diff --git a/.github/workflows/run-tests.yml b/.github/workflows/run-tests.yml
index 2680a49..e1b6ddf 100644
--- a/.github/workflows/run-tests.yml
+++ b/.github/workflows/run-tests.yml
@@ -13,39 +13,39 @@ jobs:
       fail-fast: false
       matrix:
         os: [ubuntu-latest]
-        php: [8.0, 8.1, 8.2]
-        laravel: ['8.*', '9.*', '10.*', '11.*', '12.*']
+        php: ['8.1', '8.2', '8.3', '8.4', '8.5']
+        laravel: ['10.*', '11.*', '12.*', '13.*']
         stability: [prefer-stable]
         exclude:
-          - php: 8.0
-            laravel: 10.*
-          - php: 8.2
-            laravel: 8.*
-          - laravel: 11.*
-            php: 8.0
-          - laravel: 11.*
-            php: 8.1
-          - laravel: 12.*
-            php: 8.0
-          - laravel: 12.*
-            php: 8.1
+          - laravel: '10.*'
+            php: '8.4'
+          - laravel: '10.*'
+            php: '8.5'
+          - laravel: '11.*'
+            php: '8.1'
+          - laravel: '11.*'
+            php: '8.5'
+          - laravel: '12.*'
+            php: '8.1'
+          - laravel: '13.*'
+            php: '8.1'
+          - laravel: '13.*'
+            php: '8.2'
         include:
-          - laravel: 10.*
-            testbench: 8.*
-          - laravel: 9.*
-            testbench: 7.*
-          - laravel: 8.*
-            testbench: 6.23
-          - laravel: 11.*
-            testbench: 9.*
-          - laravel: 12.*
-            testbench: 10.*
+          - laravel: '10.*'
+            testbench: '8.*'
+          - laravel: '11.*'
+            testbench: '9.*'
+          - laravel: '12.*'
+            testbench: '10.*'
+          - laravel: '13.*'
+            testbench: '11.*'
 
     name: P${{ matrix.php }} - L${{ matrix.laravel }} - ${{ matrix.stability }} - ${{ matrix.os }}
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v2
+        uses: actions/checkout@v4
 
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
diff --git a/README.md b/README.md
index e50c4c4..0c29d89 100644
--- a/README.md
+++ b/README.md
@@ -36,14 +36,15 @@ The email service organizes emails into distinct inboxes for each application, e
 
 ![image](https://github.com/user-attachments/assets/6417907c-119d-43ac-9cf6-5638bafae24f)
 
+## Testing
 
-### Testing
+Inbound messages are parsed with [zbateson/mail-mime-parser](https://mail-mime-parser.org) (see the docs on [handling inbound email](https://docs.beyondco.de/laravel-mailbox/basic-usage/handling)). Run the package test suite with:
 
-``` bash
+```bash
 composer test
 ```
 
-### Changelog
+## Changelog
 
 Please see [CHANGELOG](CHANGELOG.md) for more information what has changed recently.
 
diff --git a/composer.json b/composer.json
index 44a1f50..a904a75 100644
--- a/composer.json
+++ b/composer.json
@@ -16,20 +16,19 @@
         }
     ],
     "require": {
-        "php": "^8.0",
-        "illuminate/container": "^6.0|^7.0|^8.0|^9.0|^10.0|^11.0|^12.0",
-        "illuminate/database": "^6.0|^7.0|^8.0|^9.0|^10.0|^11.0|^12.0",
-        "illuminate/log": "^6.0|^7.0|^8.0|^9.0|^10.0|^11.0|^12.0",
-        "illuminate/routing": "^6.0|^7.0|^8.0|^9.0|^10.0|^11.0|^12.0",
-        "illuminate/support": "^6.0|^7.0|^8.0|^9.0|^10.0|^11.0|^12.0",
+        "php": "^8.1",
+        "illuminate/container": "^10.0|^11.0|^12.0|^13.0",
+        "illuminate/database": "^10.0|^11.0|^12.0|^13.0",
+        "illuminate/log": "^10.0|^11.0|^12.0|^13.0",
+        "illuminate/routing": "^10.0|^11.0|^12.0|^13.0",
+        "illuminate/support": "^10.0|^11.0|^12.0|^13.0",
         "willdurand/email-reply-parser": "^2.8",
-        "zbateson/mail-mime-parser": "^1.1|^2.4|^3.0"
+        "zbateson/mail-mime-parser": "^2.4|^3.0|^4.0"
     },
     "require-dev": {
-        "laminas/laminas-mail": "^2.13",
         "mockery/mockery": "^1.2",
-        "orchestra/testbench": "^4.0|^5.0|^7.0|^8.0|^9.0|^10.0",
-        "phpunit/phpunit": "^7.0|^8.0|^9.3|^10.5|^11.5.3"
+        "orchestra/testbench": "^8.0|^9.0|^10.0|^11.0",
+        "phpunit/phpunit": "^10.5|^11.0|^12.0"
     },
     "autoload": {
         "psr-4": {
diff --git a/tests/Console/CleanEmailsTest.php b/tests/Console/CleanEmailsTest.php
index 5f18272..4c994da 100644
--- a/tests/Console/CleanEmailsTest.php
+++ b/tests/Console/CleanEmailsTest.php
@@ -8,6 +8,7 @@
 use Carbon\Carbon;
 use Illuminate\Support\Collection;
 use Illuminate\Support\Str;
+use PHPUnit\Framework\Attributes\Test;
 
 class CleanEmailsTest extends TestCase
 {
@@ -20,7 +21,7 @@ public function setUp(): void
         $this->app['config']->set('mailbox.store_incoming_emails_for_days', 31);
     }
 
-    /** @test */
+    #[Test]
     public function it_can_clean_the_statistics()
     {
         Collection::times(200)->each(function (int $index) {
@@ -41,7 +42,7 @@ public function it_can_clean_the_statistics()
         $this->assertCount(0, InboundEmail::where('created_at', '<', $cutOffDate)->get());
     }
 
-    /** @test */
+    #[Test]
     public function it_errors_if_max_age_inf()
     {
         $this->app['config']->set('mailbox.store_incoming_emails_for_days', INF);
diff --git a/tests/Controllers/MailgunTest.php b/tests/Controllers/MailgunTest.php
index af10733..0571b79 100644
--- a/tests/Controllers/MailgunTest.php
+++ b/tests/Controllers/MailgunTest.php
@@ -3,6 +3,7 @@
 namespace BeyondCode\Mailbox\Tests\Controllers;
 
 use BeyondCode\Mailbox\Tests\TestCase;
+use PHPUnit\Framework\Attributes\Test;
 
 class MailgunTest extends TestCase
 {
@@ -13,7 +14,7 @@ protected function getEnvironmentSetUp($app)
         $app['config']['mailbox.driver'] = 'mailgun';
     }
 
-    /** @test */
+    #[Test]
     public function it_verifies_mailgun_signatures()
     {
         $this->post('/laravel-mailbox/mailgun/mime', [
@@ -38,7 +39,7 @@ public function it_verifies_mailgun_signatures()
         ])->assertStatus(200);
     }
 
-    /** @test */
+    #[Test]
     public function it_verifies_fresh_timestamps()
     {
         $timestamp = now()->subMinutes(5)->timestamp;
diff --git a/tests/Controllers/PostmarkTest.php b/tests/Controllers/PostmarkTest.php
index 2e7d4f8..a0fa3fd 100644
--- a/tests/Controllers/PostmarkTest.php
+++ b/tests/Controllers/PostmarkTest.php
@@ -3,6 +3,7 @@
 namespace BeyondCode\Mailbox\Tests\Controllers;
 
 use BeyondCode\Mailbox\Tests\TestCase;
+use PHPUnit\Framework\Attributes\Test;
 
 class PostmarkTest extends TestCase
 {
@@ -13,7 +14,7 @@ protected function getEnvironmentSetUp($app)
         $app['config']['mailbox.driver'] = 'postmark';
     }
 
-    /** @test */
+    #[Test]
     public function it_expects_to_receive_raw_email_field()
     {
         $this->withoutMiddleware();
diff --git a/tests/Drivers/LogTest.php b/tests/Drivers/LogTest.php
index 4cdb5a2..b39f954 100644
--- a/tests/Drivers/LogTest.php
+++ b/tests/Drivers/LogTest.php
@@ -7,6 +7,7 @@
 use BeyondCode\Mailbox\Tests\TestCase;
 use Illuminate\Mail\Mailable;
 use Illuminate\Support\Facades\Mail;
+use PHPUnit\Framework\Attributes\Test;
 
 class LogTest extends TestCase
 {
@@ -18,7 +19,7 @@ protected function getEnvironmentSetUp($app)
         $app['config']['mailbox.driver'] = 'log';
     }
 
-    /** @test */
+    #[Test]
     public function it_catches_logged_mails()
     {
         Mailbox::from('{name}@beyondco.de', function (InboundEmail $email, $name) {
diff --git a/tests/InboundEmailTest.php b/tests/InboundEmailTest.php
index 8a54b9a..ef8156b 100644
--- a/tests/InboundEmailTest.php
+++ b/tests/InboundEmailTest.php
@@ -6,6 +6,7 @@
 use BeyondCode\Mailbox\InboundEmail;
 use Illuminate\Mail\Mailable;
 use Illuminate\Support\Facades\Mail;
+use PHPUnit\Framework\Attributes\Test;
 
 class InboundEmailTest extends TestCase
 {
@@ -17,7 +18,7 @@ protected function getEnvironmentSetUp($app)
         $app['config']['mailbox.driver'] = 'log';
     }
 
-    /** @test */
+    #[Test]
     public function it_stores_inbound_emails()
     {
         Mailbox::to('someone@beyondco.de', function ($email) {
@@ -29,7 +30,7 @@ public function it_stores_inbound_emails()
         $this->assertSame(1, InboundEmail::query()->count());
     }
 
-    /** @test */
+    #[Test]
     public function it_stores_all_inbound_emails()
     {
         $this->app['config']['mailbox.only_store_matching_emails'] = false;
@@ -43,7 +44,7 @@ public function it_stores_all_inbound_emails()
         $this->assertSame(2, InboundEmail::query()->count());
     }
 
-    /** @test */
+    #[Test]
     public function it_can_use_fallbacks()
     {
         Mailbox::fallback(function (InboundEmail $email) {
@@ -57,7 +58,7 @@ public function it_can_use_fallbacks()
         Mail::assertSent(ReplyMail::class);
     }
 
-    /** @test */
+    #[Test]
     public function it_can_use_catchall()
     {
         Mailbox::to('someone@beyondco.de', function ($email) {
@@ -74,7 +75,7 @@ public function it_can_use_catchall()
         Mail::assertSent(ReplyMail::class);
     }
 
-    /** @test */
+    #[Test]
     public function it_stores_inbound_emails_with_catchall()
     {
         Mailbox::catchAll(function ($email) {
@@ -86,7 +87,7 @@ public function it_stores_inbound_emails_with_catchall()
         $this->assertSame(2, InboundEmail::query()->count());
     }
 
-    /** @test */
+    #[Test]
     public function it_stores_inbound_emails_with_fallback()
     {
         Mailbox::fallback(function ($email) {
@@ -98,7 +99,7 @@ public function it_stores_inbound_emails_with_fallback()
         $this->assertSame(2, InboundEmail::query()->count());
     }
 
-    /** @test */
+    #[Test]
     public function it_stores_inbound_emails_with_fallback_and_catchall_only_once()
     {
         Mailbox::fallback(function ($email) {
@@ -113,7 +114,7 @@ public function it_stores_inbound_emails_with_fallback_and_catchall_only_once()
         $this->assertSame(2, InboundEmail::query()->count());
     }
 
-    /** @test */
+    #[Test]
     public function it_does_not_store_inbound_emails_if_configured()
     {
         $this->app['config']['mailbox.store_incoming_emails_for_days'] = 0;
@@ -127,7 +128,7 @@ public function it_does_not_store_inbound_emails_if_configured()
         $this->assertSame(0, InboundEmail::query()->count());
     }
 
-    /** @test */
+    #[Test]
     public function it_can_reply_to_mails()
     {
         Mailbox::from('example@beyondco.de', function (InboundEmail $email) {
@@ -141,7 +142,7 @@ public function it_can_reply_to_mails()
         Mail::assertSent(ReplyMail::class);
     }
 
-    /** @test */
+    #[Test]
     public function it_uses_the_configured_model()
     {
         $this->app['config']['mailbox.model'] = ExtendedInboundEmail::class;
diff --git a/tests/MailboxRouteCollectionTest.php b/tests/MailboxRouteCollectionTest.php
index fa3c027..d8d5fde 100644
--- a/tests/MailboxRouteCollectionTest.php
+++ b/tests/MailboxRouteCollectionTest.php
@@ -5,11 +5,11 @@
 use BeyondCode\Mailbox\InboundEmail;
 use BeyondCode\Mailbox\Routing\Route;
 use BeyondCode\Mailbox\Routing\RouteCollection;
-use Laminas\Mail\Message as TestMail;
+use PHPUnit\Framework\Attributes\Test;
 
 class MailboxRouteCollectionTest extends TestCase
 {
-    /** @test */
+    #[Test]
     public function it_returns_all_matching_mailbox_routes()
     {
         $collection = new RouteCollection();
@@ -18,7 +18,7 @@ public function it_returns_all_matching_mailbox_routes()
         $collection->add(new Route(Route::FROM, '{from}@beyondco.de', ''));
         $collection->add(new Route(Route::FROM, 'different@laravel.com', ''));
 
-        $testMail = (new TestMail())
+        $testMail = (new TestMimeMessage())
             ->setFrom('hello@beyondco.de');
 
         $message = new InboundEmail(['message' => $testMail->toString()]);
diff --git a/tests/MailboxRouteTest.php b/tests/MailboxRouteTest.php
index 5adfcd0..3d4b3c1 100644
--- a/tests/MailboxRouteTest.php
+++ b/tests/MailboxRouteTest.php
@@ -4,7 +4,8 @@
 
 use BeyondCode\Mailbox\InboundEmail;
 use BeyondCode\Mailbox\Routing\Route;
-use Laminas\Mail\Message as TestMail;
+use PHPUnit\Framework\Attributes\DataProvider;
+use PHPUnit\Framework\Attributes\Test;
 
 class MailboxRouteTest extends TestCase
 {
@@ -16,14 +17,11 @@ public static function emailDataProvider()
         ];
     }
 
-    /**
-     * @test
-     *
-     * @dataProvider emailDataProvider
-     */
+    #[Test]
+    #[DataProvider('emailDataProvider')]
     public function it_matches_from_mails($fromMail, $successfulPattern, $failingPattern)
     {
-        $testMail = (new TestMail())
+        $testMail = (new TestMimeMessage())
             ->setFrom($fromMail);
 
         $message = new InboundEmail(['message' => $testMail->toString()]);
@@ -35,14 +33,11 @@ public function it_matches_from_mails($fromMail, $successfulPattern, $failingPat
         $this->assertFalse($route->matches($message));
     }
 
-    /**
-     * @test
-     *
-     * @dataProvider emailDataProvider
-     */
+    #[Test]
+    #[DataProvider('emailDataProvider')]
     public function it_matches_to_mails($toMail, $successfulPattern, $failingPattern)
     {
-        $testMail = (new TestMail())
+        $testMail = (new TestMimeMessage())
             ->setTo($toMail);
 
         $message = new InboundEmail(['message' => $testMail->toString()]);
@@ -54,14 +49,11 @@ public function it_matches_to_mails($toMail, $successfulPattern, $failingPattern
         $this->assertFalse($route->matches($message));
     }
 
-    /**
-     * @test
-     *
-     * @dataProvider emailDataProvider
-     */
+    #[Test]
+    #[DataProvider('emailDataProvider')]
     public function it_matches_cc_mails($ccMail, $successfulPattern, $failingPattern)
     {
-        $testMail = (new TestMail())
+        $testMail = (new TestMimeMessage())
             ->setCc($ccMail);
 
         $message = new InboundEmail(['message' => $testMail->toString()]);
@@ -73,14 +65,11 @@ public function it_matches_cc_mails($ccMail, $successfulPattern, $failingPattern
         $this->assertFalse($route->matches($message));
     }
 
-    /**
-     * @test
-     *
-     * @dataProvider emailDataProvider
-     */
+    #[Test]
+    #[DataProvider('emailDataProvider')]
     public function it_matches_bcc_mails($bccMail, $successfulPattern, $failingPattern)
     {
-        $testMail = (new TestMail())
+        $testMail = (new TestMimeMessage())
             ->setBcc($bccMail);
 
         $message = new InboundEmail(['message' => $testMail->toString()]);
@@ -92,14 +81,11 @@ public function it_matches_bcc_mails($bccMail, $successfulPattern, $failingPatte
         $this->assertFalse($route->matches($message));
     }
 
-    /**
-     * @test
-     *
-     * @dataProvider subjectDataProvider
-     */
+    #[Test]
+    #[DataProvider('subjectDataProvider')]
     public function it_matches_subjects($subject, $successfulPattern, $failingPattern)
     {
-        $testMail = (new TestMail())
+        $testMail = (new TestMimeMessage())
             ->setSubject($subject);
 
         $message = new InboundEmail(['message' => $testMail->toString()]);
@@ -111,10 +97,10 @@ public function it_matches_subjects($subject, $successfulPattern, $failingPatter
         $this->assertFalse($route->matches($message));
     }
 
-    /** @test */
+    #[Test]
     public function it_matches_requirements()
     {
-        $testMail = (new TestMail())
+        $testMail = (new TestMimeMessage())
             ->setFrom('abc@domain.com');
 
         $message = new InboundEmail(['message' => $testMail->toString()]);
@@ -138,7 +124,7 @@ public static function subjectDataProvider()
         ];
     }
 
-    /** @test */
+    #[Test]
     public function it_returns_parameter_names()
     {
         $route = new Route(Route::FROM, 'someone@domain.com', 'SomeAction@handle');
@@ -160,10 +146,10 @@ public function it_returns_parameter_names()
         ], $route->parameterNames());
     }
 
-    /** @test */
+    #[Test]
     public function it_returns_parameter_values()
     {
-        $testMail = (new TestMail())
+        $testMail = (new TestMimeMessage())
             ->setFrom('my-email@foo.com')
             ->setSubject('ABC/DEF/GEH');
 
@@ -200,10 +186,10 @@ public function it_returns_parameter_values()
         ], $route->parameters());
     }
 
-    /** @test */
+    #[Test]
     public function it_runs_callables()
     {
-        $testMail = (new TestMail())
+        $testMail = (new TestMimeMessage())
             ->setFrom('marcel@beyondco.de');
 
         $message = new InboundEmail(['message' => $testMail->toString()]);
@@ -217,10 +203,10 @@ public function it_runs_callables()
         $route->run($message);
     }
 
-    /** @test */
+    #[Test]
     public function it_passes_parameters_to_callables()
     {
-        $testMail = (new TestMail())
+        $testMail = (new TestMimeMessage())
             ->setFrom('marcel@beyondco.de');
 
         $message = new InboundEmail(['message' => $testMail->toString()]);
diff --git a/tests/TestMimeMessage.php b/tests/TestMimeMessage.php
new file mode 100644
index 0000000..858ffdb
--- /dev/null
+++ b/tests/TestMimeMessage.php
@@ -0,0 +1,61 @@
+<?php
+
+namespace BeyondCode\Mailbox\Tests;
+
+/** Builds minimal MIME strings for route tests (inbound parsing uses zbateson/mail-mime-parser). */
+final class TestMimeMessage
+{
+    /** @var array<string, string> */
+    private array $headers = [];
+
+    public function setFrom(string $email): self
+    {
+        $this->headers['From'] = $email;
+
+        return $this;
+    }
+
+    public function setTo(string $email): self
+    {
+        $this->headers['To'] = $email;
+
+        return $this;
+    }
+
+    public function setCc(string $email): self
+    {
+        $this->headers['Cc'] = $email;
+
+        return $this;
+    }
+
+    public function setBcc(string $email): self
+    {
+        $this->headers['Bcc'] = $email;
+
+        return $this;
+    }
+
+    public function setSubject(string $subject): self
+    {
+        $this->headers['Subject'] = $subject;
+
+        return $this;
+    }
+
+    public function toString(): string
+    {
+        $lines = [];
+        foreach (['From', 'To', 'Cc', 'Bcc', 'Subject'] as $name) {
+            if (isset($this->headers[$name])) {
+                $lines[] = $name.': '.$this->headers[$name];
+            }
+        }
+        $lines[] = 'MIME-Version: 1.0';
+        $lines[] = 'Content-Type: text/plain; charset=UTF-8';
+        $lines[] = '';
+        $lines[] = '';
+
+        return implode("\r\n", $lines);
+    }
+}