diff --git a/tests/lib/Search/Query/Utils/Stub/TestCriterion.php b/tests/lib/Search/Query/Utils/Stub/TestCriterion.php
index 8bd4112..5cfbeca 100644
--- a/tests/lib/Search/Query/Utils/Stub/TestCriterion.php
+++ b/tests/lib/Search/Query/Utils/Stub/TestCriterion.php
@@ -14,6 +14,7 @@ final class TestCriterion extends Criterion
 {
     public function __construct()
     {
+        // No implementation needed. Used for test purposes only.
     }
 
     public function getSpecifications(): array