diff --git a/phpstan-baseline.neon b/phpstan-baseline.neon
index 6b32ef6f..a36374f6 100644
--- a/phpstan-baseline.neon
+++ b/phpstan-baseline.neon
@@ -30,12 +30,6 @@ parameters:
 			count: 1
 			path: src/Rules.php
 
-		-
-			message: '#^Class "Ergebnis\\PhpCsFixer\\Config\\Test\\EndToEnd\\RuleSet\\CustomTest" is not allowed to extend "Ergebnis\\PhpCsFixer\\Config\\Test\\EndToEnd\\RuleSet\\AbstractRuleSetTestCase"\.$#'
-			identifier: ergebnis.noExtends
-			count: 1
-			path: test/EndToEnd/RuleSet/CustomTest.php
-
 		-
 			message: '#^Parameter \#1 \$iterable of static method Ergebnis\\PhpCsFixer\\Config\\Fixers\:\:fromIterable\(\) expects iterable\<PhpCsFixer\\Fixer\\FixerInterface\>, array\<int, \(PhpCsFixer\\Fixer\\FixerInterface&PHPUnit\\Framework\\MockObject\\Stub\)\|stdClass\> given\.$#'
 			identifier: argument.type
diff --git a/phpstan.neon b/phpstan.neon
index 3039ec1b..48585aa1 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -2,6 +2,11 @@ includes:
 	- phpstan-baseline.neon
 
 parameters:
+	ergebnis:
+		noExtends:
+			classesAllowedToBeExtended:
+				- Ergebnis\PhpCsFixer\Config\Test\EndToEnd\RuleSet\AbstractRuleSetTestCase
+
 	inferPrivatePropertyTypeFromConstructor: true
 
 	level: max