test: Prepare files_external for PHPUnit10tests/noid/migrate-files-external-to-phpunit10

Signed-off-by: Joas Schilling <coding@schilljs.com>

36 files changed, 270 insertions, 345 deletions

diff --git a/apps/files_external/tests/Auth/AuthMechanismTest.php b/apps/files_external/tests/Auth/AuthMechanismTest.php
index 682d2e1326f..d6279ea4f1f 100644
--- a/apps/files_external/tests/Auth/AuthMechanismTest.php
+++ b/apps/files_external/tests/Auth/AuthMechanismTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2020-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -13,7 +15,7 @@ use OCA\Files_External\Lib\StorageConfig;
 class AuthMechanismTest extends \Test\TestCase {
 	public function testJsonSerialization(): void {
 		$mechanism = $this->getMockBuilder(AuthMechanism::class)
-			->setMethods(['jsonSerializeDefinition'])
+			->onlyMethods(['jsonSerializeDefinition'])
 			->getMock();
 		$mechanism->expects($this->once())
 			->method('jsonSerializeDefinition')
@@ -26,7 +28,7 @@ class AuthMechanismTest extends \Test\TestCase {
 		$this->assertEquals('scheme', $json['scheme']);
 	}
 
-	public function validateStorageProvider() {
+	public static function validateStorageProvider(): array {
 		return [
 			[true, 'scheme', true],
 			[false, 'scheme', false],
@@ -38,9 +40,9 @@ class AuthMechanismTest extends \Test\TestCase {
 	/**
 	 * @dataProvider validateStorageProvider
 	 */
-	public function testValidateStorage($expectedSuccess, $scheme, $definitionSuccess): void {
+	public function testValidateStorage(bool $expectedSuccess, string $scheme, bool $definitionSuccess): void {
 		$mechanism = $this->getMockBuilder(AuthMechanism::class)
-			->setMethods(['validateStorageDefinition'])
+			->onlyMethods(['validateStorageDefinition'])
 			->getMock();
 		$mechanism->expects($this->atMost(1))
 			->method('validateStorageDefinition')
@@ -48,16 +50,12 @@ class AuthMechanismTest extends \Test\TestCase {
 
 		$mechanism->setScheme($scheme);
 
-		$backend = $this->getMockBuilder(Backend::class)
-			->disableOriginalConstructor()
-			->getMock();
+		$backend = $this->createMock(Backend::class);
 		$backend->expects($this->once())
 			->method('getAuthSchemes')
 			->willReturn(['scheme' => true, 'foobar' => true]);
 
-		$storageConfig = $this->getMockBuilder(StorageConfig::class)
-			->disableOriginalConstructor()
-			->getMock();
+		$storageConfig = $this->createMock(StorageConfig::class);
 		$storageConfig->expects($this->once())
 			->method('getBackend')
 			->willReturn($backend);
diff --git a/apps/files_external/tests/Auth/Password/GlobalAuth.php b/apps/files_external/tests/Auth/Password/GlobalAuthTest.php
index 998db198b53..02f15cb76c4 100644
--- a/apps/files_external/tests/Auth/Password/GlobalAuth.php
+++ b/apps/files_external/tests/Auth/Password/GlobalAuthTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -8,26 +10,16 @@ namespace OCA\Files_External\Tests\Auth\Password;
 
 use OCA\Files_External\Lib\Auth\Password\GlobalAuth;
 use OCA\Files_External\Lib\InsufficientDataForMeaningfulAnswerException;
-use OCA\Files_external\Lib\StorageConfig;
+use OCA\Files_External\Lib\StorageConfig;
 use OCP\IL10N;
 use OCP\Security\ICredentialsManager;
+use PHPUnit\Framework\MockObject\MockObject;
 use Test\TestCase;
 
 class GlobalAuthTest extends TestCase {
-	/**
-	 * @var IL10N|\PHPUnit\Framework\MockObject\MockObject
-	 */
-	private $l10n;
-
-	/**
-	 * @var ICredentialsManager|\PHPUnit\Framework\MockObject\MockObject
-	 */
-	private $credentialsManager;
-
-	/**
-	 * @var GlobalAuth
-	 */
-	private $instance;
+	private IL10N&MockObject $l10n;
+	private ICredentialsManager&MockObject $credentialsManager;
+	private GlobalAuth $instance;
 
 	protected function setUp(): void {
 		parent::setUp();
@@ -37,7 +29,7 @@ class GlobalAuthTest extends TestCase {
 	}
 
 	private function getStorageConfig($type, $config = []) {
-		/** @var \OCA\Files_External\Lib\StorageConfig|\PHPUnit\Framework\MockObject\MockObject $storageConfig */
+		/** @var \OCA\Files_External\Lib\StorageConfig&MockObject $storageConfig */
 		$storageConfig = $this->createMock(StorageConfig::class);
 		$storageConfig->expects($this->any())
 			->method('getType')
diff --git a/apps/files_external/tests/Backend/BackendTest.php b/apps/files_external/tests/Backend/BackendTest.php
index 26aa5ebe6af..1e158654595 100644
--- a/apps/files_external/tests/Backend/BackendTest.php
+++ b/apps/files_external/tests/Backend/BackendTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -12,7 +14,7 @@ use OCA\Files_External\Lib\StorageConfig;
 class BackendTest extends \Test\TestCase {
 	public function testJsonSerialization(): void {
 		$backend = $this->getMockBuilder(Backend::class)
-			->setMethods(['jsonSerializeDefinition'])
+			->onlyMethods(['jsonSerializeDefinition'])
 			->getMock();
 		$backend->expects($this->once())
 			->method('jsonSerializeDefinition')
@@ -32,7 +34,7 @@ class BackendTest extends \Test\TestCase {
 		$this->assertContains('barauth', array_keys($json['authSchemes']));
 	}
 
-	public function validateStorageProvider() {
+	public static function validateStorageProvider(): array {
 		return [
 			[true, true],
 			[false, false],
@@ -42,9 +44,9 @@ class BackendTest extends \Test\TestCase {
 	/**
 	 * @dataProvider validateStorageProvider
 	 */
-	public function testValidateStorage($expectedSuccess, $definitionSuccess): void {
+	public function testValidateStorage(bool $expectedSuccess, bool $definitionSuccess): void {
 		$backend = $this->getMockBuilder(Backend::class)
-			->setMethods(['validateStorageDefinition'])
+			->onlyMethods(['validateStorageDefinition'])
 			->getMock();
 		$backend->expects($this->atMost(1))
 			->method('validateStorageDefinition')
diff --git a/apps/files_external/tests/Backend/LegacyBackendTest.php b/apps/files_external/tests/Backend/LegacyBackendTest.php
index cea46c1a0cd..147965e2499 100644
--- a/apps/files_external/tests/Backend/LegacyBackendTest.php
+++ b/apps/files_external/tests/Backend/LegacyBackendTest.php
@@ -6,6 +6,7 @@
  */
 namespace OCA\Files_External\Tests\Backend;
 
+use OCA\Files_External\Lib\Auth\Builtin;
 use OCA\Files_External\Lib\Backend\LegacyBackend;
 use OCA\Files_External\Lib\DefinitionParameter;
 use OCA\Files_External\Lib\MissingDependency;
@@ -15,18 +16,16 @@ class LegacyBackendTest extends \Test\TestCase {
 	/**
 	 * @return MissingDependency[]
 	 */
-	public static function checkDependencies() {
+	public static function checkDependencies(): array {
 		return [
 			(new MissingDependency('abc'))->setMessage('foobar')
 		];
 	}
 
 	public function testConstructor(): void {
-		$auth = $this->getMockBuilder('\OCA\Files_External\Lib\Auth\Builtin')
-			->disableOriginalConstructor()
-			->getMock();
+		$auth = $this->createMock(Builtin::class);
 
-		$class = '\OCA\Files_External\Tests\Backend\LegacyBackendTest';
+		$class = self::class;
 		$definition = [
 			'configuration' => [
 				'textfield' => 'Text field',
@@ -43,7 +42,7 @@ class LegacyBackendTest extends \Test\TestCase {
 
 		$backend = new LegacyBackend($class, $definition, $auth);
 
-		$this->assertEquals('\OCA\Files_External\Tests\Backend\LegacyBackendTest', $backend->getStorageClass());
+		$this->assertEquals(self::class, $backend->getStorageClass());
 		$this->assertEquals('Backend text', $backend->getText());
 		$this->assertEquals(123, $backend->getPriority());
 		$this->assertContains('foo/bar.js', $backend->getCustomJs());
@@ -74,11 +73,9 @@ class LegacyBackendTest extends \Test\TestCase {
 	}
 
 	public function testNoDependencies(): void {
-		$auth = $this->getMockBuilder('\OCA\Files_External\Lib\Auth\Builtin')
-			->disableOriginalConstructor()
-			->getMock();
+		$auth = $this->createMock(Builtin::class);
 
-		$class = '\OCA\Files_External\Tests\Backend\LegacyBackendTest';
+		$class = self::class;
 		$definition = [
 			'configuration' => [
 			],
diff --git a/apps/files_external/tests/Command/ApplicableTest.php b/apps/files_external/tests/Command/ApplicableTest.php
index 8854e4ad485..59db18a42de 100644
--- a/apps/files_external/tests/Command/ApplicableTest.php
+++ b/apps/files_external/tests/Command/ApplicableTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -9,12 +11,13 @@ namespace OCA\Files_External\Tests\Command;
 use OCA\Files_External\Command\Applicable;
 use OCP\IGroupManager;
 use OCP\IUserManager;
+use PHPUnit\Framework\MockObject\MockObject;
 
-class ApplicableTest extends CommandTest {
-	private function getInstance($storageService) {
-		/** @var IUserManager|\PHPUnit\Framework\MockObject\MockObject $userManager */
+class ApplicableTest extends CommandTestCase {
+	private function getInstance($storageService): Applicable {
+		/** @var IUserManager&MockObject $userManager */
 		$userManager = $this->createMock(IUserManager::class);
-		/** @var IGroupManager|\PHPUnit\Framework\MockObject\MockObject $groupManager */
+		/** @var IGroupManager&MockObject $groupManager */
 		$groupManager = $this->createMock(IGroupManager::class);
 
 		$userManager->expects($this->any())
diff --git a/apps/files_external/tests/Command/CommandTest.php b/apps/files_external/tests/Command/CommandTestCase.php
index ed991fd784d..47985b687cd 100644
--- a/apps/files_external/tests/Command/CommandTest.php
+++ b/apps/files_external/tests/Command/CommandTestCase.php
@@ -9,21 +9,20 @@ namespace OCA\Files_External\Tests\Command;
 use OCA\Files_External\Lib\StorageConfig;
 use OCA\Files_External\NotFoundException;
 use OCA\Files_External\Service\GlobalStoragesService;
+use PHPUnit\Framework\MockObject\MockObject;
 use Symfony\Component\Console\Command\Command;
 use Symfony\Component\Console\Input\ArrayInput;
 use Symfony\Component\Console\Input\Input;
 use Symfony\Component\Console\Output\BufferedOutput;
 use Test\TestCase;
 
-abstract class CommandTest extends TestCase {
+abstract class CommandTestCase extends TestCase {
 	/**
 	 * @param StorageConfig[] $mounts
-	 * @return GlobalStoragesService|\PHPUnit\Framework\MockObject\MockObject
+	 * @return GlobalStoragesService&MockObject
 	 */
 	protected function getGlobalStorageService(array $mounts = []) {
-		$mock = $this->getMockBuilder('OCA\Files_External\Service\GlobalStoragesService')
-			->disableOriginalConstructor()
-			->getMock();
+		$mock = $this->createMock(GlobalStoragesService::class);
 
 		$this->bindMounts($mock, $mounts);
 
@@ -31,10 +30,10 @@ abstract class CommandTest extends TestCase {
 	}
 
 	/**
-	 * @param \PHPUnit\Framework\MockObject\MockObject $mock
+	 * @param MockObject $mock
 	 * @param StorageConfig[] $mounts
 	 */
-	protected function bindMounts(\PHPUnit\Framework\MockObject\MockObject $mock, array $mounts) {
+	protected function bindMounts(MockObject $mock, array $mounts) {
 		$mock->expects($this->any())
 			->method('getStorage')
 			->willReturnCallback(function ($id) use ($mounts) {
@@ -70,7 +69,7 @@ abstract class CommandTest extends TestCase {
 		return $mount;
 	}
 
-	protected function getInput(Command $command, array $arguments = [], array $options = []) {
+	protected function getInput(Command $command, array $arguments = [], array $options = []): ArrayInput {
 		$input = new ArrayInput([]);
 		$input->bind($command->getDefinition());
 		foreach ($arguments as $key => $value) {
@@ -82,7 +81,7 @@ abstract class CommandTest extends TestCase {
 		return $input;
 	}
 
-	protected function executeCommand(Command $command, Input $input) {
+	protected function executeCommand(Command $command, Input $input): string {
 		$output = new BufferedOutput();
 		$this->invokePrivate($command, 'execute', [$input, $output]);
 		return $output->fetch();
diff --git a/apps/files_external/tests/Command/ListCommandTest.php b/apps/files_external/tests/Command/ListCommandTest.php
index bd4430b4116..5b84e500e3f 100644
--- a/apps/files_external/tests/Command/ListCommandTest.php
+++ b/apps/files_external/tests/Command/ListCommandTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -16,24 +18,20 @@ use OCA\Files_External\Service\GlobalStoragesService;
 use OCA\Files_External\Service\UserStoragesService;
 use OCP\Authentication\LoginCredentials\IStore;
 use OCP\IL10N;
-use OCP\ISession;
 use OCP\IUserManager;
 use OCP\IUserSession;
-use OCP\Security\ICrypto;
+use PHPUnit\Framework\MockObject\MockObject;
 use Symfony\Component\Console\Output\BufferedOutput;
 
-class ListCommandTest extends CommandTest {
-	/**
-	 * @return ListCommand|\PHPUnit\Framework\MockObject\MockObject
-	 */
-	private function getInstance() {
-		/** @var GlobalStoragesService|\PHPUnit\Framework\MockObject\MockObject $globalService */
+class ListCommandTest extends CommandTestCase {
+	private function getInstance(): ListCommand {
+		/** @var GlobalStoragesService&MockObject $globalService */
 		$globalService = $this->createMock(GlobalStoragesService::class);
-		/** @var UserStoragesService|\PHPUnit\Framework\MockObject\MockObject $userService */
+		/** @var UserStoragesService&MockObject $userService */
 		$userService = $this->createMock(UserStoragesService::class);
-		/** @var IUserManager|\PHPUnit\Framework\MockObject\MockObject $userManager */
+		/** @var IUserManager&MockObject $userManager */
 		$userManager = $this->createMock(IUserManager::class);
-		/** @var IUserSession|\PHPUnit\Framework\MockObject\MockObject $userSession */
+		/** @var IUserSession&MockObject $userSession */
 		$userSession = $this->createMock(IUserSession::class);
 
 		return new ListCommand($globalService, $userService, $userSession, $userManager);
@@ -41,8 +39,6 @@ class ListCommandTest extends CommandTest {
 
 	public function testListAuthIdentifier(): void {
 		$l10n = $this->createMock(IL10N::class);
-		$session = $this->createMock(ISession::class);
-		$crypto = $this->createMock(ICrypto::class);
 		$instance = $this->getInstance();
 		$mount1 = new StorageConfig();
 		$mount1->setAuthMechanism(new Password($l10n));
diff --git a/apps/files_external/tests/Config/UserPlaceholderHandlerTest.php b/apps/files_external/tests/Config/UserPlaceholderHandlerTest.php
index b3c7db9306f..c46d3ed5010 100644
--- a/apps/files_external/tests/Config/UserPlaceholderHandlerTest.php
+++ b/apps/files_external/tests/Config/UserPlaceholderHandlerTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2019 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
@@ -12,25 +14,15 @@ use OCP\IUserManager;
 use OCP\IUserSession;
 use OCP\Share\Exceptions\ShareNotFound;
 use OCP\Share\IManager;
+use PHPUnit\Framework\MockObject\MockObject;
 
 class UserPlaceholderHandlerTest extends \Test\TestCase {
-	/** @var IUser|\PHPUnit\Framework\MockObject\MockObject */
-	protected $user;
-
-	/** @var IUserSession|\PHPUnit\Framework\MockObject\MockObject */
-	protected $session;
-
-	/** @var IManager|\PHPUnit\Framework\MockObject\MockObject */
-	private $shareManager;
-
-	/** @var IRequest|\PHPUnit\Framework\MockObject\MockObject */
-	private $request;
-
-	/** @var IUserManager|\PHPUnit\Framework\MockObject\MockObject */
-	private $userManager;
-
-	/** @var UserPlaceholderHandler */
-	protected $handler;
+	protected IUser&MockObject $user;
+	protected IUserSession&MockObject $session;
+	protected IManager&MockObject $shareManager;
+	protected IRequest&MockObject $request;
+	protected IUserManager&MockObject $userManager;
+	protected UserPlaceholderHandler $handler;
 
 	protected function setUp(): void {
 		parent::setUp();
@@ -47,13 +39,13 @@ class UserPlaceholderHandlerTest extends \Test\TestCase {
 		$this->handler = new UserPlaceholderHandler($this->session, $this->shareManager, $this->request, $this->userManager);
 	}
 
-	protected function setUser() {
+	protected function setUser(): void {
 		$this->session->expects($this->any())
 			->method('getUser')
 			->willReturn($this->user);
 	}
 
-	public function optionProvider() {
+	public static function optionProvider(): array {
 		return [
 			['/foo/bar/$user/foobar', '/foo/bar/alice/foobar'],
 			[['/foo/bar/$user/foobar'], ['/foo/bar/alice/foobar']],
@@ -64,7 +56,7 @@ class UserPlaceholderHandlerTest extends \Test\TestCase {
 	/**
 	 * @dataProvider optionProvider
 	 */
-	public function testHandle($option, $expected): void {
+	public function testHandle(string|array $option, string|array $expected): void {
 		$this->setUser();
 		$this->assertSame($expected, $this->handler->handle($option));
 	}
@@ -72,7 +64,7 @@ class UserPlaceholderHandlerTest extends \Test\TestCase {
 	/**
 	 * @dataProvider optionProvider
 	 */
-	public function testHandleNoUser($option): void {
+	public function testHandleNoUser(string|array $option): void {
 		$this->shareManager->expects($this->once())
 			->method('getShareByToken')
 			->willThrowException(new ShareNotFound());
diff --git a/apps/files_external/tests/Controller/AjaxControllerTest.php b/apps/files_external/tests/Controller/AjaxControllerTest.php
index 005e6e9714c..b1ea7a2b1b1 100644
--- a/apps/files_external/tests/Controller/AjaxControllerTest.php
+++ b/apps/files_external/tests/Controller/AjaxControllerTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
@@ -14,32 +16,22 @@ use OCP\IL10N;
 use OCP\IRequest;
 use OCP\IUser;
 use OCP\IUserSession;
+use PHPUnit\Framework\MockObject\MockObject;
 use Test\TestCase;
 
 class AjaxControllerTest extends TestCase {
-	/** @var IRequest */
-	private $request;
-	/** @var RSA */
-	private $rsa;
-	/** @var GlobalAuth */
-	private $globalAuth;
-	/** @var IUserSession */
-	private $userSession;
-	/** @var IGroupManager */
-	private $groupManager;
-	/** @var AjaxController */
-	private $ajaxController;
-	/** @var IL10N */
-	private $l10n;
+	private IRequest&MockObject $request;
+	private RSA&MockObject $rsa;
+	private GlobalAuth&MockObject $globalAuth;
+	private IUserSession&MockObject $userSession;
+	private IGroupManager&MockObject $groupManager;
+	private IL10N&MockObject $l10n;
+	private AjaxController $ajaxController;
 
 	protected function setUp(): void {
 		$this->request = $this->createMock(IRequest::class);
-		$this->rsa = $this->getMockBuilder('\\OCA\\Files_External\\Lib\\Auth\\PublicKey\\RSA')
-			->disableOriginalConstructor()
-			->getMock();
-		$this->globalAuth = $this->getMockBuilder('\\OCA\\Files_External\\Lib\\Auth\\Password\GlobalAuth')
-			->disableOriginalConstructor()
-			->getMock();
+		$this->rsa = $this->createMock(RSA::class);
+		$this->globalAuth = $this->createMock(GlobalAuth::class);
 		$this->userSession = $this->createMock(IUserSession::class);
 		$this->groupManager = $this->createMock(IGroupManager::class);
 		$this->l10n = $this->createMock(IL10N::class);
diff --git a/apps/files_external/tests/Controller/GlobalStoragesControllerTest.php b/apps/files_external/tests/Controller/GlobalStoragesControllerTest.php
index 4c318951d1b..2edc3ea3efc 100644
--- a/apps/files_external/tests/Controller/GlobalStoragesControllerTest.php
+++ b/apps/files_external/tests/Controller/GlobalStoragesControllerTest.php
@@ -9,6 +9,7 @@ namespace OCA\Files_External\Tests\Controller;
 use OC\User\User;
 use OCA\Files_External\Controller\GlobalStoragesController;
 use OCA\Files_External\Service\BackendService;
+use OCA\Files_External\Service\GlobalStoragesService;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IConfig;
 use OCP\IGroupManager;
@@ -17,13 +18,11 @@ use OCP\IRequest;
 use OCP\IUserSession;
 use Psr\Log\LoggerInterface;
 
-class GlobalStoragesControllerTest extends StoragesControllerTest {
+class GlobalStoragesControllerTest extends StoragesControllerTestCase {
 	protected function setUp(): void {
 		parent::setUp();
 
-		$this->service = $this->getMockBuilder('\OCA\Files_External\Service\GlobalStoragesService')
-			->disableOriginalConstructor()
-			->getMock();
+		$this->service = $this->createMock(GlobalStoragesService::class);
 
 		$this->service->method('getVisibilityType')
 			->willReturn(BackendService::VISIBILITY_ADMIN);
@@ -31,7 +30,7 @@ class GlobalStoragesControllerTest extends StoragesControllerTest {
 		$this->controller = $this->createController(true);
 	}
 
-	private function createController($allowCreateLocal = true) {
+	private function createController(bool $allowCreateLocal = true): GlobalStoragesController {
 		$session = $this->createMock(IUserSession::class);
 		$session->method('getUser')
 			->willReturn(new User('test', null, $this->createMock(IEventDispatcher::class)));
diff --git a/apps/files_external/tests/Controller/StoragesControllerTest.php b/apps/files_external/tests/Controller/StoragesControllerTestCase.php
index 0d604ff2d47..bb29904ab0d 100644
--- a/apps/files_external/tests/Controller/StoragesControllerTest.php
+++ b/apps/files_external/tests/Controller/StoragesControllerTestCase.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -7,10 +9,12 @@
 namespace OCA\Files_External\Tests\Controller;
 
 use OCA\Files_External\Controller\GlobalStoragesController;
+use OCA\Files_External\Controller\UserStoragesController;
 use OCA\Files_External\Lib\Auth\AuthMechanism;
+use OCA\Files_External\Lib\Auth\NullMechanism;
 use OCA\Files_External\Lib\Backend\Backend;
+use OCA\Files_External\Lib\Backend\SMB;
 use OCA\Files_External\Lib\StorageConfig;
-
 use OCA\Files_External\MountConfig;
 use OCA\Files_External\NotFoundException;
 use OCA\Files_External\Service\GlobalStoragesService;
@@ -18,33 +22,25 @@ use OCA\Files_External\Service\UserStoragesService;
 use OCP\AppFramework\Http;
 use PHPUnit\Framework\MockObject\MockObject;
 
-abstract class StoragesControllerTest extends \Test\TestCase {
-
-	/**
-	 * @var GlobalStoragesController
-	 */
-	protected $controller;
-
-	/**
-	 * @var GlobalStoragesService|UserStoragesService|MockObject
-	 */
-	protected $service;
+abstract class StoragesControllerTestCase extends \Test\TestCase {
+	protected GlobalStoragesController|UserStoragesController $controller;
+	protected GlobalStoragesService|UserStoragesService|MockObject $service;
 
 	protected function setUp(): void {
+		parent::setUp();
 		MountConfig::$skipTest = true;
 	}
 
 	protected function tearDown(): void {
 		MountConfig::$skipTest = false;
+		parent::tearDown();
 	}
 
 	/**
-	 * @return \OCA\Files_External\Lib\Backend\Backend|MockObject
+	 * @return \OCA\Files_External\Lib\Backend\Backend&MockObject
 	 */
-	protected function getBackendMock($class = '\OCA\Files_External\Lib\Backend\SMB', $storageClass = '\OCA\Files_External\Lib\Storage\SMB') {
-		$backend = $this->getMockBuilder(Backend::class)
-			->disableOriginalConstructor()
-			->getMock();
+	protected function getBackendMock($class = SMB::class, $storageClass = \OCA\Files_External\Lib\Storage\SMB::class) {
+		$backend = $this->createMock(Backend::class);
 		$backend->method('getStorageClass')
 			->willReturn($storageClass);
 		$backend->method('getIdentifier')
@@ -57,10 +53,8 @@ abstract class StoragesControllerTest extends \Test\TestCase {
 	/**
 	 * @return AuthMechanism|MockObject
 	 */
-	protected function getAuthMechMock($scheme = 'null', $class = '\OCA\Files_External\Lib\Auth\NullMechanism') {
-		$authMech = $this->getMockBuilder(AuthMechanism::class)
-			->disableOriginalConstructor()
-			->getMock();
+	protected function getAuthMechMock($scheme = 'null', $class = NullMechanism::class) {
+		$authMech = $this->createMock(AuthMechanism::class);
 		$authMech->method('getScheme')
 			->willReturn($scheme);
 		$authMech->method('getIdentifier')
@@ -98,8 +92,8 @@ abstract class StoragesControllerTest extends \Test\TestCase {
 
 		$response = $this->controller->create(
 			'mount',
-			'\OCA\Files_External\Lib\Storage\SMB',
-			'\OCA\Files_External\Lib\Auth\NullMechanism',
+			\OCA\Files_External\Lib\Storage\SMB::class,
+			NullMechanism::class,
 			[],
 			[],
 			[],
@@ -130,7 +124,7 @@ abstract class StoragesControllerTest extends \Test\TestCase {
 		$response = $this->controller->create(
 			'mount',
 			'local',
-			'\OCA\Files_External\Lib\Auth\NullMechanism',
+			NullMechanism::class,
 			[],
 			[],
 			[],
@@ -170,8 +164,8 @@ abstract class StoragesControllerTest extends \Test\TestCase {
 		$response = $this->controller->update(
 			1,
 			'mount',
-			'\OCA\Files_External\Lib\Storage\SMB',
-			'\OCA\Files_External\Lib\Auth\NullMechanism',
+			\OCA\Files_External\Lib\Storage\SMB::class,
+			NullMechanism::class,
 			[],
 			[],
 			[],
@@ -184,7 +178,7 @@ abstract class StoragesControllerTest extends \Test\TestCase {
 		$this->assertEquals($storageConfig->jsonSerialize(), $data);
 	}
 
-	public function mountPointNamesProvider() {
+	public static function mountPointNamesProvider(): array {
 		return [
 			[''],
 			['/'],
@@ -212,8 +206,8 @@ abstract class StoragesControllerTest extends \Test\TestCase {
 
 		$response = $this->controller->create(
 			$mountPoint,
-			'\OCA\Files_External\Lib\Storage\SMB',
-			'\OCA\Files_External\Lib\Auth\NullMechanism',
+			\OCA\Files_External\Lib\Storage\SMB::class,
+			NullMechanism::class,
 			[],
 			[],
 			[],
@@ -226,8 +220,8 @@ abstract class StoragesControllerTest extends \Test\TestCase {
 		$response = $this->controller->update(
 			1,
 			$mountPoint,
-			'\OCA\Files_External\Lib\Storage\SMB',
-			'\OCA\Files_External\Lib\Auth\NullMechanism',
+			\OCA\Files_External\Lib\Storage\SMB::class,
+			NullMechanism::class,
 			[],
 			[],
 			[],
@@ -250,7 +244,7 @@ abstract class StoragesControllerTest extends \Test\TestCase {
 		$response = $this->controller->create(
 			'mount',
 			'\OC\Files\Storage\InvalidStorage',
-			'\OCA\Files_External\Lib\Auth\NullMechanism',
+			NullMechanism::class,
 			[],
 			[],
 			[],
@@ -264,7 +258,7 @@ abstract class StoragesControllerTest extends \Test\TestCase {
 			1,
 			'mount',
 			'\OC\Files\Storage\InvalidStorage',
-			'\OCA\Files_External\Lib\Auth\NullMechanism',
+			NullMechanism::class,
 			[],
 			[],
 			[],
@@ -303,8 +297,8 @@ abstract class StoragesControllerTest extends \Test\TestCase {
 		$response = $this->controller->update(
 			255,
 			'mount',
-			'\OCA\Files_External\Lib\Storage\SMB',
-			'\OCA\Files_External\Lib\Auth\NullMechanism',
+			\OCA\Files_External\Lib\Storage\SMB::class,
+			NullMechanism::class,
 			[],
 			[],
 			[],
@@ -354,7 +348,7 @@ abstract class StoragesControllerTest extends \Test\TestCase {
 		$this->assertEquals($expected, $response->getData());
 	}
 
-	public function validateStorageProvider() {
+	public static function validateStorageProvider(): array {
 		return [
 			[true, true, true],
 			[false, true, false],
@@ -366,7 +360,7 @@ abstract class StoragesControllerTest extends \Test\TestCase {
 	/**
 	 * @dataProvider validateStorageProvider
 	 */
-	public function testValidateStorage($backendValidate, $authMechValidate, $expectSuccess): void {
+	public function testValidateStorage(bool $backendValidate, bool $authMechValidate, bool $expectSuccess): void {
 		$backend = $this->getBackendMock();
 		$backend->method('validateStorage')
 			->willReturn($backendValidate);
@@ -401,8 +395,8 @@ abstract class StoragesControllerTest extends \Test\TestCase {
 
 		$response = $this->controller->create(
 			'mount',
-			'\OCA\Files_External\Lib\Storage\SMB',
-			'\OCA\Files_External\Lib\Auth\NullMechanism',
+			\OCA\Files_External\Lib\Storage\SMB::class,
+			NullMechanism::class,
 			[],
 			[],
 			[],
diff --git a/apps/files_external/tests/Controller/UserStoragesControllerTest.php b/apps/files_external/tests/Controller/UserStoragesControllerTest.php
index c15ded48ea7..3e8d89ec060 100644
--- a/apps/files_external/tests/Controller/UserStoragesControllerTest.php
+++ b/apps/files_external/tests/Controller/UserStoragesControllerTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2016-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -8,8 +10,10 @@ namespace OCA\Files_External\Tests\Controller;
 
 use OC\User\User;
 use OCA\Files_External\Controller\UserStoragesController;
+use OCA\Files_External\Lib\Storage\SMB;
 use OCA\Files_External\Lib\StorageConfig;
 use OCA\Files_External\Service\BackendService;
+use OCA\Files_External\Service\UserStoragesService;
 use OCP\AppFramework\Http;
 use OCP\EventDispatcher\IEventDispatcher;
 use OCP\IConfig;
@@ -19,18 +23,16 @@ use OCP\IRequest;
 use OCP\IUserSession;
 use Psr\Log\LoggerInterface;
 
-class UserStoragesControllerTest extends StoragesControllerTest {
+class UserStoragesControllerTest extends StoragesControllerTestCase {
 
 	/**
 	 * @var array
 	 */
-	private $oldAllowedBackends;
+	private array $oldAllowedBackends;
 
 	protected function setUp(): void {
 		parent::setUp();
-		$this->service = $this->getMockBuilder('\OCA\Files_External\Service\UserStoragesService')
-			->disableOriginalConstructor()
-			->getMock();
+		$this->service = $this->createMock(UserStoragesService::class);
 
 		$this->service->method('getVisibilityType')
 			->willReturn(BackendService::VISIBILITY_PERSONAL);
@@ -38,7 +40,7 @@ class UserStoragesControllerTest extends StoragesControllerTest {
 		$this->controller = $this->createController(true);
 	}
 
-	private function createController($allowCreateLocal = true) {
+	private function createController(bool $allowCreateLocal = true) {
 		$session = $this->createMock(IUserSession::class);
 		$session->method('getUser')
 			->willReturn(new User('test', null, $this->createMock(IEventDispatcher::class)));
@@ -88,7 +90,7 @@ class UserStoragesControllerTest extends StoragesControllerTest {
 
 		$response = $this->controller->create(
 			'mount',
-			'\OCA\Files_External\Lib\Storage\SMB',
+			SMB::class,
 			'\Auth\Mechanism',
 			[],
 			[],
@@ -102,7 +104,7 @@ class UserStoragesControllerTest extends StoragesControllerTest {
 		$response = $this->controller->update(
 			1,
 			'mount',
-			'\OCA\Files_External\Lib\Storage\SMB',
+			SMB::class,
 			'\Auth\Mechanism',
 			[],
 			[],
diff --git a/apps/files_external/tests/DefinitionParameterTest.php b/apps/files_external/tests/DefinitionParameterTest.php
index 3fc65eaf897..f39ba90c871 100644
--- a/apps/files_external/tests/DefinitionParameterTest.php
+++ b/apps/files_external/tests/DefinitionParameterTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -48,7 +50,7 @@ class DefinitionParameterTest extends \Test\TestCase {
 		], $param->jsonSerialize());
 	}
 
-	public function validateValueProvider() {
+	public static function validateValueProvider(): array {
 		return [
 			[Param::VALUE_TEXT, Param::FLAG_NONE, 'abc', true],
 			[Param::VALUE_TEXT, Param::FLAG_NONE, '', false],
diff --git a/apps/files_external/tests/FrontendDefinitionTraitTest.php b/apps/files_external/tests/FrontendDefinitionTraitTest.php
index bc5d88ff3f0..a01b772bded 100644
--- a/apps/files_external/tests/FrontendDefinitionTraitTest.php
+++ b/apps/files_external/tests/FrontendDefinitionTraitTest.php
@@ -16,7 +16,7 @@ class FrontendDefinitionTraitTest extends \Test\TestCase {
 			->getMock();
 		$param->method('getName')->willReturn('foo');
 
-		$trait = $this->getMockForTrait('\OCA\Files_External\Lib\FrontendDefinitionTrait');
+		$trait = $this->getMockForTrait(\OCA\Files_External\Lib\FrontendDefinitionTrait::class);
 		$trait->setText('test');
 		$trait->addParameters([$param]);
 		$trait->addCustomJs('foo/bar.js');
@@ -32,7 +32,7 @@ class FrontendDefinitionTraitTest extends \Test\TestCase {
 		$this->assertArrayHasKey('foo', $configuration);
 	}
 
-	public function validateStorageProvider() {
+	public static function validateStorageProvider(): array {
 		return [
 			[true, ['foo' => true, 'bar' => true, 'baz' => true]],
 			[false, ['foo' => true, 'bar' => false]]
@@ -42,7 +42,7 @@ class FrontendDefinitionTraitTest extends \Test\TestCase {
 	/**
 	 * @dataProvider validateStorageProvider
 	 */
-	public function testValidateStorage($expectedSuccess, $params): void {
+	public function testValidateStorage(bool $expectedSuccess, array $params): void {
 		$backendParams = [];
 		foreach ($params as $name => $valid) {
 			$param = $this->getMockBuilder(DefinitionParameter::class)
@@ -67,7 +67,7 @@ class FrontendDefinitionTraitTest extends \Test\TestCase {
 		$storageConfig->expects($this->any())
 			->method('setBackendOption');
 
-		$trait = $this->getMockForTrait('\OCA\Files_External\Lib\FrontendDefinitionTrait');
+		$trait = $this->getMockForTrait(\OCA\Files_External\Lib\FrontendDefinitionTrait::class);
 		$trait->setText('test');
 		$trait->addParameters($backendParams);
 
@@ -98,7 +98,7 @@ class FrontendDefinitionTraitTest extends \Test\TestCase {
 			->method('setBackendOption')
 			->with('param', 'foobar');
 
-		$trait = $this->getMockForTrait('\OCA\Files_External\Lib\FrontendDefinitionTrait');
+		$trait = $this->getMockForTrait(\OCA\Files_External\Lib\FrontendDefinitionTrait::class);
 		$trait->setText('test');
 		$trait->addParameter($param);
 
diff --git a/apps/files_external/tests/LegacyDependencyCheckPolyfillTest.php b/apps/files_external/tests/LegacyDependencyCheckPolyfillTest.php
index 5fcfe1dd1e6..b6a351d44c0 100644
--- a/apps/files_external/tests/LegacyDependencyCheckPolyfillTest.php
+++ b/apps/files_external/tests/LegacyDependencyCheckPolyfillTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -13,7 +15,7 @@ class LegacyDependencyCheckPolyfillTest extends \Test\TestCase {
 	/**
 	 * @return MissingDependency[]
 	 */
-	public static function checkDependencies() {
+	public static function checkDependencies(): array {
 		return [
 			(new MissingDependency('dependency'))->setMessage('missing dependency'),
 			(new MissingDependency('program'))->setMessage('cannot find program'),
@@ -21,10 +23,10 @@ class LegacyDependencyCheckPolyfillTest extends \Test\TestCase {
 	}
 
 	public function testCheckDependencies(): void {
-		$trait = $this->getMockForTrait('\OCA\Files_External\Lib\LegacyDependencyCheckPolyfill');
+		$trait = $this->getMockForTrait(\OCA\Files_External\Lib\LegacyDependencyCheckPolyfill::class);
 		$trait->expects($this->once())
 			->method('getStorageClass')
-			->willReturn('\OCA\Files_External\Tests\LegacyDependencyCheckPolyfillTest');
+			->willReturn(self::class);
 
 		$dependencies = $trait->checkDependencies();
 		$this->assertCount(2, $dependencies);
diff --git a/apps/files_external/tests/Listener/StorePasswordListenerTest.php b/apps/files_external/tests/Listener/StorePasswordListenerTest.php
index ec278f84331..04635b7dafd 100644
--- a/apps/files_external/tests/Listener/StorePasswordListenerTest.php
+++ b/apps/files_external/tests/Listener/StorePasswordListenerTest.php
@@ -22,15 +22,12 @@ use Test\TestCase;
  * @group DB
  */
 class StorePasswordListenerTest extends TestCase {
-	/** @var MockObject|IUser */
-	protected $mockedUser;
+	protected IUser&MockObject $mockedUser;
 
 	protected function setUp(): void {
 		parent::setUp();
 		$this->mockedUser = $this->createMock(IUser::class);
-		$this->mockedUser
-			->expects($this->any())
-			->method('getUID')
+		$this->mockedUser->method('getUID')
 			->willReturn('test');
 	}
 
diff --git a/apps/files_external/tests/OwnCloudFunctionsTest.php b/apps/files_external/tests/OwnCloudFunctionsTest.php
index 3488195d3e8..2890cad3ac1 100644
--- a/apps/files_external/tests/OwnCloudFunctionsTest.php
+++ b/apps/files_external/tests/OwnCloudFunctionsTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -16,7 +18,7 @@ use OCA\Files_External\Lib\Storage\OwnCloud;
  * @package OCA\Files_External\Tests
  */
 class OwnCloudFunctionsTest extends \Test\TestCase {
-	public function configUrlProvider() {
+	public static function configUrlProvider(): array {
 		return [
 			[
 				[
@@ -88,7 +90,7 @@ class OwnCloudFunctionsTest extends \Test\TestCase {
 	/**
 	 * @dataProvider configUrlProvider
 	 */
-	public function testConfig($config, $expectedUri): void {
+	public function testConfig(array $config, string $expectedUri): void {
 		$config['user'] = 'someuser';
 		$config['password'] = 'somepassword';
 		$instance = new OwnCloud($config);
diff --git a/apps/files_external/tests/PersonalMountTest.php b/apps/files_external/tests/PersonalMountTest.php
index b268d3b5142..618048c3335 100644
--- a/apps/files_external/tests/PersonalMountTest.php
+++ b/apps/files_external/tests/PersonalMountTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -8,6 +10,7 @@ namespace OCA\Files_External\Tests;
 
 use OC\Files\Mount\Manager;
 use OC\Files\SetupManagerFactory;
+use OC\Files\Storage\Storage;
 use OCA\Files_External\Lib\PersonalMount;
 use OCA\Files_External\Lib\StorageConfig;
 use OCA\Files_External\Service\UserStoragesService;
@@ -17,13 +20,9 @@ class PersonalMountTest extends TestCase {
 	public function testFindByStorageId(): void {
 		$storageConfig = $this->createMock(StorageConfig::class);
 		/** @var UserStoragesService $storageService */
-		$storageService = $this->getMockBuilder('\OCA\Files_External\Service\UserStoragesService')
-			->disableOriginalConstructor()
-			->getMock();
+		$storageService = $this->createMock(UserStoragesService::class);
 
-		$storage = $this->getMockBuilder('\OC\Files\Storage\Storage')
-			->disableOriginalConstructor()
-			->getMock();
+		$storage = $this->createMock(Storage::class);
 
 		$storage->expects($this->any())
 			->method('getId')
diff --git a/apps/files_external/tests/Service/BackendServiceTest.php b/apps/files_external/tests/Service/BackendServiceTest.php
index c3a77d81b67..1feefbc2b25 100644
--- a/apps/files_external/tests/Service/BackendServiceTest.php
+++ b/apps/files_external/tests/Service/BackendServiceTest.php
@@ -13,25 +13,20 @@ use OCA\Files_External\Lib\Config\IAuthMechanismProvider;
 use OCA\Files_External\Lib\Config\IBackendProvider;
 use OCA\Files_External\Service\BackendService;
 use OCP\IAppConfig;
+use PHPUnit\Framework\MockObject\MockObject;
 
 class BackendServiceTest extends \Test\TestCase {
-
-	/** @var IAppConfig|\PHPUnit\Framework\MockObject\MockObject */
-	protected $appConfig;
+	protected IAppConfig&MockObject $appConfig;
 
 	protected function setUp(): void {
 		$this->appConfig = $this->createMock(IAppConfig::class);
 	}
 
 	/**
-	 * @param string $class
-	 *
-	 * @return \OCA\Files_External\Lib\Backend\Backend|\PHPUnit\Framework\MockObject\MockObject
+	 * @return \OCA\Files_External\Lib\Backend\Backend&MockObject
 	 */
-	protected function getBackendMock($class) {
-		$backend = $this->getMockBuilder(Backend::class)
-			->disableOriginalConstructor()
-			->getMock();
+	protected function getBackendMock(string $class) {
+		$backend = $this->createMock(Backend::class);
 		$backend->method('getIdentifier')->willReturn('identifier:' . $class);
 		$backend->method('getIdentifierAliases')->willReturn(['identifier:' . $class]);
 		return $backend;
@@ -40,12 +35,10 @@ class BackendServiceTest extends \Test\TestCase {
 	/**
 	 * @param string $class
 	 *
-	 * @return AuthMechanism|\PHPUnit\Framework\MockObject\MockObject
+	 * @return AuthMechanism&MockObject
 	 */
 	protected function getAuthMechanismMock($class) {
-		$backend = $this->getMockBuilder(AuthMechanism::class)
-			->disableOriginalConstructor()
-			->getMock();
+		$backend = $this->createMock(AuthMechanism::class);
 		$backend->method('getIdentifier')->willReturn('identifier:' . $class);
 		$backend->method('getIdentifierAliases')->willReturn(['identifier:' . $class]);
 		return $backend;
@@ -56,10 +49,8 @@ class BackendServiceTest extends \Test\TestCase {
 
 		$backend = $this->getBackendMock('\Foo\Bar');
 
-		/** @var \OCA\Files_External\Lib\Backend\Backend|\PHPUnit\Framework\MockObject\MockObject $backendAlias */
-		$backendAlias = $this->getMockBuilder(Backend::class)
-			->disableOriginalConstructor()
-			->getMock();
+		/** @var \OCA\Files_External\Lib\Backend\Backend&MockObject $backendAlias */
+		$backendAlias = $this->createMock(Backend::class);
 		$backendAlias->method('getIdentifierAliases')
 			->willReturn(['identifier_real', 'identifier_alias']);
 		$backendAlias->method('getIdentifier')
@@ -85,7 +76,7 @@ class BackendServiceTest extends \Test\TestCase {
 		$backend1 = $this->getBackendMock('\Foo\Bar');
 		$backend2 = $this->getBackendMock('\Bar\Foo');
 
-		/** @var IBackendProvider|\PHPUnit\Framework\MockObject\MockObject $providerMock */
+		/** @var IBackendProvider&MockObject $providerMock */
 		$providerMock = $this->createMock(IBackendProvider::class);
 		$providerMock->expects($this->once())
 			->method('getBackends')
@@ -104,7 +95,7 @@ class BackendServiceTest extends \Test\TestCase {
 		$backend1 = $this->getAuthMechanismMock('\Foo\Bar');
 		$backend2 = $this->getAuthMechanismMock('\Bar\Foo');
 
-		/** @var IAuthMechanismProvider|\PHPUnit\Framework\MockObject\MockObject $providerMock */
+		/** @var IAuthMechanismProvider&MockObject $providerMock */
 		$providerMock = $this->createMock(IAuthMechanismProvider::class);
 		$providerMock->expects($this->once())
 			->method('getAuthMechanisms')
@@ -125,13 +116,13 @@ class BackendServiceTest extends \Test\TestCase {
 
 		$backend2 = $this->getBackendMock('\Dead\Beef');
 
-		/** @var IBackendProvider|\PHPUnit\Framework\MockObject\MockObject $provider1Mock */
+		/** @var IBackendProvider&MockObject $provider1Mock */
 		$provider1Mock = $this->createMock(IBackendProvider::class);
 		$provider1Mock->expects($this->once())
 			->method('getBackends')
 			->willReturn([$backend1a, $backend1b]);
 		$service->registerBackendProvider($provider1Mock);
-		/** @var IBackendProvider|\PHPUnit\Framework\MockObject\MockObject $provider2Mock */
+		/** @var IBackendProvider&MockObject $provider2Mock */
 		$provider2Mock = $this->createMock(IBackendProvider::class);
 		$provider2Mock->expects($this->once())
 			->method('getBackends')
@@ -202,7 +193,7 @@ class BackendServiceTest extends \Test\TestCase {
 		$this->assertArrayNotHasKey('identifier:\Backend\NotAvailable', $availableBackends);
 	}
 
-	public function invalidConfigPlaceholderProvider() {
+	public static function invalidConfigPlaceholderProvider(): array {
 		return [
 			[['@user']],
 			[['$user']],
diff --git a/apps/files_external/tests/Service/DBConfigServiceTest.php b/apps/files_external/tests/Service/DBConfigServiceTest.php
index 51051d6c9f2..c902aa28270 100644
--- a/apps/files_external/tests/Service/DBConfigServiceTest.php
+++ b/apps/files_external/tests/Service/DBConfigServiceTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -16,17 +18,10 @@ use Test\TestCase;
  * @group DB
  */
 class DBConfigServiceTest extends TestCase {
-	/**
-	 * @var DBConfigService
-	 */
-	private $dbConfig;
-
-	/**
-	 * @var IDBConnection
-	 */
-	private $connection;
+	private IDBConnection $connection;
+	private DBConfigService $dbConfig;
 
-	private $mounts = [];
+	private array $mounts = [];
 
 	protected function setUp(): void {
 		parent::setUp();
@@ -39,9 +34,10 @@ class DBConfigServiceTest extends TestCase {
 			$this->dbConfig->removeMount($mount);
 		}
 		$this->mounts = [];
+		parent::tearDown();
 	}
 
-	private function addMount($mountPoint, $storageBackend, $authBackend, $priority, $type) {
+	private function addMount(string $mountPoint, string $storageBackend, string $authBackend, int $priority, int $type) {
 		$id = $this->dbConfig->addMount($mountPoint, $storageBackend, $authBackend, $priority, $type);
 		$this->mounts[] = $id;
 		return $id;
diff --git a/apps/files_external/tests/Service/GlobalStoragesServiceTest.php b/apps/files_external/tests/Service/GlobalStoragesServiceTest.php
index b4907f7f00f..1a1754799dc 100644
--- a/apps/files_external/tests/Service/GlobalStoragesServiceTest.php
+++ b/apps/files_external/tests/Service/GlobalStoragesServiceTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -14,7 +16,7 @@ use OCA\Files_External\Service\GlobalStoragesService;
 /**
  * @group DB
  */
-class GlobalStoragesServiceTest extends StoragesServiceTest {
+class GlobalStoragesServiceTest extends StoragesServiceTestCase {
 	protected function setUp(): void {
 		parent::setUp();
 		$this->service = new GlobalStoragesService($this->backendService, $this->dbConfig, $this->mountCache, $this->eventDispatcher);
@@ -44,7 +46,7 @@ class GlobalStoragesServiceTest extends StoragesServiceTest {
 		]);
 	}
 
-	public function storageDataProvider() {
+	public static function storageDataProvider(): array {
 		return [
 			// all users
 			[
@@ -172,7 +174,7 @@ class GlobalStoragesServiceTest extends StoragesServiceTest {
 		$this->assertEquals(0, $newStorage->getStatus());
 	}
 
-	public function hooksAddStorageDataProvider() {
+	public static function hooksAddStorageDataProvider(): array {
 		return [
 			// applicable all
 			[
@@ -301,7 +303,7 @@ class GlobalStoragesServiceTest extends StoragesServiceTest {
 		}
 	}
 
-	public function hooksUpdateStorageDataProvider() {
+	public static function hooksUpdateStorageDataProvider(): array {
 		return [
 			[
 				// nothing to multiple users and groups
@@ -421,11 +423,12 @@ class GlobalStoragesServiceTest extends StoragesServiceTest {
 	 * @dataProvider hooksUpdateStorageDataProvider
 	 */
 	public function testHooksUpdateStorage(
-		$sourceApplicableUsers,
-		$sourceApplicableGroups,
-		$updatedApplicableUsers,
-		$updatedApplicableGroups,
-		$expectedCalls): void {
+		array $sourceApplicableUsers,
+		array $sourceApplicableGroups,
+		array $updatedApplicableUsers,
+		array $updatedApplicableGroups,
+		array $expectedCalls,
+	): void {
 		$storage = $this->makeTestStorageData();
 		$storage->setApplicableUsers($sourceApplicableUsers);
 		$storage->setApplicableGroups($sourceApplicableGroups);
@@ -532,7 +535,7 @@ class GlobalStoragesServiceTest extends StoragesServiceTest {
 		}
 	}
 
-	public function hooksDeleteStorageDataProvider() {
+	public static function hooksDeleteStorageDataProvider(): array {
 		return [
 			[
 				['user1', 'user2'],
@@ -580,9 +583,10 @@ class GlobalStoragesServiceTest extends StoragesServiceTest {
 	 * @dataProvider hooksDeleteStorageDataProvider
 	 */
 	public function testHooksDeleteStorage(
-		$sourceApplicableUsers,
-		$sourceApplicableGroups,
-		$expectedCalls): void {
+		array $sourceApplicableUsers,
+		array $sourceApplicableGroups,
+		array $expectedCalls,
+	): void {
 		$storage = $this->makeTestStorageData();
 		$storage->setApplicableUsers($sourceApplicableUsers);
 		$storage->setApplicableGroups($sourceApplicableGroups);
diff --git a/apps/files_external/tests/Service/StoragesServiceTest.php b/apps/files_external/tests/Service/StoragesServiceTestCase.php
index 8d24b98d6af..a5cffd45ec2 100644
--- a/apps/files_external/tests/Service/StoragesServiceTest.php
+++ b/apps/files_external/tests/Service/StoragesServiceTestCase.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -10,9 +12,10 @@ use OC\Files\Cache\Storage;
 use OC\Files\Filesystem;
 use OCA\Files_External\Lib\Auth\AuthMechanism;
 use OCA\Files_External\Lib\Auth\InvalidAuth;
+use OCA\Files_External\Lib\Auth\NullMechanism;
 use OCA\Files_External\Lib\Backend\Backend;
 use OCA\Files_External\Lib\Backend\InvalidBackend;
-
+use OCA\Files_External\Lib\Backend\SMB;
 use OCA\Files_External\Lib\StorageConfig;
 use OCA\Files_External\MountConfig;
 use OCA\Files_External\NotFoundException;
@@ -31,9 +34,10 @@ use OCP\IUser;
 use OCP\Security\ICrypto;
 use OCP\Server;
 use OCP\Util;
+use PHPUnit\Framework\MockObject\MockObject;
 
 class CleaningDBConfig extends DBConfigService {
-	private $mountIds = [];
+	private array $mountIds = [];
 
 	public function addMount($mountPoint, $storageBackend, $authBackend, $priority, $type) {
 		$id = parent::addMount($mountPoint, $storageBackend, $authBackend, $priority, $type); // TODO: Change the autogenerated stub
@@ -51,41 +55,14 @@ class CleaningDBConfig extends DBConfigService {
 /**
  * @group DB
  */
-abstract class StoragesServiceTest extends \Test\TestCase {
-	/**
-	 * @var StoragesService
-	 */
-	protected $service;
-
-	/** @var BackendService */
-	protected $backendService;
-
-	/**
-	 * Data directory
-	 *
-	 * @var string
-	 */
-	protected $dataDir;
-
-	/** @var CleaningDBConfig */
-	protected $dbConfig;
-
-	/**
-	 * Hook calls
-	 *
-	 * @var array
-	 */
-	protected static $hookCalls;
-
-	/**
-	 * @var \PHPUnit\Framework\MockObject\MockObject|IUserMountCache
-	 */
-	protected $mountCache;
-
-	/**
-	 * @var \PHPUnit\Framework\MockObject\MockObject|IEventDispatcher
-	 */
-	protected IEventDispatcher $eventDispatcher;
+abstract class StoragesServiceTestCase extends \Test\TestCase {
+	protected StoragesService $service;
+	protected BackendService $backendService;
+	protected string $dataDir;
+	protected CleaningDBConfig $dbConfig;
+	protected static array $hookCalls;
+	protected IUserMountCache&MockObject $mountCache;
+	protected IEventDispatcher&MockObject $eventDispatcher;
 
 	protected function setUp(): void {
 		parent::setUp();
@@ -102,10 +79,7 @@ abstract class StoragesServiceTest extends \Test\TestCase {
 		$this->eventDispatcher = $this->createMock(IEventDispatcher::class);
 
 		// prepare BackendService mock
-		$this->backendService =
-			$this->getMockBuilder('\OCA\Files_External\Service\BackendService')
-				->disableOriginalConstructor()
-				->getMock();
+		$this->backendService = $this->createMock(BackendService::class);
 
 		$authMechanisms = [
 			'identifier:\Auth\Mechanism' => $this->getAuthMechMock('null', '\Auth\Mechanism'),
@@ -172,12 +146,11 @@ abstract class StoragesServiceTest extends \Test\TestCase {
 		if ($this->dbConfig) {
 			$this->dbConfig->clean();
 		}
+		parent::tearDown();
 	}
 
-	protected function getBackendMock($class = '\OCA\Files_External\Lib\Backend\SMB', $storageClass = '\OCA\Files_External\Lib\Storage\SMB') {
-		$backend = $this->getMockBuilder(Backend::class)
-			->disableOriginalConstructor()
-			->getMock();
+	protected function getBackendMock($class = SMB::class, $storageClass = \OCA\Files_External\Lib\Storage\SMB::class) {
+		$backend = $this->createMock(Backend::class);
 		$backend->method('getStorageClass')
 			->willReturn($storageClass);
 		$backend->method('getIdentifier')
@@ -185,10 +158,8 @@ abstract class StoragesServiceTest extends \Test\TestCase {
 		return $backend;
 	}
 
-	protected function getAuthMechMock($scheme = 'null', $class = '\OCA\Files_External\Lib\Auth\NullMechanism') {
-		$authMech = $this->getMockBuilder(AuthMechanism::class)
-			->disableOriginalConstructor()
-			->getMock();
+	protected function getAuthMechMock($scheme = 'null', $class = NullMechanism::class) {
+		$authMech = $this->createMock(AuthMechanism::class);
 		$authMech->method('getScheme')
 			->willReturn($scheme);
 		$authMech->method('getIdentifier')
@@ -199,12 +170,8 @@ abstract class StoragesServiceTest extends \Test\TestCase {
 
 	/**
 	 * Creates a StorageConfig instance based on array data
-	 *
-	 * @param array $data
-	 *
-	 * @return StorageConfig storage config instance
 	 */
-	protected function makeStorageConfig($data) {
+	protected function makeStorageConfig(array $data): StorageConfig {
 		$storage = new StorageConfig();
 		if (isset($data['id'])) {
 			$storage->setId($data['id']);
@@ -259,7 +226,7 @@ abstract class StoragesServiceTest extends \Test\TestCase {
 		$this->ActualNonExistingStorageTest();
 	}
 
-	public function deleteStorageDataProvider() {
+	public static function deleteStorageDataProvider(): array {
 		return [
 			// regular case, can properly delete the oc_storages entry
 			[
@@ -286,7 +253,7 @@ abstract class StoragesServiceTest extends \Test\TestCase {
 	/**
 	 * @dataProvider deleteStorageDataProvider
 	 */
-	public function testDeleteStorage($backendOptions, $rustyStorageId): void {
+	public function testDeleteStorage(array $backendOptions, string $rustyStorageId): void {
 		$backend = $this->backendService->getBackend('identifier:\OCA\Files_External\Lib\Backend\DAV');
 		$authMechanism = $this->backendService->getAuthMechanism('identifier:\Auth\Mechanism');
 		$storage = new StorageConfig(255);
@@ -463,14 +430,14 @@ abstract class StoragesServiceTest extends \Test\TestCase {
 		$this->assertEmpty($this->service->getStorages());
 	}
 
-	public static function createHookCallback($params) {
+	public static function createHookCallback($params): void {
 		self::$hookCalls[] = [
 			'signal' => Filesystem::signal_create_mount,
 			'params' => $params
 		];
 	}
 
-	public static function deleteHookCallback($params) {
+	public static function deleteHookCallback($params): void {
 		self::$hookCalls[] = [
 			'signal' => Filesystem::signal_delete_mount,
 			'params' => $params
diff --git a/apps/files_external/tests/Service/UserGlobalStoragesServiceTest.php b/apps/files_external/tests/Service/UserGlobalStoragesServiceTest.php
index e3c5cd486e9..1ec4e56bd9e 100644
--- a/apps/files_external/tests/Service/UserGlobalStoragesServiceTest.php
+++ b/apps/files_external/tests/Service/UserGlobalStoragesServiceTest.php
@@ -16,6 +16,7 @@ use OCP\IGroupManager;
 use OCP\IUser;
 use OCP\IUserSession;
 use OCP\Server;
+use PHPUnit\Framework\MockObject\MockObject;
 use Test\Traits\UserTrait;
 
 /**
@@ -24,20 +25,9 @@ use Test\Traits\UserTrait;
 class UserGlobalStoragesServiceTest extends GlobalStoragesServiceTest {
 	use UserTrait;
 
-	/** @var IGroupManager|\PHPUnit\Framework\MockObject\MockObject groupManager */
-	protected $groupManager;
-
-	/**
-	 * @var StoragesService
-	 */
-	protected $globalStoragesService;
-
-	/**
-	 * @var UserGlobalStoragesService
-	 */
-	protected $service;
-
-	protected $user;
+	protected IGroupManager&MockObject $groupManager;
+	protected StoragesService $globalStoragesService;
+	protected User $user;
 
 	public const USER_ID = 'test_user';
 	public const GROUP_ID = 'test_group';
@@ -49,7 +39,7 @@ class UserGlobalStoragesServiceTest extends GlobalStoragesServiceTest {
 		$this->globalStoragesService = $this->service;
 
 		$this->user = new User(self::USER_ID, null, Server::get(IEventDispatcher::class));
-		/** @var IUserSession|\PHPUnit\Framework\MockObject\MockObject $userSession */
+		/** @var IUserSession&MockObject $userSession */
 		$userSession = $this->createMock(IUserSession::class);
 		$userSession
 			->expects($this->any())
@@ -87,7 +77,7 @@ class UserGlobalStoragesServiceTest extends GlobalStoragesServiceTest {
 		);
 	}
 
-	public function applicableStorageProvider() {
+	public static function applicableStorageProvider(): array {
 		return [
 			[[], [], true],
 
@@ -211,7 +201,7 @@ class UserGlobalStoragesServiceTest extends GlobalStoragesServiceTest {
 		$this->actualDeletedUnexistingStorageTest();
 	}
 
-	public function getUniqueStoragesProvider() {
+	public static function getUniqueStoragesProvider(): array {
 		return [
 			// 'all' vs group
 			[100, [], [], 100, [], [self::GROUP_ID], 2],
diff --git a/apps/files_external/tests/Service/UserStoragesServiceTest.php b/apps/files_external/tests/Service/UserStoragesServiceTest.php
index a7b9f200417..53d7f5960e8 100644
--- a/apps/files_external/tests/Service/UserStoragesServiceTest.php
+++ b/apps/files_external/tests/Service/UserStoragesServiceTest.php
@@ -17,22 +17,19 @@ use OCA\Files_External\Service\UserStoragesService;
 use OCP\IUserManager;
 use OCP\IUserSession;
 use OCP\Server;
+use PHPUnit\Framework\MockObject\MockObject;
 use Test\Traits\UserTrait;
 
 /**
  * @group DB
  */
-class UserStoragesServiceTest extends StoragesServiceTest {
+class UserStoragesServiceTest extends StoragesServiceTestCase {
 	use UserTrait;
 
-	private $user;
+	protected \OC\User\User $user;
 
-	private $userId;
-
-	/**
-	 * @var StoragesService
-	 */
-	protected $globalStoragesService;
+	protected string $userId;
+	protected StoragesService $globalStoragesService;
 
 	protected function setUp(): void {
 		parent::setUp();
@@ -43,7 +40,7 @@ class UserStoragesServiceTest extends StoragesServiceTest {
 		$this->createUser($this->userId, $this->userId);
 		$this->user = Server::get(IUserManager::class)->get($this->userId);
 
-		/** @var IUserSession|\PHPUnit\Framework\MockObject\MockObject $userSession */
+		/** @var IUserSession&MockObject $userSession */
 		$userSession = $this->createMock(IUserSession::class);
 		$userSession
 			->expects($this->any())
diff --git a/apps/files_external/tests/Settings/AdminTest.php b/apps/files_external/tests/Settings/AdminTest.php
index aceb8d2e915..fd4a1949760 100644
--- a/apps/files_external/tests/Settings/AdminTest.php
+++ b/apps/files_external/tests/Settings/AdminTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
@@ -12,19 +14,15 @@ use OCA\Files_External\Service\GlobalStoragesService;
 use OCA\Files_External\Settings\Admin;
 use OCP\AppFramework\Http\TemplateResponse;
 use OCP\Encryption\IManager;
+use PHPUnit\Framework\MockObject\MockObject;
 use Test\TestCase;
 
 class AdminTest extends TestCase {
-	/** @var Admin */
-	private $admin;
-	/** @var IManager|\PHPUnit\Framework\MockObject\MockObject */
-	private $encryptionManager;
-	/** @var GlobalStoragesService|\PHPUnit\Framework\MockObject\MockObject */
-	private $globalStoragesService;
-	/** @var BackendService|\PHPUnit\Framework\MockObject\MockObject */
-	private $backendService;
-	/** @var GlobalAuth|\PHPUnit\Framework\MockObject\MockObject */
-	private $globalAuth;
+	private IManager&MockObject $encryptionManager;
+	private GlobalStoragesService&MockObject $globalStoragesService;
+	private BackendService&MockObject $backendService;
+	private GlobalAuth&MockObject $globalAuth;
+	private Admin $admin;
 
 	protected function setUp(): void {
 		parent::setUp();
diff --git a/apps/files_external/tests/Settings/SectionTest.php b/apps/files_external/tests/Settings/SectionTest.php
index 9154106ff8a..c64849ff7ba 100644
--- a/apps/files_external/tests/Settings/SectionTest.php
+++ b/apps/files_external/tests/Settings/SectionTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2016 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
@@ -8,20 +10,18 @@ namespace OCA\Files_External\Tests\Settings;
 use OCA\Files_External\Settings\Section;
 use OCP\IL10N;
 use OCP\IURLGenerator;
+use PHPUnit\Framework\MockObject\MockObject;
 use Test\TestCase;
 
 class SectionTest extends TestCase {
-	/** @var IL10N */
-	private $l;
-	/** @var IURLGenerator */
-	private $urlGenerator;
-	/** @var Section */
-	private $section;
+	private IL10N&MockObject $l;
+	private IURLGenerator&MockObject $urlGenerator;
+	private Section $section;
 
 	protected function setUp(): void {
 		parent::setUp();
-		$this->urlGenerator = $this->getMockBuilder(IURLGenerator::class)->disableOriginalConstructor()->getMock();
-		$this->l = $this->getMockBuilder(IL10N::class)->disableOriginalConstructor()->getMock();
+		$this->urlGenerator = $this->createMock(IURLGenerator::class);
+		$this->l = $this->createMock(IL10N::class);
 
 		$this->section = new Section(
 			$this->urlGenerator,
diff --git a/apps/files_external/tests/Storage/Amazons3MultiPartTest.php b/apps/files_external/tests/Storage/Amazons3MultiPartTest.php
index 1ac18406d24..641f00d5147 100644
--- a/apps/files_external/tests/Storage/Amazons3MultiPartTest.php
+++ b/apps/files_external/tests/Storage/Amazons3MultiPartTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2023 Nextcloud GmbH and Nextcloud contributors
  * SPDX-License-Identifier: AGPL-3.0-or-later
diff --git a/apps/files_external/tests/Storage/Amazons3Test.php b/apps/files_external/tests/Storage/Amazons3Test.php
index fd7fd9225c9..6d27b0b3253 100644
--- a/apps/files_external/tests/Storage/Amazons3Test.php
+++ b/apps/files_external/tests/Storage/Amazons3Test.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/tests/Storage/FtpTest.php b/apps/files_external/tests/Storage/FtpTest.php
index 81b92e0fae9..095a5236049 100644
--- a/apps/files_external/tests/Storage/FtpTest.php
+++ b/apps/files_external/tests/Storage/FtpTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/tests/Storage/OwncloudTest.php b/apps/files_external/tests/Storage/OwncloudTest.php
index 28041a665f8..ab6cd443dba 100644
--- a/apps/files_external/tests/Storage/OwncloudTest.php
+++ b/apps/files_external/tests/Storage/OwncloudTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/tests/Storage/SFTP_KeyTest.php b/apps/files_external/tests/Storage/SFTP_KeyTest.php
index 9be3cb7d3e8..17e2087f91b 100644
--- a/apps/files_external/tests/Storage/SFTP_KeyTest.php
+++ b/apps/files_external/tests/Storage/SFTP_KeyTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -40,7 +42,7 @@ class SFTP_KeyTest extends \Test\Files\Storage\Storage {
 		parent::tearDown();
 	}
 
-	
+
 	public function testInvalidAddressShouldThrowException(): void {
 		$this->expectException(\InvalidArgumentException::class);
 
@@ -52,24 +54,24 @@ class SFTP_KeyTest extends \Test\Files\Storage\Storage {
 		$this->assertTrue($this->instance->assertHostAddressValid('localhost'));
 	}
 
-	
+
 	public function testNegativePortNumberShouldThrowException(): void {
 		$this->expectException(\InvalidArgumentException::class);
 
 		$this->instance->assertPortNumberValid('-1');
 	}
 
-	
+
 	public function testNonNumericalPortNumberShouldThrowException(): void {
 		$this->expectException(\InvalidArgumentException::class);
 
 		$this->instance->assertPortNumberValid('a');
 	}
 
-	
+
 	public function testHighPortNumberShouldThrowException(): void {
 		$this->expectException(\InvalidArgumentException::class);
- 
+
 		$this->instance->assertPortNumberValid('65536');
 	}
 
diff --git a/apps/files_external/tests/Storage/SftpTest.php b/apps/files_external/tests/Storage/SftpTest.php
index cc29486f426..082f0d7c502 100644
--- a/apps/files_external/tests/Storage/SftpTest.php
+++ b/apps/files_external/tests/Storage/SftpTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2019-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -52,7 +54,7 @@ class SftpTest extends \Test\Files\Storage\Storage {
 		$this->assertEquals($expectedStorageId, $instance->getId());
 	}
 
-	public function configProvider() {
+	public static function configProvider(): array {
 		return [
 			[
 				// no root path
diff --git a/apps/files_external/tests/Storage/SmbTest.php b/apps/files_external/tests/Storage/SmbTest.php
index 51737d05dc6..afcb5c1034f 100644
--- a/apps/files_external/tests/Storage/SmbTest.php
+++ b/apps/files_external/tests/Storage/SmbTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/tests/Storage/SwiftTest.php b/apps/files_external/tests/Storage/SwiftTest.php
index c21c8c6f506..17037e76ee3 100644
--- a/apps/files_external/tests/Storage/SwiftTest.php
+++ b/apps/files_external/tests/Storage/SwiftTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2018-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/tests/Storage/WebdavTest.php b/apps/files_external/tests/Storage/WebdavTest.php
index f1d3415e91e..a8de178effd 100644
--- a/apps/files_external/tests/Storage/WebdavTest.php
+++ b/apps/files_external/tests/Storage/WebdavTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
diff --git a/apps/files_external/tests/StorageConfigTest.php b/apps/files_external/tests/StorageConfigTest.php
index b67d69a3ce7..b3024cb228c 100644
--- a/apps/files_external/tests/StorageConfigTest.php
+++ b/apps/files_external/tests/StorageConfigTest.php
@@ -1,4 +1,6 @@
 <?php
+
+declare(strict_types=1);
 /**
  * SPDX-FileCopyrightText: 2017-2024 Nextcloud GmbH and Nextcloud contributors
  * SPDX-FileCopyrightText: 2016 ownCloud, Inc.
@@ -13,12 +15,8 @@ use OCA\Files_External\Lib\StorageConfig;
 
 class StorageConfigTest extends \Test\TestCase {
 	public function testJsonSerialization(): void {
-		$backend = $this->getMockBuilder(Backend::class)
-			->disableOriginalConstructor()
-			->getMock();
-		$parameter = $this->getMockBuilder(DefinitionParameter::class)
-			->disableOriginalConstructor()
-			->getMock();
+		$backend = $this->createMock(Backend::class);
+		$parameter = $this->createMock(DefinitionParameter::class);
 		$parameter
 			->expects($this->once())
 			->method('getType')
@@ -30,9 +28,7 @@ class StorageConfigTest extends \Test\TestCase {
 		$backend->method('getIdentifier')
 			->willReturn('storage::identifier');
 
-		$authMech = $this->getMockBuilder(AuthMechanism::class)
-			->disableOriginalConstructor()
-			->getMock();
+		$authMech = $this->createMock(AuthMechanism::class);
 		$authMech->method('getIdentifier')
 			->willReturn('auth::identifier');