diff --git a/tests/Channels/MailChannelTest.php b/tests/Channels/MailChannelTest.php
index 4a31e76..443448b 100644
--- a/tests/Channels/MailChannelTest.php
+++ b/tests/Channels/MailChannelTest.php
@@ -15,14 +15,14 @@
  */
 
 use Guanguans\LaravelExceptionNotify\ExceptionNotifyManager;
+use Guanguans\LaravelExceptionNotify\Exceptions\InvalidArgumentException;
 use Guanguans\LaravelExceptionNotify\Mail\ReportExceptionMail;
 use Illuminate\Support\Facades\Mail;
 
 it('will throw `InvalidArgumentException`', function (): void {
-    config()->set('exception-notify.channels.mail.extender', null);
-
+    config()->set('exception-notify.channels.mail.extender');
     $this->app->make(ExceptionNotifyManager::class)->driver('mail');
-})->group(__DIR__, __FILE__)->throws(\Guanguans\LaravelExceptionNotify\Exceptions\InvalidArgumentException::class);
+})->group(__DIR__, __FILE__)->throws(InvalidArgumentException::class);
 
 it('will throw `TransportException`', function (): void {
     config()->set(
diff --git a/tests/Channels/NotifyChannelTest.php b/tests/Channels/NotifyChannelTest.php
index 36d9af0..8c7a3d5 100644
--- a/tests/Channels/NotifyChannelTest.php
+++ b/tests/Channels/NotifyChannelTest.php
@@ -16,6 +16,7 @@
 
 use Guanguans\LaravelExceptionNotify\Channels\NotifyChannel;
 use Guanguans\LaravelExceptionNotify\ExceptionNotifyManager;
+use Guanguans\LaravelExceptionNotify\Exceptions\InvalidArgumentException;
 use Illuminate\Config\Repository;
 use Psr\Http\Message\ResponseInterface;
 
@@ -25,7 +26,7 @@
             'extender' => null,
         ],
     ]));
-})->group(__DIR__, __FILE__)->throws(\Guanguans\LaravelExceptionNotify\Exceptions\InvalidArgumentException::class);
+})->group(__DIR__, __FILE__)->throws(InvalidArgumentException::class);
 
 it('can report', function (): void {
     expect(app(ExceptionNotifyManager::class)->driver('bark'))
diff --git a/tests/Pest.php b/tests/Pest.php
index 9969ca6..3674c1d 100644
--- a/tests/Pest.php
+++ b/tests/Pest.php
@@ -16,8 +16,6 @@
  * @see https://github.com/guanguans/laravel-exception-notify
  */
 
-namespace Tests;
-
 use Guanguans\LaravelExceptionNotify\ExceptionNotifyManager;
 use Guanguans\LaravelExceptionNotify\Tests\TestCase;
 
diff --git a/tests/Pipes/PipeTest.php b/tests/Pipes/PipeTest.php
index 382436b..cb09785 100644
--- a/tests/Pipes/PipeTest.php
+++ b/tests/Pipes/PipeTest.php
@@ -17,6 +17,7 @@
 use Guanguans\LaravelExceptionNotify\CollectorManager;
 use Guanguans\LaravelExceptionNotify\Contracts\Collector;
 use Guanguans\LaravelExceptionNotify\Contracts\ExceptionAware;
+use Guanguans\LaravelExceptionNotify\Exceptions\RuntimeException;
 use Guanguans\LaravelExceptionNotify\Pipes\FixPrettyJsonPipe;
 use Illuminate\Pipeline\Pipeline;
 use Illuminate\Support\Collection;
@@ -28,7 +29,7 @@
             collect(app(CollectorManager::class))
                 ->transform(static function (Collector $collector): Collector {
                     if ($collector instanceof ExceptionAware) {
-                        $collector->setException(new \Guanguans\LaravelExceptionNotify\Exceptions\RuntimeException);
+                        $collector->setException(new RuntimeException);
                     }
 
                     return $collector;
diff --git a/tests/Support/ExceptionContextTest.php b/tests/Support/ExceptionContextTest.php
index a7de238..472a86b 100644
--- a/tests/Support/ExceptionContextTest.php
+++ b/tests/Support/ExceptionContextTest.php
@@ -15,10 +15,11 @@
  * @see https://github.com/guanguans/laravel-exception-notify
  */
 
+use Guanguans\LaravelExceptionNotify\Exceptions\RuntimeException;
 use Guanguans\LaravelExceptionNotify\Support\ExceptionContext;
 
 it('can get marked exception context', function (): void {
-    expect(ExceptionContext::getMarked(new \Guanguans\LaravelExceptionNotify\Exceptions\RuntimeException))->toBeArray();
+    expect(ExceptionContext::getMarked(new RuntimeException))->toBeArray();
 
     try {
         eval('throw new Exception("eval");');