diff --git a/tests/src/Core/Config/Cache/PConfigCacheTest.php b/tests/src/Core/Config/Cache/PConfigCacheTest.php
index b8feec4b19..e0e100bbac 100644
--- a/tests/src/Core/Config/Cache/PConfigCacheTest.php
+++ b/tests/src/Core/Config/Cache/PConfigCacheTest.php
@@ -113,7 +113,7 @@ class PConfigCacheTest extends MockedTest
 	 */
 	public function testKeyDiffWithResult($data)
 	{
-		$configCache = new PConfigCache($data);
+		$configCache = new PConfigCache();
 
 		$diffConfig = [
 			'fakeCat' => [