diff --git a/.github/workflows/testing.yml b/.github/workflows/testing.yml
index caae9bdb0..72cf1a4bf 100644
--- a/.github/workflows/testing.yml
+++ b/.github/workflows/testing.yml
@@ -14,14 +14,6 @@ jobs:
       fail-fast: false
       test-command: composer test:unit
 
-#  feature:
-#    name: Feature Testing
-#    uses: ./.github/workflows/run-test-suite.yml
-#    with:
-#      fail-fast: true
-#      test-command: composer test:feat
-#      test-timeout: 20
-
   functional:
     name: Functional Testing
     uses: ./.github/workflows/run-test-suite.yml
diff --git a/phpunit.xml.dist b/phpunit.xml.dist
index 044038070..a982abbf3 100644
--- a/phpunit.xml.dist
+++ b/phpunit.xml.dist
@@ -27,9 +27,6 @@
         <testsuite name="Unit">
             <directory suffix="TestCase.php">tests/Unit</directory>
         </testsuite>
-        <testsuite name="Feature">
-            <directory suffix="TestCase.php">tests/Feature</directory>
-        </testsuite>
         <testsuite name="Functional">
             <directory suffix="TestCase.php">tests/Functional</directory>
         </testsuite>
diff --git a/tests/Feature/AbstractFeature.php b/tests/Feature/AbstractFeature.php
deleted file mode 100644
index 05ad53ec4..000000000
--- a/tests/Feature/AbstractFeature.php
+++ /dev/null
@@ -1,21 +0,0 @@
-<?php
-
-/**
- * This file is part of Temporal package.
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-declare(strict_types=1);
-
-namespace Temporal\Tests\Feature;
-
-use Temporal\Tests\TestCase;
-
-/**
- * @group feature
- */
-abstract class AbstractFeature extends TestCase
-{
-}
diff --git a/tests/Feature/Testing/CapturedClient.php b/tests/Feature/Testing/CapturedClient.php
deleted file mode 100644
index 32d0316be..000000000
--- a/tests/Feature/Testing/CapturedClient.php
+++ /dev/null
@@ -1,134 +0,0 @@
-<?php
-
-/**
- * This file is part of Temporal package.
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-declare(strict_types=1);
-
-namespace Temporal\Tests\Feature\Testing;
-
-use React\Promise\PromiseInterface;
-use Temporal\Internal\Transport\ClientInterface;
-use Temporal\Worker\Transport\Command\CommandInterface;
-use Temporal\Worker\Transport\Command\RequestInterface;
-use Temporal\Workflow\WorkflowContextInterface;
-
-class CapturedClient implements ClientInterface
-{
-    /**
-     * @var array<positive-int, PromiseInterface>
-     */
-    public array $requests = [];
-
-    /**
-     * @var ClientInterface
-     */
-    protected ClientInterface $parent;
-
-    /**
-     * @param ClientInterface $parent
-     */
-    public function __construct(ClientInterface $parent)
-    {
-        $this->parent = $parent;
-    }
-
-    /**
-     * @param RequestInterface $request
-     * @return PromiseInterface
-     */
-    public function request(RequestInterface $request, ?WorkflowContextInterface $context = null): PromiseInterface
-    {
-        return $this->requests[$request->getID()] = $this->parent->request($request)
-            ->then($this->onFulfilled($request), $this->onRejected($request));
-    }
-
-    public function send(CommandInterface $request): void
-    {
-        $this->parent->send($request);
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    public function fetchUnresolvedRequests(): array
-    {
-        try {
-            return $this->requests;
-        } finally {
-            $this->requests = [];
-        }
-    }
-
-    /**
-     * @return \Traversable
-     */
-    public function getIterator(): \Traversable
-    {
-        return new \ArrayIterator($this->requests);
-    }
-
-    /**
-     * @return int
-     */
-    public function count(): int
-    {
-        return \count($this->requests);
-    }
-
-    public function isQueued(CommandInterface $command): bool
-    {
-        return $this->parent->isQueued($command);
-    }
-
-    public function cancel(CommandInterface $command): void
-    {
-        $this->parent->cancel($command);
-    }
-
-    public function reject(CommandInterface $command, \Throwable $reason): void
-    {
-        $this->parent->reject($command, $reason);
-    }
-
-    public function dispatch(CommandInterface $response): void
-    {
-        $this->parent->dispatch($response);
-    }
-
-    public function fork(): ClientInterface
-    {
-        return $this->parent->fork();
-    }
-
-    /**
-     * @param RequestInterface $request
-     * @return \Closure
-     */
-    private function onFulfilled(RequestInterface $request): \Closure
-    {
-        return function ($response) use ($request) {
-            unset($this->requests[$request->getID()]);
-
-            return $response;
-        };
-    }
-
-    /**
-     * @param RequestInterface $request
-     * @return \Closure
-     * @psalm-suppress UnusedClosureParam
-     */
-    private function onRejected(RequestInterface $request): \Closure
-    {
-        return function (\Throwable $error) use ($request): void {
-            unset($this->requests[$request->getID()]);
-
-            throw $error;
-        };
-    }
-}
diff --git a/tests/Feature/Testing/TestingClient.php b/tests/Feature/Testing/TestingClient.php
deleted file mode 100644
index 6f58ac2d6..000000000
--- a/tests/Feature/Testing/TestingClient.php
+++ /dev/null
@@ -1,81 +0,0 @@
-<?php
-
-/**
- * This file is part of Temporal package.
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-declare(strict_types=1);
-
-namespace Temporal\Tests\Feature\Testing;
-
-use JetBrains\PhpStorm\Immutable;
-use React\Promise\PromiseInterface;
-use Temporal\Internal\Queue\QueueInterface;
-use Temporal\Internal\Transport\Client;
-use Temporal\Worker\LoopInterface;
-use Temporal\Worker\Transport\Command\Client\SuccessClientResponse;
-use Temporal\Worker\Transport\Command\RequestInterface;
-use Temporal\Worker\Transport\Command\Server\FailureResponse;
-use Temporal\Workflow\WorkflowContextInterface;
-
-class TestingClient extends CapturedClient
-{
-    /**
-     * @var TestingQueue
-     */
-    #[Immutable]
-    public TestingQueue $queue;
-
-    /**
-     * @param QueueInterface|null $queue
-     */
-    public function __construct(LoopInterface $loop, QueueInterface $queue = null)
-    {
-        $this->queue = $queue ?? new TestingQueue();
-
-        parent::__construct(new Client($this->queue));
-    }
-
-    /**
-     * @param RequestInterface $request
-     * @param mixed|null $payload
-     * @return TestingSuccessResponse
-     */
-    public function success(RequestInterface $request, $payload = null): TestingSuccessResponse
-    {
-        $response = new SuccessClientResponse($request->getID(), $payload);
-
-        $this->parent->dispatch($response);
-
-        return new TestingSuccessResponse($response);
-    }
-
-    /**
-     * @param RequestInterface $request
-     * @param \Throwable $error
-     * @return TestingFailureResponse
-     */
-    public function error(RequestInterface $request, \Throwable $error): TestingFailureResponse
-    {
-        $response = FailureResponse::fromException($error, $request->getID());
-
-        $this->parent->dispatch($response);
-
-        return new TestingFailureResponse($response);
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    public function request(RequestInterface $request, ?WorkflowContextInterface $context = null): PromiseInterface
-    {
-        if (!$request instanceof TestingRequest) {
-            $request = new TestingRequest($request);
-        }
-
-        return parent::request($request, $context);
-    }
-}
diff --git a/tests/Feature/Testing/TestingCommand.php b/tests/Feature/Testing/TestingCommand.php
deleted file mode 100644
index 6eee24056..000000000
--- a/tests/Feature/Testing/TestingCommand.php
+++ /dev/null
@@ -1,62 +0,0 @@
-<?php
-
-/**
- * This file is part of Temporal package.
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-declare(strict_types=1);
-
-namespace Temporal\Tests\Feature\Testing;
-
-use PHPUnit\Framework\Assert;
-use Temporal\Worker\Transport\Command\CommandInterface;
-
-/**
- * @template-covariant T of CommandInterface
- */
-abstract class TestingCommand implements CommandInterface
-{
-    /**
-     * @var T
-     */
-    protected CommandInterface $command;
-
-    /**
-     * @param T $command
-     */
-    public function __construct(CommandInterface $command)
-    {
-        $this->command = $command;
-    }
-
-    /**
-     * @return T
-     */
-    public function getCommand(): CommandInterface
-    {
-        return $this->command;
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    public function getID(): int
-    {
-        return $this->command->getID();
-    }
-
-    /**
-     * @param int $expected
-     * @param string $message
-     * @return $this
-     */
-    public function assertId(int $expected, string $message = ''): self
-    {
-        Assert::assertSame($expected, $this->getID(), $message);
-
-        return $this;
-    }
-}
diff --git a/tests/Feature/Testing/TestingEnvironment.php b/tests/Feature/Testing/TestingEnvironment.php
deleted file mode 100644
index b8cbd6aa0..000000000
--- a/tests/Feature/Testing/TestingEnvironment.php
+++ /dev/null
@@ -1,63 +0,0 @@
-<?php
-
-/**
- * This file is part of Temporal package.
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-declare(strict_types=1);
-
-namespace Temporal\Tests\Feature\Testing;
-
-use Carbon\CarbonInterface;
-use Carbon\CarbonTimeZone;
-use Temporal\Worker\Environment\Environment;
-
-class TestingEnvironment extends Environment
-{
-    /**
-     * @param CarbonTimeZone $zone
-     * @return TestingEnvironment
-     */
-    public function setZone(CarbonTimeZone $zone): self
-    {
-        $this->zone = $zone;
-
-        return $this;
-    }
-
-    /**
-     * @param CarbonInterface $tickTime
-     * @return TestingEnvironment
-     */
-    public function setTickTime(CarbonInterface $tickTime): self
-    {
-        $this->tickTime = $tickTime;
-
-        return $this;
-    }
-
-    /**
-     * @param string|null $runId
-     * @return TestingEnvironment
-     */
-    public function setRunId(?string $runId): self
-    {
-        $this->runId = $runId;
-
-        return $this;
-    }
-
-    /**
-     * @param bool $isReplaying
-     * @return TestingEnvironment
-     */
-    public function setIsReplaying(bool $isReplaying): self
-    {
-        $this->isReplaying = $isReplaying;
-
-        return $this;
-    }
-}
diff --git a/tests/Feature/Testing/TestingFailureResponse.php b/tests/Feature/Testing/TestingFailureResponse.php
deleted file mode 100644
index daad3dbdb..000000000
--- a/tests/Feature/Testing/TestingFailureResponse.php
+++ /dev/null
@@ -1,60 +0,0 @@
-<?php
-
-/**
- * This file is part of Temporal package.
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-declare(strict_types=1);
-
-namespace Temporal\Tests\Feature\Testing;
-
-use Temporal\Worker\Transport\Command\FailureResponseInterface;
-
-/**
- * @template-extends TestingCommand<ErrorResponseInterface>
- */
-class TestingFailureResponse extends TestingCommand implements FailureResponseInterface
-{
-    /**
-     * @param FailureResponseInterface $response
-     */
-    public function __construct(FailureResponseInterface $response)
-    {
-        parent::__construct($response);
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    public function getCode(): int
-    {
-        return $this->command->getCode();
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    public function getMessage(): string
-    {
-        return $this->command->getMessage();
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    public function getData()
-    {
-        return $this->command->getData();
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    public function toException(string $class = \LogicException::class): \Throwable
-    {
-        return $this->command->toException($class);
-    }
-}
diff --git a/tests/Feature/Testing/TestingLoop.php b/tests/Feature/Testing/TestingLoop.php
deleted file mode 100644
index 6436c4d12..000000000
--- a/tests/Feature/Testing/TestingLoop.php
+++ /dev/null
@@ -1,38 +0,0 @@
-<?php
-
-/**
- * This file is part of Temporal package.
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-declare(strict_types=1);
-
-namespace Temporal\Tests\Feature\Testing;
-
-use Temporal\Internal\Events\EventEmitterTrait;
-use Temporal\Worker\LoopInterface;
-
-final class TestingLoop implements LoopInterface
-{
-    use EventEmitterTrait;
-
-    /**
-     * @return void
-     */
-    public function tick(): void
-    {
-        $this->emit(LoopInterface::ON_TICK);
-    }
-
-    /**
-     * @return int
-     */
-    public function run(): int
-    {
-        $this->tick();
-
-        return 0;
-    }
-}
diff --git a/tests/Feature/Testing/TestingMarshaller.php b/tests/Feature/Testing/TestingMarshaller.php
deleted file mode 100644
index 219ff8934..000000000
--- a/tests/Feature/Testing/TestingMarshaller.php
+++ /dev/null
@@ -1,49 +0,0 @@
-<?php
-
-/**
- * This file is part of Temporal package.
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-declare(strict_types=1);
-
-namespace Temporal\Tests\Feature\Testing;
-
-use Spiral\Attributes\AttributeReader;
-use Temporal\Internal\Marshaller\Mapper\AttributeMapperFactory;
-use Temporal\Internal\Marshaller\Mapper\MapperFactoryInterface;
-use Temporal\Internal\Marshaller\Marshaller;
-use Temporal\Internal\Marshaller\MarshallerInterface;
-
-/**
- * @implements MarshallerInterface<array>
- */
-class TestingMarshaller implements MarshallerInterface
-{
-    /**
-     * @var Marshaller
-     */
-    private Marshaller $marshaller;
-
-    /**
-     * @param MapperFactoryInterface|null $mapper
-     */
-    public function __construct(MapperFactoryInterface $mapper = null)
-    {
-        $mapper ??= new AttributeMapperFactory(new AttributeReader());
-
-        $this->marshaller = new Marshaller($mapper);
-    }
-
-    public function marshal(object $from): array
-    {
-        return $this->marshaller->marshal($from);
-    }
-
-    public function unmarshal(array $from, object $to): object
-    {
-        return $this->marshaller->unmarshal($from, $to);
-    }
-}
diff --git a/tests/Feature/Testing/TestingQueue.php b/tests/Feature/Testing/TestingQueue.php
deleted file mode 100644
index 875dbca99..000000000
--- a/tests/Feature/Testing/TestingQueue.php
+++ /dev/null
@@ -1,241 +0,0 @@
-<?php
-
-/**
- * This file is part of Temporal package.
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-declare(strict_types=1);
-
-namespace Temporal\Tests\Feature\Testing;
-
-use PHPUnit\Framework\Assert;
-use Temporal\Internal\Queue\ArrayQueue;
-use Temporal\Worker\Transport\Command\Client\Request;
-use Temporal\Worker\Transport\Command\CommandInterface;
-use Temporal\Worker\Transport\Command\FailureResponseInterface;
-use Temporal\Worker\Transport\Command\RequestInterface;
-use Temporal\Worker\Transport\Command\ResponseInterface;
-use Temporal\Worker\Transport\Command\SuccessResponseInterface;
-
-class TestingQueue extends ArrayQueue
-{
-    /**
-     * {@inheritDoc}
-     */
-    public function getIterator(): \Traversable
-    {
-        while ($this->commands) {
-            yield $this->pop();
-        }
-    }
-
-    /**
-     * @return TestingRequest|TestingSuccessResponse|TestingFailureResponse
-     */
-    public function pop(): CommandInterface
-    {
-        return \array_pop($this->commands);
-    }
-
-    /**
-     * @return TestingRequest|TestingSuccessResponse|TestingFailureResponse
-     */
-    public function shift(): CommandInterface
-    {
-        return \array_shift($this->commands);
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    public function push(CommandInterface $command): void
-    {
-        if ($command instanceof Request) {
-            $command = new TestingRequest($command);
-        }
-
-        $this->commands[] = $command;
-    }
-
-    /**
-     * @return void
-     */
-    public function clear(): void
-    {
-        $this->commands = [];
-    }
-
-    /**
-     * @param int $expected
-     * @param string $message
-     * @return $this
-     */
-    public function assertCount(int $expected, string $message = ''): self
-    {
-        Assert::assertCount($expected, $this->commands, $message);
-
-        return $this;
-    }
-
-    /**
-     * @param int $expected
-     * @param string $message
-     * @return $this
-     */
-    public function assertTypesCount(string $class, int $expected, string $message = ''): self
-    {
-        $filter = static fn (CommandInterface $cmd) => $cmd instanceof $class;
-
-        Assert::assertCount($expected, \array_filter($this->commands, $filter), $message);
-
-        return $this;
-    }
-
-    /**
-     * @param int $expected
-     * @param string $message
-     * @return $this
-     */
-    public function assertRequestsCount(int $expected, string $message = ''): self
-    {
-        $this->assertTypesCount(RequestInterface::class, $expected, $message);
-
-        return $this;
-    }
-
-    /**
-     * @param int $expected
-     * @param string $message
-     * @return $this
-     */
-    public function assertResponsesCount(int $expected, string $message = ''): self
-    {
-        $this->assertTypesCount(ResponseInterface::class, $expected, $message);
-
-        return $this;
-    }
-
-    /**
-     * @param int $expected
-     * @param string $message
-     * @return $this
-     */
-    public function assertErrorResponsesCount(int $expected, string $message = ''): self
-    {
-        $this->assertTypesCount(FailureResponseInterface::class, $expected, $message);
-
-        return $this;
-    }
-
-    /**
-     * @param int $expected
-     * @param string $message
-     * @return $this
-     */
-    public function assertSuccessResponsesCount(int $expected, string $message = ''): self
-    {
-        $this->assertTypesCount(SuccessResponseInterface::class, $expected, $message);
-
-        return $this;
-    }
-
-    /**
-     * @param string $message
-     * @return $this
-     */
-    public function assertEmpty(string $message = ''): self
-    {
-        $this->assertCount(0, $message);
-
-        return $this;
-    }
-
-    /**
-     * @param string $message
-     * @return $this
-     */
-    public function assertNotEmpty(string $message = ''): self
-    {
-        Assert::assertTrue(\count($this->commands) > 0, $message);
-
-        return $this;
-    }
-
-    /**
-     * @param array $commands
-     * @param string $message
-     * @return $this
-     */
-    public function assertSame(array $commands, string $message = ''): self
-    {
-        Assert::assertSame($this->commands, $commands, $message);
-
-        return $this;
-    }
-
-    /**
-     * @param array $commands
-     * @param string $message
-     * @return $this
-     */
-    public function assertEquals(array $commands, string $message = ''): self
-    {
-        Assert::assertEquals($this->commands, $commands, $message);
-
-        return $this;
-    }
-
-    /**
-     * @return TestingRequest|TestingSuccessResponse|TestingFailureResponse
-     */
-    public function first(): CommandInterface
-    {
-        return $this->get(\array_key_first($this->commands));
-    }
-
-    /**
-     * @return TestingRequest|TestingSuccessResponse|TestingFailureResponse
-     */
-    public function last(): CommandInterface
-    {
-        return $this->get(\array_key_first($this->commands));
-    }
-
-    /**
-     * @param positive-int $index
-     * @return TestingRequest|TestingSuccessResponse|TestingFailureResponse|null
-     */
-    public function find(int $index): ?CommandInterface
-    {
-        return $this->commands[$index] ?? null;
-    }
-
-    /**
-     * @param positive-int $index
-     * @return TestingRequest|TestingSuccessResponse|TestingFailureResponse
-     */
-    public function get(int $index): CommandInterface
-    {
-        $command = $this->find($index);
-
-        Assert::assertNotNull($command);
-
-        return $command;
-    }
-
-    /**
-     * @param \Closure $assert
-     * @return $this
-     */
-    public function each(\Closure $assert): self
-    {
-        foreach ($this->commands as $command) {
-            $assert($command);
-        }
-
-        return $this;
-    }
-}
diff --git a/tests/Feature/Testing/TestingRequest.php b/tests/Feature/Testing/TestingRequest.php
deleted file mode 100644
index 7e8de46aa..000000000
--- a/tests/Feature/Testing/TestingRequest.php
+++ /dev/null
@@ -1,184 +0,0 @@
-<?php
-
-/**
- * This file is part of Temporal package.
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-declare(strict_types=1);
-
-namespace Temporal\Tests\Feature\Testing;
-
-use PHPUnit\Framework\Assert;
-use Temporal\Api\Common\V1\Payload;
-use Temporal\DataConverter\DataConverter;
-use Temporal\DataConverter\ValuesInterface;
-use Temporal\Interceptor\HeaderInterface;
-use Temporal\Worker\Transport\Command\RequestInterface;
-
-/**
- * @template-extends TestingCommand<RequestInterface>
- */
-class TestingRequest extends TestingCommand implements RequestInterface
-{
-    /**
-     * @param RequestInterface $request
-     */
-    public function __construct(RequestInterface $request)
-    {
-        parent::__construct($request);
-    }
-
-    /**
-     * @param string $expected
-     * @param string $message
-     * @return $this
-     */
-    public function assertName(string $expected, string $message = ''): self
-    {
-        Assert::assertSame($expected, $this->getName(), $message);
-
-        return $this;
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    public function getName(): string
-    {
-        return $this->command->getName();
-    }
-
-    /**
-     * @param string $key
-     * @return mixed
-     */
-    public function getParam(string $key)
-    {
-        return $this->getOption($key);
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    public function getOptions(): array
-    {
-        return $this->command->getOptions();
-    }
-
-    public function getPayloads(): ValuesInterface
-    {
-        return $this->command->getPayloads();
-    }
-
-    /**
-     * @param string $expected
-     * @param string $message
-     * @return $this
-     */
-    public function assertParamsSame(array $expected, string $message = ''): self
-    {
-        Assert::assertSame($expected, $this->getOptions(), $message);
-
-        return $this;
-    }
-
-    /**
-     * @param string $key
-     * @param mixed $expected
-     * @param string $message
-     * @return $this
-     */
-    public function assertParamsKeySame(string $key, $expected, string $message = ''): self
-    {
-        if ($expected === null) {
-            $this->assertParamsHasKey($key, $message);
-        }
-
-        Assert::assertEquals($expected, $this->getOption($key), $message);
-
-        return $this;
-    }
-
-    /**
-     * @param string $key
-     * @param string $message
-     * @return $this
-     */
-    public function assertParamsHasKey(string $key, string $message = ''): self
-    {
-        Assert::assertArrayHasKey($key, $this->getOptions(), $message);
-
-        return $this;
-    }
-
-    /**
-     * @param string $key
-     * @param mixed $expected
-     * @param string $message
-     * @return $this
-     */
-    public function assertParamsKeySamePayload(string $key, $expected, string $message = ''): self
-    {
-        if ($expected === null) {
-            $this->assertParamsHasKey($key, $message);
-        }
-
-        if (\is_array($expected)) {
-            $expected = \array_map([$this, 'convertValue'], $expected);
-        } else {
-            $expected = $this->convertValue($expected);
-        }
-
-        Assert::assertEquals($expected, $this->getOption($key), $message);
-
-        return $this;
-    }
-
-    private function convertValue($value): Payload
-    {
-        $dc = DataConverter::createDefault();
-
-        return $dc->toPayload([$value])[0];
-    }
-
-    /**
-     * @param string $key
-     * @param class-string $expected
-     * @param string $message
-     * @return $this
-     */
-    public function assertParamsKeyInstanceOf(string $key, string $expected, string $message = ''): self
-    {
-        Assert::assertInstanceOf($expected, $this->getOption($key), $message);
-
-        return $this;
-    }
-
-    /**
-     * @param string $key
-     * @param mixed $expected
-     * @param string $message
-     * @return $this
-     */
-    public function assertParamsKeyNotSame(string $key, $expected, string $message = ''): self
-    {
-        $this->assertParamsHasKey($key, $message);
-
-        Assert::assertNotSame($expected, $this->getOption($key), $message);
-
-        return $this;
-    }
-
-    public function isCancellable(): bool
-    {
-        return true;
-    }
-
-    private function getOption(string $key): mixed
-    {
-        return $this->getOptions()[$key] ?? null;
-    }
-}
diff --git a/tests/Feature/Testing/TestingSuccessResponse.php b/tests/Feature/Testing/TestingSuccessResponse.php
deleted file mode 100644
index 9c8035bdc..000000000
--- a/tests/Feature/Testing/TestingSuccessResponse.php
+++ /dev/null
@@ -1,36 +0,0 @@
-<?php
-
-/**
- * This file is part of Temporal package.
- *
- * For the full copyright and license information, please view the LICENSE
- * file that was distributed with this source code.
- */
-
-declare(strict_types=1);
-
-namespace Temporal\Tests\Feature\Testing;
-
-use Temporal\Worker\Transport\Command\SuccessResponseInterface;
-
-/**
- * @template-extends TestingCommand<SuccessResponseInterface>
- */
-class TestingSuccessResponse extends TestingCommand implements SuccessResponseInterface
-{
-    /**
-     * @param SuccessResponseInterface $response
-     */
-    public function __construct(SuccessResponseInterface $response)
-    {
-        parent::__construct($response);
-    }
-
-    /**
-     * {@inheritDoc}
-     */
-    public function getPayloads(): array
-    {
-        return $this->command->getPayloads();
-    }
-}