diff --git a/tests/Api/Controller/FileControllerTest.php b/tests/Api/Controller/FileControllerTest.php
index e4986e991d..f33dd7e4f7 100644
--- a/tests/Api/Controller/FileControllerTest.php
+++ b/tests/Api/Controller/FileControllerTest.php
@@ -16,7 +16,7 @@ final class FileControllerTest extends ApiTestCase {
 	 * @runInSeparateProcess
 	 */
 	public function testValidateUsignUuidWithInvalidData() {
-		$this->mockAppConfig([]);
+		$this->getMockAppConfig([]);
 
 		$this->request
 			->withPath('/api/v1/file/validate/uuid/invalid')
diff --git a/tests/Unit/Handler/FooterHandlerTest.php b/tests/Unit/Handler/FooterHandlerTest.php
index e02d988e1c..cd73261e82 100644
--- a/tests/Unit/Handler/FooterHandlerTest.php
+++ b/tests/Unit/Handler/FooterHandlerTest.php
@@ -12,7 +12,7 @@
 use PHPUnit\Framework\MockObject\MockObject;
 
 final class FooterHandlerTest extends \OCA\Libresign\Tests\Unit\TestCase {
-	private IAppConfig|MockObject $appConfig;
+	private IAppConfig $appConfig;
 	private PdfParserService|MockObject $pdfParserService;
 	private IURLGenerator|MockObject $urlGenerator;
 	private IL10N|MockObject $l10n;
diff --git a/tests/Unit/Service/Install/SignSetupServiceTest.php b/tests/Unit/Service/Install/SignSetupServiceTest.php
index 64e53218d6..796d64b45b 100644
--- a/tests/Unit/Service/Install/SignSetupServiceTest.php
+++ b/tests/Unit/Service/Install/SignSetupServiceTest.php
@@ -26,8 +26,9 @@ final class SignSetupServiceTest extends \OCA\Libresign\Tests\Unit\TestCase {
 	private EnvironmentHelper|MockObject $environmentHelper;
 	private FileAccessHelper $fileAccessHelper;
 	private IConfig|MockObject $config;
-	private IAppConfig|MockObject $appConfig;
+	private IAppConfig $appConfig;
 	private IAppManager|MockObject $appManager;
+	private IAppDataFactory $appDataFactory;
 
 	public function setUp(): void {
 		$this->environmentHelper = $this->createMock(EnvironmentHelper::class);
@@ -200,9 +201,7 @@ public function testVerify(): void {
 		$this->assertJsonStringEqualsJsonString($expected, $actual);
 	}
 
-	/**
-	 * @dataProvider dataGetInstallPath
-	 */
+	#[DataProvider('dataGetInstallPath')]
 	public function testGetInstallPath(string $architecture, string $resource, string $distro, string $expected): void {
 		$this->appConfig->setValueString(Application::APP_ID, 'java_path', 'vfs://home/data/appdata_1/libresign/x86_64/linux/java/jdk-21.0.2+13-jre/bin/java');
 		$this->appConfig->setValueString(Application::APP_ID, 'jsignpdf_jar_path', 'vfs://home/data/appdata_1/libresign/x86_64/jsignpdf/jsignpdf-2.2.2/JSignPdf.jar');
diff --git a/tests/Unit/TestCase.php b/tests/Unit/TestCase.php
index e88c856ae9..336b4c07cf 100644
--- a/tests/Unit/TestCase.php
+++ b/tests/Unit/TestCase.php
@@ -23,11 +23,11 @@ class TestCase extends \Test\TestCase {
 	private signRequestMapper $signRequestMapper;
 	private array $users = [];
 
-	public function mockAppConfig($config) {
+	public function getMockAppConfig(): IAppConfig {
 		\OC::$server->registerParameter('appName', 'libresign');
 		$service = \OCP\Server::get(\OCP\IAppConfig::class);
 		if (!$service instanceof AppConfigOverwrite) {
-			\OC::$server->registerService(\OCP\IAppConfig::class, function () {
+			\OC::$server->registerService(\OCP\IAppConfig::class, function ():AppConfigOverwrite {
 				return new AppConfigOverwrite(
 					\OCP\Server::get(\OCP\IDBConnection::class),
 					\OCP\Server::get(\Psr\Log\LoggerInterface::class),
@@ -39,10 +39,10 @@ public function mockAppConfig($config) {
 		return $service;
 	}
 
-	public function mockConfig($config) {
-		$service = \OC::$server->get(\OCP\IConfig::class);
+	public function mockConfig($config):void {
+		$service = \OCP\Server::get(\OCP\IConfig::class);
 		if (!$service instanceof AllConfigOverwrite) {
-			\OC::$server->registerService(\OCP\IConfig::class, function () {
+			\OC::$server->registerService(\OCP\IConfig::class, function ():AllConfigOverwrite {
 				$configOverwrite = new ConfigOverwrite(\OC::$configDir);
 				$systemConfig = new SystemConfig($configOverwrite);
 				return new AllConfigOverwrite($systemConfig);
@@ -71,7 +71,7 @@ public function haveDependents(): bool {
 			if (!$docblock) {
 				return false;
 			}
-			if (preg_match('#@depends ' . $this->getName(false) . '\n#s', $docblock)) {
+			if (preg_match('#@depends ' . $this->name() . '\n#s', $docblock)) {
 				return true;
 			}
 		}
@@ -80,7 +80,7 @@ public function haveDependents(): bool {
 
 	public function iDependOnOthers(): bool {
 		$reflector = new \ReflectionClass(\get_class($this));
-		$docblock = $reflector->getMethod($this->getName(false))->getDocComment();
+		$docblock = $reflector->getMethod($this->name())->getDocComment();
 		if (!$docblock) {
 			return false;
 		}
@@ -137,12 +137,8 @@ private function cleanDatabase(): void {
 
 	/**
 	 * Create user
-	 *
-	 * @param string $username
-	 * @param string $password
-	 * @return \OC\User\User
 	 */
-	public function createAccount($username, $password, $groupName = 'testGroup') {
+	public function createAccount(string $username, string $password, string $groupName = 'testGroup'):\OC\User\User {
 		$this->users[] = $username;
 		$this->mockConfig([
 			'core' => [
@@ -172,7 +168,7 @@ public function markUserExists($username): void {
 		$this->users[] = $username;
 	}
 
-	public function deleteUsers() {
+	public function deleteUsers():void {
 		foreach ($this->users as $username) {
 			$this->deleteUserIfExists($username);
 		}