diff --git a/src/Fetch/Enum/Status.php b/src/Fetch/Enum/Status.php
index 1656307..31b4f0a 100644
--- a/src/Fetch/Enum/Status.php
+++ b/src/Fetch/Enum/Status.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Fetch\Enum;
 
 enum Status: int
diff --git a/src/Fetch/Http/ClientHandler.php b/src/Fetch/Http/ClientHandler.php
index f74adf6..6ef8b66 100644
--- a/src/Fetch/Http/ClientHandler.php
+++ b/src/Fetch/Http/ClientHandler.php
@@ -1,17 +1,19 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Fetch\Http;
 
-use Fetch\Interfaces\ClientHandler as ClientHandlerInterface;
-use Fetch\Interfaces\Response as ResponseInterface;
+use RuntimeException;
+use Matrix\AsyncHelper;
+use InvalidArgumentException;
 use GuzzleHttp\Client as SyncClient;
+use Psr\Http\Client\ClientInterface;
 use GuzzleHttp\Cookie\CookieJarInterface;
 use GuzzleHttp\Exception\RequestException;
-use InvalidArgumentException;
-use Matrix\AsyncHelper;
+use Fetch\Interfaces\Response as ResponseInterface;
 use Matrix\Interfaces\AsyncHelper as AsyncHelperInterface;
-use Psr\Http\Client\ClientInterface;
-use RuntimeException;
+use Fetch\Interfaces\ClientHandler as ClientHandlerInterface;
 
 class ClientHandler implements ClientHandlerInterface
 {
@@ -32,11 +34,9 @@ class ClientHandler implements ClientHandlerInterface
 
     /**
      * Default options for the request.
-     *
-     * @var array
      */
     protected static array $defaultOptions = [
-        'method' => 'GET',
+        'method'  => 'GET',
         'headers' => [],
         'timeout' => self::DEFAULT_TIMEOUT,
     ];
@@ -44,13 +44,12 @@ class ClientHandler implements ClientHandlerInterface
     /**
      * ClientHandler constructor.
      *
-     * @param ClientInterface|null $syncClient The synchronous HTTP client.
-     * @param array                $options    The options for the request.
-     * @param int|null             $timeout    Timeout for the request.
-     * @param int|null             $retries    Number of retries for the request.
-     * @param int|null             $retryDelay Delay between retries.
-     * @param bool                 $isAsync    Whether the request is asynchronous.
-     *
+     * @param  ClientInterface|null  $syncClient  The synchronous HTTP client.
+     * @param  array  $options  The options for the request.
+     * @param  int|null  $timeout  Timeout for the request.
+     * @param  int|null  $retries  Number of retries for the request.
+     * @param  int|null  $retryDelay  Delay between retries.
+     * @param  bool  $isAsync  Whether the request is asynchronous.
      * @return void
      */
     public function __construct(
@@ -60,21 +59,14 @@ public function __construct(
         protected ?int $retries = null,
         protected ?int $retryDelay = null,
         protected bool $isAsync = false
-    ) {
-    }
+    ) {}
 
     /**
      * Apply options and execute the request.
-     *
-     * @param string $method
-     * @param string $uri
-     * @param array  $options
-     *
-     * @return mixed
      */
     public static function handle(string $method, string $uri, array $options = []): mixed
     {
-        $handler = new static();
+        $handler = new static;
         $handler->applyOptions($options);
 
         return $handler->finalizeRequest($method, $uri);
@@ -82,10 +74,6 @@ public static function handle(string $method, string $uri, array $options = []):
 
     /**
      * Apply the options to the handler.
-     *
-     * @param array $options
-     *
-     * @return void
      */
     protected function applyOptions(array $options): void
     {
@@ -107,11 +95,6 @@ protected function applyOptions(array $options): void
 
     /**
      * Finalize the request and send it.
-     *
-     * @param string $method
-     * @param string $uri
-     *
-     * @return mixed
      */
     protected function finalizeRequest(string $method, string $uri): mixed
     {
@@ -125,8 +108,6 @@ protected function finalizeRequest(string $method, string $uri): mixed
 
     /**
      * Merge class properties and options into the final options array.
-     *
-     * @return void
      */
     protected function mergeOptionsAndProperties(): void
     {
@@ -137,8 +118,6 @@ protected function mergeOptionsAndProperties(): void
 
     /**
      * Send a synchronous HTTP request.
-     *
-     * @return ResponseInterface
      */
     protected function sendSync(): ResponseInterface
     {
@@ -155,8 +134,6 @@ protected function sendSync(): ResponseInterface
 
     /**
      * Send an asynchronous HTTP request.
-     *
-     * @return AsyncHelperInterface
      */
     protected function sendAsync(): AsyncHelperInterface
     {
@@ -167,10 +144,6 @@ protected function sendAsync(): AsyncHelperInterface
 
     /**
      * Implement retry logic for the request with exponential backoff.
-     *
-     * @param callable $request
-     *
-     * @return ResponseInterface
      */
     protected function retryRequest(callable $request): ResponseInterface
     {
@@ -193,10 +166,6 @@ protected function retryRequest(callable $request): ResponseInterface
 
     /**
      * Determine if an error is retryable.
-     *
-     * @param RequestException $e
-     *
-     * @return bool
      */
     protected function isRetryableError(RequestException $e): bool
     {
@@ -205,8 +174,6 @@ protected function isRetryableError(RequestException $e): bool
 
     /**
      * Get the full URI for the request.
-     *
-     * @return string
      */
     protected function getFullUri(): string
     {
@@ -234,8 +201,6 @@ protected function getFullUri(): string
 
     /**
      * Reset the handler state.
-     *
-     * @return self
      */
     public function reset(): self
     {
@@ -250,13 +215,11 @@ public function reset(): self
 
     /**
      * Get the synchronous HTTP client.
-     *
-     * @return ClientInterface
      */
     public function getSyncClient(): ClientInterface
     {
         if (! $this->syncClient) {
-            $this->syncClient = new SyncClient();
+            $this->syncClient = new SyncClient;
         }
 
         return $this->syncClient;
@@ -264,10 +227,6 @@ public function getSyncClient(): ClientInterface
 
     /**
      * Set the synchronous HTTP client.
-     *
-     * @param ClientInterface $syncClient
-     *
-     * @return self
      */
     public function setSyncClient(ClientInterface $syncClient): self
     {
@@ -278,8 +237,6 @@ public function setSyncClient(ClientInterface $syncClient): self
 
     /**
      * Get the default options for the request.
-     *
-     * @return array
      */
     public static function getDefaultOptions(): array
     {
@@ -288,10 +245,6 @@ public static function getDefaultOptions(): array
 
     /**
      * Set the base URI for the request.
-     *
-     * @param string $baseUri
-     *
-     * @return self
      */
     public function baseUri(string $baseUri): self
     {
@@ -302,10 +255,6 @@ public function baseUri(string $baseUri): self
 
     /**
      * Set the token for the request.
-     *
-     * @param string $token
-     *
-     * @return self
      */
     public function withToken(string $token): self
     {
@@ -316,11 +265,6 @@ public function withToken(string $token): self
 
     /**
      * Set the basic auth for the request.
-     *
-     * @param string $username
-     * @param string $password
-     *
-     * @return self
      */
     public function withAuth(string $username, string $password): self
     {
@@ -331,10 +275,6 @@ public function withAuth(string $username, string $password): self
 
     /**
      * Set the headers for the request.
-     *
-     * @param array $headers
-     *
-     * @return self
      */
     public function withHeaders(array $headers): self
     {
@@ -348,10 +288,6 @@ public function withHeaders(array $headers): self
 
     /**
      * Set the body for the request.
-     *
-     * @param array $body
-     *
-     * @return self
      */
     public function withBody(array $body): self
     {
@@ -362,10 +298,6 @@ public function withBody(array $body): self
 
     /**
      * Set the query parameters for the request.
-     *
-     * @param array $queryParams
-     *
-     * @return self
      */
     public function withQueryParameters(array $queryParams): self
     {
@@ -376,10 +308,6 @@ public function withQueryParameters(array $queryParams): self
 
     /**
      * Set the timeout for the request.
-     *
-     * @param int $seconds
-     *
-     * @return self
      */
     public function timeout(int $seconds): self
     {
@@ -390,11 +318,6 @@ public function timeout(int $seconds): self
 
     /**
      * Set the retry logic for the request.
-     *
-     * @param int $retries
-     * @param int $delay
-     *
-     * @return self
      */
     public function retry(int $retries, int $delay = 100): self
     {
@@ -406,8 +329,6 @@ public function retry(int $retries, int $delay = 100): self
 
     /**
      * Set the request to be asynchronous.
-     *
-     * @return self
      */
     public function async(): self
     {
@@ -418,10 +339,6 @@ public function async(): self
 
     /**
      * Set the proxy for the request.
-     *
-     * @param string|array $proxy
-     *
-     * @return self
      */
     public function withProxy(string|array $proxy): self
     {
@@ -432,10 +349,6 @@ public function withProxy(string|array $proxy): self
 
     /**
      * Set the cookies for the request.
-     *
-     * @param bool|\GuzzleHttp\Cookie\CookieJarInterface $cookies
-     *
-     * @return self
      */
     public function withCookies(bool|CookieJarInterface $cookies): self
     {
@@ -446,10 +359,6 @@ public function withCookies(bool|CookieJarInterface $cookies): self
 
     /**
      * Set whether to follow redirects.
-     *
-     * @param bool|array $redirects
-     *
-     * @return self
      */
     public function withRedirects(bool|array $redirects = true): self
     {
@@ -460,10 +369,6 @@ public function withRedirects(bool|array $redirects = true): self
 
     /**
      * Set the certificate for the request.
-     *
-     * @param string|array $cert
-     *
-     * @return self
      */
     public function withCert(string|array $cert): self
     {
@@ -474,10 +379,6 @@ public function withCert(string|array $cert): self
 
     /**
      * Set the SSL key for the request.
-     *
-     * @param string|array $sslKey
-     *
-     * @return self
      */
     public function withSslKey(string|array $sslKey): self
     {
@@ -488,10 +389,6 @@ public function withSslKey(string|array $sslKey): self
 
     /**
      * Set the stream option for the request.
-     *
-     * @param bool $stream
-     *
-     * @return self
      */
     public function withStream(bool $stream): self
     {
@@ -502,10 +399,6 @@ public function withStream(bool $stream): self
 
     /**
      * Finalize and send a GET request.
-     *
-     * @param string $uri
-     *
-     * @return mixed
      */
     public function get(string $uri): mixed
     {
@@ -514,11 +407,6 @@ public function get(string $uri): mixed
 
     /**
      * Finalize and send a POST request.
-     *
-     * @param string $uri
-     * @param mixed  $body
-     *
-     * @return mixed
      */
     public function post(string $uri, mixed $body = null): mixed
     {
@@ -531,11 +419,6 @@ public function post(string $uri, mixed $body = null): mixed
 
     /**
      * Finalize and send a PUT request.
-     *
-     * @param string $uri
-     * @param mixed  $body
-     *
-     * @return mixed
      */
     public function put(string $uri, mixed $body = null): mixed
     {
@@ -548,10 +431,6 @@ public function put(string $uri, mixed $body = null): mixed
 
     /**
      * Finalize and send a DELETE request.
-     *
-     * @param string $uri
-     *
-     * @return mixed
      */
     public function delete(string $uri): mixed
     {
@@ -560,10 +439,6 @@ public function delete(string $uri): mixed
 
     /**
      * Finalize and send an OPTIONS request.
-     *
-     * @param string $uri
-     *
-     * @return mixed
      */
     public function options(string $uri): mixed
     {
diff --git a/src/Fetch/Http/Response.php b/src/Fetch/Http/Response.php
index ab4c93c..1161aff 100644
--- a/src/Fetch/Http/Response.php
+++ b/src/Fetch/Http/Response.php
@@ -1,29 +1,23 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Fetch\Http;
 
-use Fetch\Interfaces\Response as ResponseInterface;
+use RuntimeException;
 use GuzzleHttp\Psr7\Response as BaseResponse;
+use Fetch\Interfaces\Response as ResponseInterface;
 use Psr\Http\Message\ResponseInterface as PsrResponseInterface;
-use RuntimeException;
 
 class Response extends BaseResponse implements ResponseInterface
 {
     /**
      * The buffered content of the body.
-     *
-     * @var string
      */
     protected string $bodyContents;
 
     /**
      * Create new response instance.
-     *
-     * @param int    $status
-     * @param array  $headers
-     * @param string $body
-     * @param string $version
-     * @param string $reason
      */
     public function __construct(
         int $status = 200,
@@ -41,8 +35,7 @@ public function __construct(
     /**
      * Get the body as a JSON-decoded array or object.
      *
-     * @param bool $assoc Whether to return associative array (true) or object (false)
-     *
+     * @param  bool  $assoc  Whether to return associative array (true) or object (false)
      * @return mixed
      */
     public function json(bool $assoc = true, bool $throwOnError = true)
@@ -63,8 +56,6 @@ public function json(bool $assoc = true, bool $throwOnError = true)
 
     /**
      * Get the body as plain text.
-     *
-     * @return string
      */
     public function text(): string
     {
@@ -79,6 +70,7 @@ public function text(): string
     public function blob()
     {
         $stream = fopen('php://memory', 'r+');
+
         if ($stream === false) {
             return false;
         }
@@ -90,8 +82,6 @@ public function blob()
 
     /**
      * Get the body as an array buffer (binary data).
-     *
-     * @return string
      */
     public function arrayBuffer(): string
     {
@@ -100,8 +90,6 @@ public function arrayBuffer(): string
 
     /**
      * Get the status text for the response (e.g., "OK").
-     *
-     * @return string
      */
     public function statusText(): string
     {
@@ -112,10 +100,6 @@ public function statusText(): string
      * Create a new response from a base response.
      *
      * Note: The response body will be fully read into memory.
-     *
-     * @param \Psr\Http\Message\ResponseInterface $response
-     *
-     * @return self
      */
     public static function createFromBase(PsrResponseInterface $response): self
     {
@@ -130,8 +114,6 @@ public static function createFromBase(PsrResponseInterface $response): self
 
     /**
      * Check if the response status code is informational (1xx).
-     *
-     * @return bool
      */
     public function isInformational(): bool
     {
@@ -140,8 +122,6 @@ public function isInformational(): bool
 
     /**
      * Check if the response status code is OK (2xx).
-     *
-     * @return bool
      */
     public function ok(): bool
     {
@@ -150,8 +130,6 @@ public function ok(): bool
 
     /**
      * Check if the response status code is a redirection (3xx).
-     *
-     * @return bool
      */
     public function isRedirection(): bool
     {
@@ -160,8 +138,6 @@ public function isRedirection(): bool
 
     /**
      * Check if the response status code is a client error (4xx).
-     *
-     * @return bool
      */
     public function isClientError(): bool
     {
@@ -170,8 +146,6 @@ public function isClientError(): bool
 
     /**
      * Check if the response status code is a server error (5xx).
-     *
-     * @return bool
      */
     public function isServerError(): bool
     {
diff --git a/src/Fetch/Http/fetch.php b/src/Fetch/Http/fetch.php
index 11df08c..e6791ba 100644
--- a/src/Fetch/Http/fetch.php
+++ b/src/Fetch/Http/fetch.php
@@ -1,17 +1,14 @@
 <?php
 
-use Fetch\Http\ClientHandler;
+declare(strict_types=1);
+
 use Fetch\Http\Response;
+use Fetch\Http\ClientHandler;
 use GuzzleHttp\Exception\RequestException;
 
 if (! function_exists('fetch')) {
     /**
      * Perform an HTTP request similar to JavaScript's fetch API.
-     *
-     * @param string|null $url
-     * @param array|null  $options
-     *
-     * @return \Fetch\Http\Response|\Fetch\Http\ClientHandler
      */
     function fetch(?string $url = null, ?array $options = []): Response|ClientHandler
     {
diff --git a/src/Fetch/Interfaces/ClientHandler.php b/src/Fetch/Interfaces/ClientHandler.php
index cc957d6..0f8a498 100644
--- a/src/Fetch/Interfaces/ClientHandler.php
+++ b/src/Fetch/Interfaces/ClientHandler.php
@@ -1,197 +1,116 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Fetch\Interfaces;
 
-use GuzzleHttp\Cookie\CookieJarInterface;
 use Psr\Http\Client\ClientInterface;
+use GuzzleHttp\Cookie\CookieJarInterface;
 
 interface ClientHandler
 {
     /**
      * Handle the request with the given method, URI, and options.
-     *
-     * @param string $method
-     * @param string $uri
-     * @param array  $options
-     *
-     * @return mixed
      */
     public static function handle(string $method, string $uri, array $options = []): mixed;
 
     /**
      * Set the headers for the request.
-     *
-     * @param array $headers
-     *
-     * @return self
      */
     public function withHeaders(array $headers): self;
 
     /**
      * Set the body for the request.
-     *
-     * @param array $body
-     *
-     * @return self
      */
     public function withBody(array $body): self;
 
     /**
      * Set the query parameters for the request.
-     *
-     * @param array $queryParams
-     *
-     * @return self
      */
     public function withQueryParameters(array $queryParams): self;
 
     /**
      * Set the timeout for the request.
-     *
-     * @param int $seconds
-     *
-     * @return self
      */
     public function timeout(int $seconds): self;
 
     /**
      * Set the retry logic for the request.
-     *
-     * @param int $retries
-     * @param int $delay
-     *
-     * @return self
      */
     public function retry(int $retries, int $delay = 100): self;
 
     /**
      * Set the request to be asynchronous.
-     *
-     * @return self
      */
     public function async(): self;
 
     /**
      * Set the proxy for the request.
-     *
-     * @param string|array $proxy
-     *
-     * @return self
      */
     public function withProxy(string|array $proxy): self;
 
     /**
      * Set the cookies for the request.
-     *
-     * @param bool|\GuzzleHttp\Cookie\CookieJarInterface $cookies
-     *
-     * @return self
      */
     public function withCookies(bool|CookieJarInterface $cookies): self;
 
     /**
      * Set whether to follow redirects.
-     *
-     * @param bool|array $redirects
-     *
-     * @return self
      */
     public function withRedirects(bool|array $redirects = true): self;
 
     /**
      * Set the certificate for the request.
-     *
-     * @param string|array $cert
-     *
-     * @return self
      */
     public function withCert(string|array $cert): self;
 
     /**
      * Set the SSL key for the request.
-     *
-     * @param string|array $sslKey
-     *
-     * @return self
      */
     public function withSslKey(string|array $sslKey): self;
 
     /**
      * Set the stream option for the request.
-     *
-     * @param bool $stream
-     *
-     * @return self
      */
     public function withStream(bool $stream): self;
 
     /**
      * Finalize and send a GET request.
-     *
-     * @param string $uri
-     *
-     * @return mixed
      */
     public function get(string $uri): mixed;
 
     /**
      * Finalize and send a POST request.
-     *
-     * @param string $uri
-     * @param mixed  $body
-     *
-     * @return mixed
      */
     public function post(string $uri, mixed $body = null): mixed;
 
     /**
      * Finalize and send a PUT request.
-     *
-     * @param string $uri
-     * @param mixed  $body
-     *
-     * @return mixed
      */
     public function put(string $uri, mixed $body = null): mixed;
 
     /**
      * Finalize and send a DELETE request.
-     *
-     * @param string $uri
-     *
-     * @return mixed
      */
     public function delete(string $uri): mixed;
 
     /**
      * Finalize and send an OPTIONS request.
-     *
-     * @param string $uri
-     *
-     * @return mixed
      */
     public function options(string $uri): mixed;
 
     /**
      * Get the synchronous HTTP client.
-     *
-     * @return \Psr\Http\Client\ClientInterface
      */
     public function getSyncClient(): ClientInterface;
 
     /**
      * Set the synchronous HTTP client.
-     *
-     * @param \Psr\Http\Client\ClientInterface $syncClient
-     *
-     * @return self
      */
     public function setSyncClient(ClientInterface $syncClient): self;
 
     /**
      * Get the default options for the request.
-     *
-     * @return array
      */
     public static function getDefaultOptions(): array;
 }
diff --git a/src/Fetch/Interfaces/Response.php b/src/Fetch/Interfaces/Response.php
index 08cc520..5fad352 100644
--- a/src/Fetch/Interfaces/Response.php
+++ b/src/Fetch/Interfaces/Response.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Fetch\Interfaces;
 
 use Psr\Http\Message\ResponseInterface as PsrResponseInterface;
@@ -9,17 +11,14 @@ interface Response extends PsrResponseInterface
     /**
      * Get the body as a JSON-decoded array or object.
      *
-     * @param bool $assoc        Whether to return associative array (true) or object (false)
-     * @param bool $throwOnError Whether to throw an exception on JSON decode error
-     *
+     * @param  bool  $assoc  Whether to return associative array (true) or object (false)
+     * @param  bool  $throwOnError  Whether to throw an exception on JSON decode error
      * @return mixed
      */
     public function json(bool $assoc = true, bool $throwOnError = true);
 
     /**
      * Get the body as plain text.
-     *
-     * @return string
      */
     public function text(): string;
 
@@ -32,15 +31,11 @@ public function blob();
 
     /**
      * Get the body as an array buffer (binary data).
-     *
-     * @return string
      */
     public function arrayBuffer(): string;
 
     /**
      * Get the status text for the response (e.g., "OK").
-     *
-     * @return string
      */
     public function statusText(): string;
 
@@ -48,45 +43,31 @@ public function statusText(): string;
      * Create a new response from a base response.
      *
      * Note: The response body will be fully read into memory.
-     *
-     * @param \Psr\Http\Message\ResponseInterface $response
-     *
-     * @return self
      */
     public static function createFromBase(PsrResponseInterface $response): self;
 
     /**
      * Check if the response status code is informational (1xx).
-     *
-     * @return bool
      */
     public function isInformational(): bool;
 
     /**
      * Check if the response status code is OK (2xx).
-     *
-     * @return bool
      */
     public function ok(): bool;
 
     /**
      * Check if the response status code is a redirection (3xx).
-     *
-     * @return bool
      */
     public function isRedirection(): bool;
 
     /**
      * Check if the response status code is a client error (4xx).
-     *
-     * @return bool
      */
     public function isClientError(): bool;
 
     /**
      * Check if the response status code is a server error (5xx).
-     *
-     * @return bool
      */
     public function isServerError(): bool;
 }
diff --git a/tests/Integration/HttpTest.php b/tests/Integration/HttpTest.php
index 31c041b..b6f2a93 100644
--- a/tests/Integration/HttpTest.php
+++ b/tests/Integration/HttpTest.php
@@ -1,11 +1,13 @@
 <?php
 
-use Fetch\Http\ClientHandler;
-use Fetch\Http\Response;
+declare(strict_types=1);
+
 use GuzzleHttp\Client;
-use GuzzleHttp\Exception\RequestException;
-use GuzzleHttp\Psr7\Request;
+use Fetch\Http\Response;
 use Mockery\MockInterface;
+use GuzzleHttp\Psr7\Request;
+use Fetch\Http\ClientHandler;
+use GuzzleHttp\Exception\RequestException;
 
 beforeEach(function () {
     \Mockery::close(); // Reset Mockery before each test
@@ -22,7 +24,7 @@
             ->andReturn(new Response(200, [], json_encode(['success' => true])));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $clientHandler->setSyncClient($mockClient);
 
     $response = $clientHandler->get('https://example.com');
@@ -42,7 +44,7 @@
             ->andReturn(new Response(200, [], json_encode(['async' => 'result'])));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $clientHandler->setSyncClient($mockClient);
 
     async(fn () => $clientHandler->get('https://example.com'))
@@ -65,7 +67,7 @@
             ->andReturn(new Response(200, [], 'Headers checked'));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $clientHandler->setSyncClient($mockClient);
 
     $response = $clientHandler->withHeaders(['Authorization' => 'Bearer token'])
@@ -87,7 +89,7 @@
             ->andReturn(new Response(200, [], 'Query params checked'));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $clientHandler->setSyncClient($mockClient);
 
     $response = $clientHandler->withQueryParameters(['foo' => 'bar', 'baz' => 'qux'])
@@ -109,7 +111,7 @@
             ->andThrow(new RequestException('Timeout', new Request('GET', 'https://example.com')));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $clientHandler->setSyncClient($mockClient);
 
     expect(fn () => $clientHandler->timeout(1)->get('https://example.com'))
@@ -131,7 +133,7 @@
             ->andReturn(new Response(200, [], 'Success after retry'));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $clientHandler->setSyncClient($mockClient);
 
     $response = $clientHandler->retry(2, 100)->get('https://example.com');
@@ -152,7 +154,7 @@
             ->andReturn(new Response(201, [], 'Created'));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $clientHandler->setSyncClient($mockClient);
 
     $response = $clientHandler->withBody(['name' => 'John'])
@@ -177,7 +179,7 @@
             ->andReturn(new Response(200, [], 'Success after retry'));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $clientHandler->setSyncClient($mockClient);
 
     async(fn () => $clientHandler->retry(2, 100)->get('https://example.com'))
diff --git a/tests/Pest.php b/tests/Pest.php
index fd279ad..4e6310e 100644
--- a/tests/Pest.php
+++ b/tests/Pest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 /*
 |--------------------------------------------------------------------------
 | Test Case
diff --git a/tests/TestCase.php b/tests/TestCase.php
index cfb05b6..d42f312 100644
--- a/tests/TestCase.php
+++ b/tests/TestCase.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 namespace Tests;
 
 use PHPUnit\Framework\TestCase as BaseTestCase;
diff --git a/tests/Unit/ClientHandlerTest.php b/tests/Unit/ClientHandlerTest.php
index 782c26b..781c40c 100644
--- a/tests/Unit/ClientHandlerTest.php
+++ b/tests/Unit/ClientHandlerTest.php
@@ -1,11 +1,13 @@
 <?php
 
-use Fetch\Http\ClientHandler;
-use Fetch\Http\Response;
+declare(strict_types=1);
+
 use GuzzleHttp\Client;
-use GuzzleHttp\Exception\RequestException;
-use GuzzleHttp\Psr7\Request;
+use Fetch\Http\Response;
 use Mockery\MockInterface;
+use GuzzleHttp\Psr7\Request;
+use Fetch\Http\ClientHandler;
+use GuzzleHttp\Exception\RequestException;
 
 beforeEach(function () {
     \Mockery::close(); // Reset Mockery before each test
@@ -22,7 +24,7 @@
             ->andReturn(new Response(200, [], json_encode(['success' => true])));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $clientHandler->setSyncClient($mockClient);
 
     $response = $clientHandler->get('https://example.com');
@@ -40,7 +42,7 @@
             ->andReturn(new Response(200, [], json_encode(['success' => true])));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $response = $clientHandler->setSyncClient($mockClient)
         ->baseUri('http://localhost')
         ->get('/');
@@ -60,7 +62,7 @@
             ->andReturn(new Response(200, [], json_encode(['async' => 'result'])));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $clientHandler->setSyncClient($mockClient);
 
     // Directly invoke the async method and interact with the AsyncHelper instance
@@ -82,7 +84,7 @@
             ->andReturn(new Response(201, [], json_encode(['success' => true])));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $response = $clientHandler->setSyncClient($mockClient)
         ->baseUri('http://localhost')
         ->withHeaders(['Content-Type' => 'application/json'])
@@ -107,7 +109,7 @@
             ->andReturn(new Response(200, [], 'Headers checked'));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $clientHandler->setSyncClient($mockClient);
 
     $response = $clientHandler->withHeaders(['Authorization' => 'Bearer token'])
@@ -129,7 +131,7 @@
             ->andReturn(new Response(200, [], 'Query params checked'));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $clientHandler->setSyncClient($mockClient);
 
     $response = $clientHandler->withQueryParameters(['foo' => 'bar', 'baz' => 'qux'])
@@ -151,7 +153,7 @@
             ->andThrow(new RequestException('Timeout', new Request('GET', 'https://example.com')));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $clientHandler->setSyncClient($mockClient);
 
     try {
@@ -176,7 +178,7 @@
             ->andReturn(new Response(200, [], 'Success after retry'));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $clientHandler->setSyncClient($mockClient);
 
     $response = $clientHandler->retry(2)->get('https://example.com'); // Retry once on failure
@@ -197,7 +199,7 @@
             ->andReturn(new Response(201, [], 'Created'));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $clientHandler->setSyncClient($mockClient);
 
     $response = $clientHandler->withBody(['name' => 'John'])
@@ -222,7 +224,7 @@
             ->andReturn(new Response(200, [], 'Success after retry'));
     });
 
-    $clientHandler = new ClientHandler();
+    $clientHandler = new ClientHandler;
     $clientHandler->setSyncClient($mockClient);
 
     async(fn () => $clientHandler->retry(2)->get('https://example.com'))
diff --git a/tests/Unit/FetchTest.php b/tests/Unit/FetchTest.php
index 60ded49..0221c7a 100644
--- a/tests/Unit/FetchTest.php
+++ b/tests/Unit/FetchTest.php
@@ -1,10 +1,12 @@
 <?php
 
-use Fetch\Http\Response;
+declare(strict_types=1);
+
 use GuzzleHttp\Client;
-use GuzzleHttp\Exception\RequestException;
-use GuzzleHttp\Psr7\Request;
+use Fetch\Http\Response;
 use Mockery\MockInterface;
+use GuzzleHttp\Psr7\Request;
+use GuzzleHttp\Exception\RequestException;
 
 beforeEach(function () {
     \Mockery::close(); // Reset Mockery before each test
@@ -83,7 +85,7 @@
 
     $response = fetch('http://localhost', [
         'headers' => ['Authorization' => 'Bearer token'],
-        'client' => $mockClient
+        'client'  => $mockClient,
     ]);
 
     expect($response->text())->toBe('Headers checked');
@@ -103,8 +105,8 @@
     });
 
     $response = fetch('http://localhost', [
-        'query' => ['foo' => 'bar', 'baz' => 'qux'],
-        'client' => $mockClient
+        'query'  => ['foo' => 'bar', 'baz' => 'qux'],
+        'client' => $mockClient,
     ]);
 
     expect($response->text())->toBe('Query params checked');
@@ -165,8 +167,8 @@
 
     $response = fetch('http://localhost/users', [
         'method' => 'POST',
-        'body' => json_encode(['name' => 'John']),
-        'client' => $mockClient
+        'body'   => json_encode(['name' => 'John']),
+        'client' => $mockClient,
     ]);
 
     expect($response->getStatusCode())->toBe(201);
diff --git a/tests/Unit/ResponseTest.php b/tests/Unit/ResponseTest.php
index ed5cc62..f125712 100644
--- a/tests/Unit/ResponseTest.php
+++ b/tests/Unit/ResponseTest.php
@@ -1,5 +1,7 @@
 <?php
 
+declare(strict_types=1);
+
 use Fetch\Http\Response;
 use GuzzleHttp\Psr7\Response as GuzzleResponse;