diff --git a/rules-tests/TypeDeclaration/Rector/ClassMethod/AddParamTypeFromPropertyTypeRector/Source/ParentWithNumber.php b/rules-tests/TypeDeclaration/Rector/ClassMethod/AddParamTypeFromPropertyTypeRector/Source/ParentWithNumber.php
index a2b54fcc826..1df782eae72 100644
--- a/rules-tests/TypeDeclaration/Rector/ClassMethod/AddParamTypeFromPropertyTypeRector/Source/ParentWithNumber.php
+++ b/rules-tests/TypeDeclaration/Rector/ClassMethod/AddParamTypeFromPropertyTypeRector/Source/ParentWithNumber.php
@@ -2,7 +2,7 @@
 
 namespace Rector\Tests\TypeDeclaration\Rector\ClassMethod\AddParamTypeFromPropertyTypeRector\Source;
 
-class ParentWithNumber
+abstract class ParentWithNumber
 {
     protected string $number;