diff --git a/library/Mixins/ChainedValidator.php b/library/Mixins/ChainedValidator.php
index b336c0f48..b0778f3df 100644
--- a/library/Mixins/ChainedValidator.php
+++ b/library/Mixins/ChainedValidator.php
@@ -254,7 +254,7 @@ public function perfectSquare(): ChainedValidator;
 
     public function pesel(): ChainedValidator;
 
-    public function phone(): ChainedValidator;
+    public function phone(?string $countryCode = null): ChainedValidator;
 
     public function phpLabel(): ChainedValidator;
 
diff --git a/library/Mixins/StaticValidator.php b/library/Mixins/StaticValidator.php
index df4b7888a..0dd7cd386 100644
--- a/library/Mixins/StaticValidator.php
+++ b/library/Mixins/StaticValidator.php
@@ -256,7 +256,7 @@ public static function perfectSquare(): ChainedValidator;
 
     public static function pesel(): ChainedValidator;
 
-    public static function phone(): ChainedValidator;
+    public static function phone(?string $countryCode = null): ChainedValidator;
 
     public static function phpLabel(): ChainedValidator;
 
diff --git a/tests/integration/issue-1289.phpt b/tests/integration/issue-1289.phpt
index f135e0c9b..dd118c30f 100644
--- a/tests/integration/issue-1289.phpt
+++ b/tests/integration/issue-1289.phpt
@@ -6,7 +6,7 @@ declare(strict_types=1);
 use Respect\Validation\Rules\ArrayType;
 use Respect\Validation\Rules\BoolType;
 use Respect\Validation\Rules\Each;
-use Respect\Validation\Rules\Key;
+use Respect\Validation\Rules\KeyOptional;
 use Respect\Validation\Rules\OneOf;
 use Respect\Validation\Rules\StringType;
 use Respect\Validation\Rules\StringVal;
@@ -17,23 +17,20 @@ require 'vendor/autoload.php';
 $validator = Validator::create(
     new Each(
         Validator::create(
-            new Key(
+            new KeyOptional(
                 'default',
                 new OneOf(
                     new StringType(),
                     new BoolType()
-                ),
-                false
+                )
             ),
-            new Key(
+            new KeyOptional(
                 'description',
                 new StringVal(),
-                false
             ),
-            new Key(
+            new KeyOptional(
                 'children',
                 new ArrayType(),
-                false
             )
         )
     )
diff --git a/tests/integration/lib/helpers.php b/tests/integration/lib/helpers.php
index 08baefe30..d82c709f8 100644
--- a/tests/integration/lib/helpers.php
+++ b/tests/integration/lib/helpers.php
@@ -8,7 +8,7 @@
 declare(strict_types=1);
 
 use Respect\Validation\Exceptions\ValidatorException;
-use Respect\Validation\Validator;
+use Respect\Validation\Validatable;
 use Symfony\Component\VarExporter\VarExporter;
 
 use function Respect\Stringifier\stringify;
@@ -43,7 +43,7 @@ function exceptionFullMessage(callable $callable, string $fallbackMessage = 'No
     }
 }
 
-/** @param array<string, array{Validator, mixed, null|string|array<string, mixed>}> $scenarios */
+/** @param array<string, array{0: Validatable, 1: mixed, 2?:string|array<string, mixed>}> $scenarios */
 function run(array $scenarios): void
 {
     foreach ($scenarios as $description => $data) {
diff --git a/tests/integration/rules/allOf.phpt b/tests/integration/rules/allOf.phpt
index 9cddf4ac6..d236e527e 100644
--- a/tests/integration/rules/allOf.phpt
+++ b/tests/integration/rules/allOf.phpt
@@ -10,7 +10,7 @@ use Respect\Validation\Validator as v;
 run([
     'Two rules' => [v::allOf(v::intType(), v::negative()), '2'],
     'Wrapped by "not"' => [v::not(v::allOf(v::intType(), v::positive())), 3],
-    'Wrapping "not"' => [v::allOf(v::not(v::intType(), v::positive()), v::greaterThan(2)), 4],
+    'Wrapping "not"' => [v::allOf(v::not(v::intType()), v::greaterThan(2)), 4],
     'With a single template' => [v::allOf(v::stringType(), v::arrayType()), 5, 'This is a single template'],
     'With multiple templates' => [
         v::allOf(v::stringType(), v::uppercase()),