diff --git a/rules-tests/Transform/Rector/Class_/AddInterfaceByParentRector/config/configured_rule.php b/rules-tests/Transform/Rector/Class_/AddInterfaceByParentRector/config/configured_rule.php
index a9db765b121..30ee11e6b08 100644
--- a/rules-tests/Transform/Rector/Class_/AddInterfaceByParentRector/config/configured_rule.php
+++ b/rules-tests/Transform/Rector/Class_/AddInterfaceByParentRector/config/configured_rule.php
@@ -10,9 +10,7 @@
 return static function (ContainerConfigurator $containerConfigurator): void {
     $services = $containerConfigurator->services();
     $services->set(AddInterfaceByParentRector::class)
-        ->call('configure', [[
-            AddInterfaceByParentRector::INTERFACE_BY_PARENT => [
-                SomeParent::class => SomeInterface::class,
-            ],
-        ]]);
+        ->configure([
+            SomeParent::class => SomeInterface::class,
+        ]);
 };
diff --git a/rules/Transform/Rector/Class_/AddInterfaceByParentRector.php b/rules/Transform/Rector/Class_/AddInterfaceByParentRector.php
index ffafcc1da0c..fccfff35ba7 100644
--- a/rules/Transform/Rector/Class_/AddInterfaceByParentRector.php
+++ b/rules/Transform/Rector/Class_/AddInterfaceByParentRector.php
@@ -107,10 +107,11 @@ public function refactor(Node $node): ?Node
     public function configure(array $configuration): void
     {
         $interfaceByParent = $configuration[self::INTERFACE_BY_PARENT] ?? ($configuration ?: []);
+
+        Assert::isArray($interfaceByParent);
         Assert::allString(array_keys($interfaceByParent));
-        Assert::allIsArray($interfaceByParent);
+        Assert::allString($interfaceByParent);
 
-        /** @var array<string, string> $interfaceByParent */
         $this->interfaceByParent = $interfaceByParent;
     }
 }