugins;
 
 use phpbb\config\config;
-use phpbb\exception\runtime_exception;
+use phpbb\db\driver\driver_interface;
+use phpbb\language\language;
+use phpbb\request\request_interface;
 use phpbb\template\template;
+use phpbb\user;
 
-class incomplete extends captcha_abstract
+class incomplete extends base
 {
 	/**
 	 * Constructor for incomplete captcha
 	 *
 	 * @param config $config
+	 * @param driver_interface $db
+	 * @param language $language
+	 * @param request_interface $request
 	 * @param template $template
+	 * @param user $user
 	 * @param string $phpbb_root_path
 	 * @param string $phpEx
 	 */
-	public function __construct(protected config $config, protected template $template,
-								protected string $phpbb_root_path, protected string $phpEx)
-	{}
+	public function __construct(config $config, driver_interface $db, language $language, request_interface $request,
+								protected template $template, user $user, protected string $phpbb_root_path, protected string $phpEx)
+	{
+		parent::__construct($config, $db, $language, $request, $user);
+	}
 
 	/**
-	 * @return bool True if captcha is available, false if not
+	 * {@inheritDoc}
 	 */
 	public function is_available(): bool
 	{
@@ -40,70 +49,45 @@ class incomplete extends captcha_abstract
 	}
 
 	/**
-	 * Dummy implementation, not supported by this captcha
-	 *
-	 * @throws runtime_exception
-	 * @return void
+	 * {@inheritDoc}
 	 */
-	public function get_generator_class(): void
+	public function has_config(): bool
 	{
-		throw new runtime_exception('NO_GENERATOR_CLASS');
+		return false;
 	}
 
 	/**
-	 * Get CAPTCHA name language variable
-	 *
-	 * @return string Language variable
+	 * {@inheritDoc}
 	 */
-	public static function get_name(): string
+	public function get_name(): string
 	{
 		return 'CAPTCHA_INCOMPLETE';
 	}
 
 	/**
-	 * Init CAPTCHA
-	 *
-	 * @param int $type CAPTCHA type
-	 * @return void
+	 * {@inheritDoc}
 	 */
-	public function init($type)
+	public function set_name(string $name): void
 	{
 	}
 
 	/**
-	 * Execute demo
-	 *
-	 * @return void
+	 * {@inheritDoc}
 	 */
-	public function execute_demo()
+	public function init(confirm_type $type): void
 	{
 	}
 
 	/**
-	 * Execute CAPTCHA
-	 *
-	 * @return void
+	 * {@inheritDoc}
 	 */
-	public function execute()
-	{
-	}
-
-	/**
-	 * Get template data for demo
-	 *
-	 * @param int|string $id ACP module ID
-	 *
-	 * @return string Demo template file name
-	 */
-	public function get_demo_template($id): string
+	public function get_demo_template(): string
 	{
 		return '';
 	}
 
 	/**
-	 * Get template data for CAPTCHA
-	 *
-	 * @return string CAPTCHA template file name
+	 * {@inheritDoc}
 	 */
 	public function get_template(): string
 	{
@@ -118,9 +102,7 @@ class incomplete extends captcha_abstract
 	}
 
 	/**
-	 * Validate CAPTCHA
-	 *
-	 * @return false Incomplete CAPTCHA will never validate
+	 * {@inheritDoc}
 	 */
 	public function validate(): bool
 	{
@@ -128,12 +110,26 @@ class incomplete extends captcha_abstract
 	}
 
 	/**
-	 * Check whether CAPTCHA is solved
-	 *
-	 * @return false Incomplete CAPTCHA will never be solved
+	 * {@inheritDoc}
+	 */
+	public function get_error(): string
+	{
+		return '';
+	}
+
+	/**
+	 * {@inheritDoc}
 	 */
 	public function is_solved(): bool
 	{
 		return false;
 	}
+
+	/**
+	 * {@inheritDoc}
+	 */
+	public function get_attempt_count(): int
+	{
+		return 0;
+	}
 }
diff --git a/phpBB/phpbb/captcha/plugins/legacy_wrapper.php b/phpBB/phpbb/captcha/plugins/legacy_wrapper.php
index 600683194d..aaabddb48b 100644
--- a/phpBB/phpbb/captcha/plugins/legacy_wrapper.php
+++ b/phpBB/phpbb/captcha/plugins/legacy_wrapper.php
@@ -211,7 +211,7 @@ class legacy_wrapper implements plugin_interface
 	/**
 	 * {@inheritDoc}
 	 */
-	public function acp_page($id, $module): void
+	public function acp_page(mixed $id, mixed $module): void
 	{
 		if (method_exists($this->legacy_captcha, 'acp_page'))
 		{
diff --git a/phpBB/phpbb/captcha/plugins/plugin_interface.php b/phpBB/phpbb/captcha/plugins/plugin_interface.php
index f9dd9c6402..41483e45a5 100644
--- a/phpBB/phpbb/captcha/plugins/plugin_interface.php
+++ b/phpBB/phpbb/captcha/plugins/plugin_interface.php
@@ -122,5 +122,5 @@ interface plugin_interface
 	 * @param mixed $module ACP module name
 	 * @return void
 	 */
-	public function acp_page($id, $module): void;
+	public function acp_page(mixed $id, mixed $module): void;
 }
diff --git a/phpBB/phpbb/captcha/plugins/turnstile.php b/phpBB/phpbb/captcha/plugins/turnstile.php
index edd6832159..afd7a363b2 100644
--- a/phpBB/phpbb/captcha/plugins/turnstile.php
+++ b/phpBB/phpbb/captcha/plugins/turnstile.php
@@ -229,7 +229,7 @@ class turnstile extends base
 	/**
 	 * {@inheritDoc}
 	 */
-	public function acp_page($id, $module): void
+	public function acp_page(mixed $id, mixed $module): void
 	{
 		$captcha_vars = [
 			'captcha_turnstile_sitekey'			=> 'CAPTCHA_TURNSTILE_SITEKEY',
diff --git a/tests/captcha/incomplete_test.php b/tests/captcha/incomplete_test.php
index c1da2b6c48..4c5e7c6b27 100644
--- a/tests/captcha/incomplete_test.php
+++ b/tests/captcha/incomplete_test.php
@@ -11,11 +11,15 @@
  *
  */
 
+use phpbb\captcha\plugins\confirm_type;
 use phpbb\captcha\plugins\incomplete;
 use phpbb\config\config;
+use phpbb\language\language;
+use phpbb\request\request;
 use phpbb\template\template;
+use phpbb\user;
 
-class phpbb_captcha_incomplete_test extends phpbb_test_case
+class phpbb_captcha_incomplete_test extends phpbb_database_test_case
 {
 	protected config $config;
 
@@ -32,21 +36,34 @@ class phpbb_captcha_incomplete_test extends phpbb_test_case
 		$this->assigned_vars = array_merge($this->assigned_vars, $vars);
 	}
 
+	public function getDataSet()
+	{
+		return $this->createXMLDataSet(__DIR__ . '/../fixtures/empty.xml');
+	}
+
 	protected function setUp(): void
 	{
 		global $phpbb_root_path, $phpEx;
 
 		$this->config = new config([]);
 		$this->template = $this->getMockBuilder('\phpbb\template\twig\twig')
-			->setMethods(['assign_vars'])
+			->onlyMethods(['assign_vars'])
 			->disableOriginalConstructor()
 			->getMock();
 		$this->template->method('assign_vars')
 			->willReturnCallback([$this, 'assign_vars']);
+		$db = $this->new_dbal();
+		$language = $this->createMock(language::class);
+		$request = $this->createMock(request::class);
+		$user = $this->createMock(user::class);
 
 		$this->incomplete_captcha = new incomplete(
 			$this->config,
+			$db,
+			$language,
+			$request,
 			$this->template,
+			$user,
 			$phpbb_root_path,
 			$phpEx
 		);
@@ -57,29 +74,25 @@ class phpbb_captcha_incomplete_test extends phpbb_test_case
 		$this->assertTrue($this->incomplete_captcha->is_available());
 		$this->assertFalse($this->incomplete_captcha->is_solved());
 		$this->assertFalse($this->incomplete_captcha->validate());
-		$this->assertSame('CAPTCHA_INCOMPLETE', incomplete::get_name());
-		$this->incomplete_captcha->init(0);
-		$this->incomplete_captcha->execute();
-		$this->incomplete_captcha->execute_demo();
+		$this->assertFalse($this->incomplete_captcha->has_config());
+		$this->incomplete_captcha->set_name('foo');
+		$this->assertSame('CAPTCHA_INCOMPLETE', $this->incomplete_captcha->get_name());
+		$this->incomplete_captcha->init(confirm_type::UNDEFINED);
 		$this->assertEmpty($this->assigned_vars);
 		$this->assertEmpty($this->incomplete_captcha->get_demo_template(0));
-	}
-
-	public function test_get_generator_class(): void
-	{
-		$this->expectException(\phpbb\exception\runtime_exception::class);
-		$this->incomplete_captcha->get_generator_class();
+		$this->assertEmpty($this->incomplete_captcha->get_error());
+		$this->assertSame(0, $this->incomplete_captcha->get_attempt_count());
 	}
 
 	public function test_get_tempate(): void
 	{
-		$this->incomplete_captcha->init(CONFIRM_REG);
+		$this->incomplete_captcha->init(confirm_type::REGISTRATION);
 		$this->assertSame('captcha_incomplete.html', $this->incomplete_captcha->get_template());
 		$this->assertEquals('CONFIRM_INCOMPLETE', $this->assigned_vars['CONFIRM_LANG']);
 
 		$this->assigned_vars = [];
 
-		$this->incomplete_captcha->init(CONFIRM_POST);
+		$this->incomplete_captcha->init(confirm_type::POST);
 		$this->assertSame('captcha_incomplete.html', $this->incomplete_captcha->get_template());
 		$this->assertEquals('CONFIRM_INCOMPLETE', $this->assigned_vars['CONFIRM_LANG']);
 	}