diff --git a/phpBB/config/default/container/services_posting.yml b/phpBB/config/default/container/services_posting.yml
index f6ad5ba80f..aa1a3e1959 100644
--- a/phpBB/config/default/container/services_posting.yml
+++ b/phpBB/config/default/container/services_posting.yml
@@ -1,5 +1,5 @@
 services:
   post.helper:
-    class: phpbb\post\post_helper
+    class: phpbb\posting\post_helper
     arguments:
       - '@dbal.conn'
diff --git a/phpBB/phpbb/console/command/searchindex/create.php b/phpBB/phpbb/console/command/searchindex/create.php
index 9615bb4621..6652e38159 100644
--- a/phpBB/phpbb/console/command/searchindex/create.php
+++ b/phpBB/phpbb/console/command/searchindex/create.php
@@ -17,7 +17,7 @@ use phpbb\config\config;
 use phpbb\console\command\command;
 use phpbb\language\language;
 use phpbb\log\log;
-use phpbb\post\post_helper;
+use phpbb\posting\post_helper;
 use phpbb\search\exception\no_search_backend_found_exception;
 use phpbb\search\search_backend_factory;
 use phpbb\search\state_helper;
diff --git a/phpBB/phpbb/console/command/searchindex/delete.php b/phpBB/phpbb/console/command/searchindex/delete.php
index 56506c44b4..618bdce03d 100644
--- a/phpBB/phpbb/console/command/searchindex/delete.php
+++ b/phpBB/phpbb/console/command/searchindex/delete.php
@@ -17,7 +17,7 @@ use phpbb\config\config;
 use phpbb\console\command\command;
 use phpbb\language\language;
 use phpbb\log\log;
-use phpbb\post\post_helper;
+use phpbb\posting\post_helper;
 use phpbb\search\exception\no_search_backend_found_exception;
 use phpbb\search\search_backend_factory;
 use phpbb\search\state_helper;
diff --git a/phpBB/phpbb/post/post_helper.php b/phpBB/phpbb/posting/post_helper.php
similarity index 96%
rename from phpBB/phpbb/post/post_helper.php
rename to phpBB/phpbb/posting/post_helper.php
index a70d38fb1c..2fbba9688b 100644
--- a/phpBB/phpbb/post/post_helper.php
+++ b/phpBB/phpbb/posting/post_helper.php
@@ -11,7 +11,7 @@
  *
  */
 
-namespace phpbb\post;
+namespace phpbb\posting;
 
 use phpbb\db\driver\driver_interface;
 
diff --git a/tests/console/searchindex/base.php b/tests/console/searchindex/base.php
new file mode 100644
index 0000000000..15372a5582
--- /dev/null
+++ b/tests/console/searchindex/base.php
@@ -0,0 +1,74 @@
+<?php
+
+use phpbb\config\config;
+use phpbb\di\service_collection;
+use phpbb\language\language;
+use phpbb\log\log;
+use phpbb\posting\post_helper;
+use phpbb\search\search_backend_factory;
+use phpbb\search\state_helper;
+use phpbb\user;
+
+require_once __DIR__ . '/mock/search_backend_mock.php';
+
+class base extends phpbb_test_case
+{
+	/** @var config */
+	protected $config;
+
+	/** @var language */
+	protected $language;
+
+	/** @var log */
+	protected $log;
+
+	/** @var post_helper */
+	protected $post_helper;
+
+	/** @var user */
+	protected $user;
+
+	/** @var search_backend_factory */
+	protected $search_backend_factory;
+
+	/** @var state_helper */
+	protected $state_helper;
+
+	/** @var service_collection */
+	protected $search_backend_collection;
+
+	protected function setUp(): void
+	{
+		global $phpbb_root_path, $phpEx;
+
+		$this->config = new \phpbb\config\config([
+			'search_indexing_state' => [],
+			'search_type' => 'search_backend_mock'
+		]);
+
+		$lang_loader = new \phpbb\language\language_file_loader($phpbb_root_path, $phpEx);
+		$this->language = new \phpbb\language\language($lang_loader);
+
+		$this->log = $this->createMock('\phpbb\log\log');
+
+		$this->post_helper = $this->createMock('\phpbb\posting\post_helper');
+		$this->post_helper
+			->method('get_max_post_id')
+			->willReturn(1000);
+
+		$this->user = $this->createMock('\phpbb\user');
+
+		$phpbb_container = new phpbb_mock_container_builder();
+		$search_backend_mock = new search_backend_mock();
+		$this->search_backend_collection = new \phpbb\di\service_collection($phpbb_container);
+		$this->search_backend_collection->add('search_backend_mock');
+		$this->search_backend_collection->add_service_class('search_backend_mock', 'search_backend_mock');
+		$phpbb_container->set('search_backend_mock', $search_backend_mock);
+
+		$this->search_backend_factory = new search_backend_factory($this->config, $this->search_backend_collection);
+
+		$this->state_helper = new state_helper($this->config, $this->search_backend_factory);
+
+		parent::setUp();
+	}
+}
diff --git a/tests/console/searchindex/create_test.php b/tests/console/searchindex/create_test.php
new file mode 100644
index 0000000000..43178e8408
--- /dev/null
+++ b/tests/console/searchindex/create_test.php
@@ -0,0 +1,70 @@
+<?php
+
+use phpbb\console\command\searchindex\create;
+use Symfony\Component\Console\Application;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Tester\CommandTester;
+
+require_once __DIR__ . '/base.php';
+require_once __DIR__ . '/mock/search_backend_mock.php';
+
+class create_test extends base
+{
+	public function get_command_tester()
+	{
+		$application = new Application();
+		$application->add(new create(
+			$this->config,
+			$this->language,
+			$this->log,
+			$this->post_helper,
+			$this->search_backend_factory,
+			$this->state_helper,
+			$this->user
+		));
+
+		$command = $application->find('searchindex:create');
+
+		return new CommandTester($command);
+	}
+
+	public function test_create()
+	{
+		$command_tester = $this->get_command_tester();
+
+		$command_tester->execute([
+			'search-backend' => 'search_backend_mock',
+		]);
+
+		$this->assertEquals(Command::SUCCESS, $command_tester->getStatusCode());
+		$this->assertStringContainsString('CLI_SEARCHINDEX_CREATE_SUCCESS', $command_tester->getDisplay());
+	}
+
+	public function test_create_when_search_backend_dont_exist()
+	{
+		$command_tester = $this->get_command_tester();
+
+		$command_tester->execute([
+			'search-backend' => 'missing',
+		]);
+
+		$this->assertEquals(Command::FAILURE, $command_tester->getStatusCode());
+		$this->assertStringContainsString('CLI_SEARCHINDEX_BACKEND_NOT_FOUND', $command_tester->getDisplay());
+	}
+
+	public function test_create_when_action_in_progress()
+	{
+		$this->config['search_indexing_state'] = ['not', 'empty'];
+
+		$command_tester = $this->get_command_tester();
+
+		$command_tester->execute([
+			'search-backend' => 'search_backend_mock',
+		]);
+
+		$this->assertEquals(Command::FAILURE, $command_tester->getStatusCode());
+		$this->assertStringContainsString('CLI_SEARCHINDEX_ACTION_IN_PROGRESS', $command_tester->getDisplay());
+
+		$this->config['search_indexing_state'] = [];
+	}
+}
diff --git a/tests/console/searchindex/delete_test.php b/tests/console/searchindex/delete_test.php
new file mode 100644
index 0000000000..2e17a99e48
--- /dev/null
+++ b/tests/console/searchindex/delete_test.php
@@ -0,0 +1,70 @@
+<?php
+
+use phpbb\console\command\searchindex\delete;
+use Symfony\Component\Console\Application;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Tester\CommandTester;
+
+require_once __DIR__ . '/base.php';
+require_once __DIR__ . '/mock/search_backend_mock.php';
+
+class delete_test extends base
+{
+	public function get_command_tester()
+	{
+		$application = new Application();
+		$application->add(new delete(
+			$this->config,
+			$this->language,
+			$this->log,
+			$this->post_helper,
+			$this->search_backend_factory,
+			$this->state_helper,
+			$this->user
+		));
+
+		$command = $application->find('searchindex:delete');
+
+		return new CommandTester($command);
+	}
+
+	public function test_delete()
+	{
+		$command_tester = $this->get_command_tester();
+
+		$command_tester->execute([
+			'search-backend' => 'search_backend_mock',
+		]);
+
+		$this->assertEquals(Command::SUCCESS, $command_tester->getStatusCode());
+		$this->assertStringContainsString('CLI_SEARCHINDEX_DELETE_SUCCESS', $command_tester->getDisplay());
+	}
+
+	public function test_delete_when_search_backend_dont_exist()
+	{
+		$command_tester = $this->get_command_tester();
+
+		$command_tester->execute([
+			'search-backend' => 'missing',
+		]);
+
+		$this->assertEquals(Command::FAILURE, $command_tester->getStatusCode());
+		$this->assertStringContainsString('CLI_SEARCHINDEX_BACKEND_NOT_FOUND', $command_tester->getDisplay());
+	}
+
+	public function test_delete_when_action_in_progress()
+	{
+		$this->config['search_indexing_state'] = ['not', 'empty'];
+
+		$command_tester = $this->get_command_tester();
+
+		$command_tester->execute([
+			'search-backend' => 'search_backend_mock',
+		]);
+
+		$this->assertEquals(Command::FAILURE, $command_tester->getStatusCode());
+		$this->assertStringContainsString('CLI_SEARCHINDEX_ACTION_IN_PROGRESS', $command_tester->getDisplay());
+
+		$this->config['search_indexing_state'] = [];
+	}
+}
diff --git a/tests/console/searchindex/list_all_test.php b/tests/console/searchindex/list_all_test.php
new file mode 100644
index 0000000000..b2308b3806
--- /dev/null
+++ b/tests/console/searchindex/list_all_test.php
@@ -0,0 +1,38 @@
+<?php
+
+use phpbb\console\command\searchindex\list_all;
+use Symfony\Component\Console\Application;
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Tester\CommandTester;
+
+require_once __DIR__ . '/base.php';
+require_once __DIR__ . '/mock/search_backend_mock.php';
+
+class list_all_test extends base
+{
+	public function get_command_tester()
+	{
+		$application = new Application();
+		$application->add(new list_all(
+			$this->config,
+			$this->language,
+			$this->search_backend_collection,
+			$this->user
+		));
+
+		$command = $application->find('searchindex:list');
+
+		return new CommandTester($command);
+	}
+
+	public function test_list()
+	{
+		$command_tester = $this->get_command_tester();
+
+		$command_tester->execute([]);
+
+		$this->assertEquals(Command::SUCCESS, $command_tester->getStatusCode());
+		$this->assertStringContainsString('Mock search backend', $command_tester->getDisplay());
+		$this->assertStringContainsString('ACTIVE', $command_tester->getDisplay());
+	}
+}
diff --git a/tests/console/searchindex/mock/search_backend_mock.php b/tests/console/searchindex/mock/search_backend_mock.php
new file mode 100644
index 0000000000..0f2db43eaf
--- /dev/null
+++ b/tests/console/searchindex/mock/search_backend_mock.php
@@ -0,0 +1,105 @@
+<?php
+
+use phpbb\search\backend\search_backend_interface;
+
+class search_backend_mock implements search_backend_interface
+{
+	public $index_created = false;
+
+	public function get_name(): string
+	{
+		return 'Mock search backend';
+	}
+
+	public function is_available(): bool
+	{
+		return true;
+	}
+
+	public function init()
+	{
+		return false;
+	}
+
+	public function get_search_query(): string
+	{
+		return '';
+	}
+
+	public function get_common_words(): array
+	{
+		return [];
+	}
+
+	public function get_word_length()
+	{
+		return false;
+	}
+
+	public function split_keywords(string &$keywords, string $terms): bool
+	{
+		return false;
+	}
+
+	public function keyword_search(string $type, string $fields, string $terms, array $sort_by_sql, string $sort_key, string $sort_dir, string $sort_days, array $ex_fid_ary, string $post_visibility, int $topic_id, array $author_ary, string $author_name, array &$id_ary, int &$start, int $per_page)
+	{
+		return 0;
+	}
+
+	public function author_search(string $type, bool $firstpost_only, array $sort_by_sql, string $sort_key, string $sort_dir, string $sort_days, array $ex_fid_ary, string $post_visibility, int $topic_id, array $author_ary, string $author_name, array &$id_ary, int &$start, int $per_page)
+	{
+		return 0;
+	}
+
+	public function supports_phrase_search(): bool
+	{
+		return false;
+	}
+
+	public function index(string $mode, int $post_id, string &$message, string &$subject, int $poster_id, int $forum_id)
+	{
+		// Nothing
+	}
+
+	public function index_remove(array $post_ids, array $author_ids, array $forum_ids): void
+	{
+		// Nothing
+	}
+
+	public function tidy(): void
+	{
+		// Nothing
+	}
+
+	public function create_index(int &$post_counter = 0): ?array
+	{
+		$this->index_created = true;
+		return null;
+	}
+
+	public function delete_index(int &$post_counter = 0): ?array
+	{
+		$this->index_created = true;
+		return null;
+	}
+
+	public function index_created(): bool
+	{
+		return $this->index_created;
+	}
+
+	public function index_stats()
+	{
+		return [];
+	}
+
+	public function get_acp_options(): array
+	{
+		return [];
+	}
+
+	public function get_type(): string
+	{
+		return static::class;
+	}
+}