diff --git a/tests/Unit/Service/Autoconfig/IspDbTest.php b/tests/Unit/Service/Autoconfig/IspDbTest.php
index 701e753107..ba89f94fa6 100644
--- a/tests/Unit/Service/Autoconfig/IspDbTest.php
+++ b/tests/Unit/Service/Autoconfig/IspDbTest.php
@@ -51,7 +51,8 @@ class IspDbTest extends TestCase {
 	/** @var LoggerInterface|MockObject */
 	private $logger;
 
-	private IspDb $ispDb;
+	/** @var IspDb */
+	private $ispDb;
 
 	protected function setUp(): void {
 		parent::setUp();