diff --git a/tests/Constraints/InstanceOfAtLeastOne.php b/tests/Constraints/InstanceOfAtLeastOne.php
new file mode 100644
index 0000000..57f1da4
--- /dev/null
+++ b/tests/Constraints/InstanceOfAtLeastOne.php
@@ -0,0 +1,44 @@
+<?php
+
+namespace Ae3\LaravelLogsLayer\Tests\Constraints;
+
+use PHPUnit\Framework\Constraint\Constraint;
+
+class InstanceOfAtLeastOne extends Constraint
+{
+    /**
+     * @var string
+     */
+    protected string $expectedClass;
+
+    /**
+     * @param string $expectedClass
+     */
+    public function __construct(string $expectedClass)
+    {
+        parent::__construct();
+        $this->expectedClass = $expectedClass;
+    }
+
+    /**
+     * @param $other
+     * @return bool
+     */
+    public function matches($other): bool
+    {
+        foreach ($other as $item) {
+            if ($item instanceof $this->expectedClass) {
+                return true;
+            }
+        }
+        return false;
+    }
+
+    /**
+     * @return string
+     */
+    public function toString(): string
+    {
+        return "contains at least one instance of '{$this->expectedClass}'";
+    }
+}
\ No newline at end of file
diff --git a/tests/Unit/LogTraitTest.php b/tests/Unit/LogTraitTest.php
index 45c42a0..3b9773f 100644
--- a/tests/Unit/LogTraitTest.php
+++ b/tests/Unit/LogTraitTest.php
@@ -10,6 +10,7 @@ use Ae3\LaravelLogsLayer\app\Services\DiscordLogService;
 use Ae3\LaravelLogsLayer\app\Services\EmailLogService;
 use Ae3\LaravelLogsLayer\app\Services\LogstashLogService;
 use Ae3\LaravelLogsLayer\app\Traits\LogTrait;
+use Ae3\LaravelLogsLayer\Tests\Constraints\InstanceOfAtLeastOne;
 use Ae3\LaravelLogsLayer\Tests\TestCase;
 use Exception;
 use Mockery;
@@ -74,7 +75,7 @@ class LogTraitTest extends TestCase
      * @return void
      * @throws ReflectionException
      */
-    public function testLogServiceReturnsEmailLogServiceWhenDefaultIsDaily(): void
+    public function testLogServiceReturnsEmailLogServiceWhenDefaultIsEmail(): void
     {
         config(['logging.default' => 'email']);
         config(['logging.channels.stack.channels' => ['email']]);
@@ -85,6 +86,85 @@ class LogTraitTest extends TestCase
         $this->assertContainsOnlyInstancesOf(EmailLogService::class, $traitInstance->getLogServices());
     }
 
+    /**
+     * @return void
+     * @throws ReflectionException
+     */
+    public function testLogServiceReturnsAllLogServicesWhenDefaultIsStack(): void
+    {
+        config(['logging.default' => 'stack']);
+        config(['logging.channels.stack.channels' => ['logstash', 'daily', 'discord', 'email']]);
+
+        $traitInstance = $this->getMockForTrait(LogTrait::class);
+        $traitInstance->initializeLogServices();
+
+        $this->assertContainsInstanceOf(LogstashLogService::class, $traitInstance->getLogServices());
+        $this->assertContainsInstanceOf(DailyLogService::class, $traitInstance->getLogServices());
+        $this->assertContainsInstanceOf(DiscordLogService::class, $traitInstance->getLogServices());
+        $this->assertContainsInstanceOf(EmailLogService::class, $traitInstance->getLogServices());
+    }
+
+    /**
+     * @return void
+     * @throws ReflectionException
+     */
+    public function testLogServiceReturnsOnlyLogstashLogServiceWhenStackContainsOnlyLogstash(): void
+    {
+        config(['logging.default' => 'stack']);
+        config(['logging.channels.stack.channels' => ['logstash']]);
+
+        $traitInstance = $this->getMockForTrait(LogTrait::class);
+        $traitInstance->initializeLogServices();
+
+        $this->assertContainsOnlyInstancesOf(LogstashLogService::class, $traitInstance->getLogServices());
+    }
+
+    /**
+     * @return void
+     * @throws ReflectionException
+     */
+    public function testLogServiceReturnsOnlyDailyLogServiceWhenStackContainsOnlyDaily(): void
+    {
+        config(['logging.default' => 'stack']);
+        config(['logging.channels.stack.channels' => ['daily']]);
+
+        $traitInstance = $this->getMockForTrait(LogTrait::class);
+        $traitInstance->initializeLogServices();
+
+        $this->assertContainsOnlyInstancesOf(DailyLogService::class, $traitInstance->getLogServices());
+    }
+
+    /**
+     * @return void
+     * @throws ReflectionException
+     */
+    public function testLogServiceReturnsOnlyDiscordLogServiceWhenStackContainsOnlyDiscord(): void
+    {
+        config(['logging.default' => 'stack']);
+        config(['logging.channels.stack.channels' => ['discord']]);
+
+        $traitInstance = $this->getMockForTrait(LogTrait::class);
+        $traitInstance->initializeLogServices();
+
+        $this->assertContainsOnlyInstancesOf(DiscordLogService::class, $traitInstance->getLogServices());
+    }
+
+    /**
+     * @return void
+     * @throws ReflectionException
+     */
+    public function testLogServiceReturnsOnlyEmailLogServiceWhenStackContainsOnlyEmail(): void
+    {
+        config(['logging.default' => 'stack']);
+        config(['logging.channels.stack.channels' => ['email']]);
+
+        $traitInstance = $this->getMockForTrait(LogTrait::class);
+        $traitInstance->initializeLogServices();
+
+        $this->assertContainsOnlyInstancesOf(EmailLogService::class, $traitInstance->getLogServices());
+    }
+
+
     /**
      * @return void
      * @throws InvalidArgumentException
@@ -155,4 +235,19 @@ class LogTraitTest extends TestCase
         // Verificando se o conteúdo esperado está presente no arquivo
         $this->assertStringContainsString($expectedContent, $logContent);
     }
+
+    /**
+     * @param string $className
+     * @param iterable $haystack
+     * @param string $message
+     * @return void
+     */
+    public static function assertContainsInstanceOf(string $className, iterable $haystack, string $message = ''): void
+    {
+        static::assertThat(
+            $haystack,
+            new InstanceOfAtLeastOne($className),
+            $message
+        );
+    }
 }
\ No newline at end of file