diff --git a/.github/workflows/mutation.yml b/.github/workflows/mutation.yml
index c7fccb9..a0eceb0 100644
--- a/.github/workflows/mutation.yml
+++ b/.github/workflows/mutation.yml
@@ -28,6 +28,6 @@ jobs:
       os: >-
         ['ubuntu-latest']
       php: >-
-        ['8.3']
+        ['8.4']
     secrets:
       STRYKER_DASHBOARD_API_KEY: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}
diff --git a/composer.json b/composer.json
index 8325685..d389032 100644
--- a/composer.json
+++ b/composer.json
@@ -46,6 +46,7 @@
     },
     "require-dev": {
         "friendsofphp/php-cs-fixer": "^3.93",
+        "httpsoft/http-message": "^1.1",
         "maglnet/composer-require-checker": "^4.7.1",
         "phpunit/phpunit": "^10.5.45",
         "rector/rector": "^2.0.11",
@@ -85,6 +86,7 @@
     "scripts": {
         "test": "phpunit --testdox --no-interaction",
         "test-watch": "phpunit-watcher watch",
-        "cs-fix": "php-cs-fixer fix"
+        "cs-fix": "php-cs-fixer fix",
+        "infection": "infection --threads=max"
     }
 }
diff --git a/tests/Attribute/Parameter/BodyTest.php b/tests/Attribute/Parameter/BodyTest.php
index eee0ed4..0a2874e 100644
--- a/tests/Attribute/Parameter/BodyTest.php
+++ b/tests/Attribute/Parameter/BodyTest.php
@@ -4,6 +4,7 @@
 
 namespace Yiisoft\Input\Http\Tests\Attribute\Parameter;
 
+use HttpSoft\Message\ServerRequest;
 use PHPUnit\Framework\TestCase;
 use Psr\Http\Message\ServerRequestInterface;
 use Yiisoft\Hydrator\AttributeHandling\Exception\UnexpectedAttributeException;
@@ -78,6 +79,23 @@ public function testNonExistPath(): void
         $this->assertSame('', $input->a);
     }
 
+    public function testNonExistPathReturnsFailResult(): void
+    {
+        $request = new ServerRequest(parsedBody: ['a' => 'one']);
+
+        $requestProvider = new RequestProvider();
+        $requestProvider->set($request);
+
+        $resolver = new BodyResolver($requestProvider);
+
+        $attribute = new Body('non-existing-key');
+        $context = TestHelper::createParameterAttributeResolveContext();
+
+        $result = $resolver->getParameterValue($attribute, $context);
+
+        $this->assertFalse($result->isResolved());
+    }
+
     public function testUnexpectedAttributeException(): void
     {
         $resolver = new BodyResolver($this->createMock(RequestProviderInterface::class));
diff --git a/tests/Attribute/Parameter/RequestTest.php b/tests/Attribute/Parameter/RequestTest.php
index 5cfcf35..19ab8c4 100644
--- a/tests/Attribute/Parameter/RequestTest.php
+++ b/tests/Attribute/Parameter/RequestTest.php
@@ -4,6 +4,7 @@
 
 namespace Yiisoft\Input\Http\Tests\Attribute\Parameter;
 
+use HttpSoft\Message\ServerRequest;
 use PHPUnit\Framework\TestCase;
 use Psr\Http\Message\ServerRequestInterface;
 use Yiisoft\Hydrator\AttributeHandling\Exception\UnexpectedAttributeException;
@@ -78,6 +79,23 @@ public function testNonExistPath(): void
         $this->assertSame('', $input->a);
     }
 
+    public function testNonExistPathReturnsFailResult(): void
+    {
+        $request = (new ServerRequest())->withAttribute('a', 'one');
+
+        $requestProvider = new RequestProvider();
+        $requestProvider->set($request);
+
+        $resolver = new RequestResolver($requestProvider);
+
+        $attribute = new Request('non-existing-key');
+        $context = TestHelper::createParameterAttributeResolveContext();
+
+        $result = $resolver->getParameterValue($attribute, $context);
+
+        $this->assertFalse($result->isResolved());
+    }
+
     public function testUnexpectedAttributeException(): void
     {
         $resolver = new RequestResolver($this->createMock(RequestProviderInterface::class));
diff --git a/tests/HydratorAttributeParametersResolver/CustomHydrator/CustomHydratorTest.php b/tests/HydratorAttributeParametersResolver/CustomHydrator/CustomHydratorTest.php
new file mode 100644
index 0000000..fb74a7f
--- /dev/null
+++ b/tests/HydratorAttributeParametersResolver/CustomHydrator/CustomHydratorTest.php
@@ -0,0 +1,55 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yiisoft\Input\Http\Tests\HydratorAttributeParametersResolver\CustomHydrator;
+
+use HttpSoft\Message\ServerRequest;
+use PHPUnit\Framework\TestCase;
+use Yiisoft\Hydrator\Hydrator;
+use Yiisoft\Hydrator\TypeCaster\TypeCastContext;
+use Yiisoft\Input\Http\Attribute\Parameter\Body;
+use Yiisoft\Input\Http\Attribute\Parameter\BodyResolver;
+use Yiisoft\Input\Http\HydratorAttributeParametersResolver;
+use Yiisoft\Input\Http\Tests\Support\CallableTypeCaster;
+use Yiisoft\Input\Http\Tests\Support\TestHelper;
+use Yiisoft\RequestProvider\RequestProvider;
+
+final class CustomHydratorTest extends TestCase
+{
+    public function testBase(): void
+    {
+        $request = new ServerRequest(parsedBody: ['user' => 'Vasya']);
+        $requestProvider = new RequestProvider();
+        $requestProvider->set($request);
+
+        $resolver = new HydratorAttributeParametersResolver(
+            TestHelper::createParameterAttributesHandler([
+                BodyResolver::class => new BodyResolver($requestProvider),
+            ]),
+            typeCaster: new CallableTypeCaster(
+                static fn(mixed $value, TypeCastContext $context) => $context->getHydrator()->create(User::class, [
+                    'name' => $value,
+                ]),
+            ),
+            hydrator: new Hydrator(
+                new CallableTypeCaster(
+                    static fn(mixed $value) => 'The ' . $value,
+                ),
+            ),
+        );
+
+        $parameters = TestHelper::getParameters(
+            static fn(
+                #[Body]
+                User $user,
+            ) => null,
+        );
+
+        $result = $resolver->resolve($parameters, $request);
+
+        $this->assertSame(['user'], array_keys($result));
+        $this->assertInstanceOf(User::class, $result['user']);
+        $this->assertSame('The Vasya', $result['user']->name);
+    }
+}
diff --git a/tests/HydratorAttributeParametersResolver/CustomHydrator/User.php b/tests/HydratorAttributeParametersResolver/CustomHydrator/User.php
new file mode 100644
index 0000000..b9895f6
--- /dev/null
+++ b/tests/HydratorAttributeParametersResolver/CustomHydrator/User.php
@@ -0,0 +1,12 @@
+<?php
+
+declare(strict_types=1);
+
+namespace Yiisoft\Input\Http\Tests\HydratorAttributeParametersResolver\CustomHydrator;
+
+final class User
+{
+    public function __construct(
+        public readonly string $name,
+    ) {}
+}
diff --git a/tests/HydratorAttributeParametersResolverTest.php b/tests/HydratorAttributeParametersResolver/HydratorAttributeParametersResolverTest.php
similarity index 97%
rename from tests/HydratorAttributeParametersResolverTest.php
rename to tests/HydratorAttributeParametersResolver/HydratorAttributeParametersResolverTest.php
index 212de88..c0f11cb 100644
--- a/tests/HydratorAttributeParametersResolverTest.php
+++ b/tests/HydratorAttributeParametersResolver/HydratorAttributeParametersResolverTest.php
@@ -2,7 +2,7 @@
 
 declare(strict_types=1);
 
-namespace Yiisoft\Input\Http\Tests;
+namespace Yiisoft\Input\Http\Tests\HydratorAttributeParametersResolver;
 
 use PHPUnit\Framework\TestCase;
 use Psr\Http\Message\ServerRequestInterface;
diff --git a/tests/Support/CallableTypeCaster.php b/tests/Support/CallableTypeCaster.php
index 6251e0e..572a701 100644
--- a/tests/Support/CallableTypeCaster.php
+++ b/tests/Support/CallableTypeCaster.php
@@ -16,6 +16,6 @@ public function __construct(
 
     public function cast(mixed $value, TypeCastContext $context): Result
     {
-        return Result::success(($this->callable)($value));
+        return Result::success(($this->callable)($value, $context));
     }
 }