diff --git a/apps/dav/tests/unit/CalDAV/WebcalCaching/ConnectionTest.php b/apps/dav/tests/unit/CalDAV/WebcalCaching/ConnectionTest.php
index de749aae3f870..20f61120af7e0 100644
--- a/apps/dav/tests/unit/CalDAV/WebcalCaching/ConnectionTest.php
+++ b/apps/dav/tests/unit/CalDAV/WebcalCaching/ConnectionTest.php
@@ -25,6 +25,7 @@ class ConnectionTest extends TestCase {
 	private IClientService|MockObject $clientService;
 	private IConfig|MockObject $config;
 	private LoggerInterface|MockObject $logger;
+	private Connection $connection;
 
 	public function setUp(): void {
 		$this->clientService = $this->createMock(IClientService::class);