diff --git a/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md b/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md
index cf66d7ef1b113..9b14be1b5c725 100644
--- a/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md
+++ b/src/Symfony/Bundle/FrameworkBundle/CHANGELOG.md
@@ -4,6 +4,7 @@ CHANGELOG
 6.4
 ---
 
+ * Add `LoggerAssertionsTrait`
  * Add `AbstractController::renderBlock()` and `renderBlockView()`
  * Add native return type to `Translator` and to `Application::reset()`
  * Deprecate the integration of Doctrine annotations, either uninstall the `doctrine/annotations` package or disable the integration by setting `framework.annotations` to `false`
diff --git a/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php b/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php
index 8d27b757f14f1..1240d1ad1152d 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php
+++ b/src/Symfony/Bundle/FrameworkBundle/Test/KernelTestCase.php
@@ -25,6 +25,7 @@
  */
 abstract class KernelTestCase extends TestCase
 {
+    use LoggerAssertionsTrait;
     use MailerAssertionsTrait;
     use NotificationAssertionsTrait;
 
diff --git a/src/Symfony/Bundle/FrameworkBundle/Test/LoggerAssertionsTrait.php b/src/Symfony/Bundle/FrameworkBundle/Test/LoggerAssertionsTrait.php
new file mode 100644
index 0000000000000..8d6dd579bbeda
--- /dev/null
+++ b/src/Symfony/Bundle/FrameworkBundle/Test/LoggerAssertionsTrait.php
@@ -0,0 +1,64 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bundle\FrameworkBundle\Test;
+
+use Monolog\Handler\TestHandler;
+use Monolog\Logger;
+use Monolog\LogRecord;
+
+trait LoggerAssertionsTrait
+{
+    public static function assertLogExists(string $expectedLog, string $level = Logger::DEBUG): void
+    {
+        self::ensureMonologHandlerIsAvailable();
+
+        /** @var TestHandler $logger */
+        $logger = self::getContainer()->get('monolog.handler.test');
+
+        self::assertTrue($logger->hasRecordThatPasses(
+            function (array|LogRecord $record) use ($expectedLog) {
+                return $record['message'] === $expectedLog;
+            },
+            $level,
+        ));
+    }
+
+    public static function assertLogMatches(string $expectedRegex, string $level = Logger::DEBUG): void
+    {
+        self::ensureMonologHandlerIsAvailable();
+
+        /** @var TestHandler $logger */
+        $logger = self::getContainer()->get('monolog.handler.test');
+
+        self::assertTrue($logger->hasRecordThatMatches($expectedRegex, $level));
+    }
+
+    public static function assertLogContains(string $expectedLog, string $level = Logger::DEBUG): void
+    {
+        self::ensureMonologHandlerIsAvailable();
+
+        /** @var TestHandler $logger */
+        $logger = self::getContainer()->get('monolog.handler.test');
+
+        self::assertTrue($logger->hasRecordThatContains($expectedLog, $level));
+    }
+
+    /**
+     * @internal
+     */
+    private static function ensureMonologHandlerIsAvailable(): void
+    {
+        if (!self::getContainer()->has('monolog.handler.test')) {
+            self::fail('The "monolog.handler.test" service is not available. Try registering the service "Monolog\Handler\TestHandler" as "monolog.handler.test" in your test configuration.');
+        }
+    }
+}
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/LoggerController.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/LoggerController.php
new file mode 100644
index 0000000000000..3694ed77b394f
--- /dev/null
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Controller/LoggerController.php
@@ -0,0 +1,27 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Controller;
+
+use Psr\Log\LoggerInterface;
+use Symfony\Component\HttpFoundation\Response;
+
+final class LoggerController
+{
+    public function index(LoggerInterface $logger)
+    {
+        $logger->debug('test1_'.__CLASS__);
+        $logger->debug('test2_'.__CLASS__);
+        $logger->debug('test3_'.__CLASS__);
+
+        return new Response();
+    }
+}
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Logger/TestLogger.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Logger/TestLogger.php
new file mode 100644
index 0000000000000..e0527cc04cb83
--- /dev/null
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Logger/TestLogger.php
@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Logger;
+
+use Monolog\Logger;
+
+class TestLogger extends Logger
+{
+    public array $logs = [];
+
+    public function __construct($handler)
+    {
+        parent::__construct(__CLASS__, [$handler]);
+    }
+
+    public function log($level, $message, array $context = []): void
+    {
+        $this->logs[] = [
+            'level' => $level,
+            'message' => (string) $message,
+            'context' => $context,
+        ];
+    }
+}
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Logger/TestLoggerWithoutHandler.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Logger/TestLoggerWithoutHandler.php
new file mode 100644
index 0000000000000..18d4371c2bedb
--- /dev/null
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Logger/TestLoggerWithoutHandler.php
@@ -0,0 +1,33 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Logger;
+
+use Monolog\Logger;
+
+class TestLoggerWithoutHandler extends Logger
+{
+    public array $logs = [];
+
+    public function __construct()
+    {
+        parent::__construct(__CLASS__);
+    }
+
+    public function log($level, $message, array $context = []): void
+    {
+        $this->logs[] = [
+            'level' => $level,
+            'message' => (string) $message,
+            'context' => $context,
+        ];
+    }
+}
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Resources/config/routing.yml b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Resources/config/routing.yml
index 5630ed621048f..8907b65102565 100644
--- a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Resources/config/routing.yml
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/Bundle/TestBundle/Resources/config/routing.yml
@@ -68,3 +68,7 @@ uid:
 send_notification:
     path:     /send_notification
     defaults: { _controller: Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Controller\NotificationController::indexAction }
+
+log:
+    path:     /log
+    defaults: { _controller: Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Controller\LoggerController::index }
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/LoggerTest.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/LoggerTest.php
new file mode 100644
index 0000000000000..fb9a52d86d074
--- /dev/null
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/LoggerTest.php
@@ -0,0 +1,51 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Symfony\Bundle\FrameworkBundle\Tests\Functional;
+
+use PHPUnit\Framework\AssertionFailedError;
+
+final class LoggerTest extends AbstractWebTestCase
+{
+    public function testLoggerAssertion()
+    {
+        $client = $this->createClient(['test_case' => 'Logger', 'root_config' => 'config.yml', 'debug' => true]);
+        $client->request('GET', '/log');
+
+        $this->assertLogExists('test1_Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Controller\LoggerController');
+        $this->assertLogMatches('/(test2_).*(LoggerController)/');
+        $this->assertLogContains('test3');
+    }
+
+    public function testLoggerAssertionWithoutTestHandler()
+    {
+        $client = $this->createClient(['test_case' => 'LoggerWithoutHandler', 'root_config' => 'config.yml', 'debug' => true]);
+        $client->request('GET', '/log');
+
+        try {
+            $this->assertLogExists('test1_Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Controller\LoggerController');
+        } catch (AssertionFailedError $e) {
+            $this->assertSame('The "monolog.handler.test" service is not available. Try registering the service "Monolog\Handler\TestHandler" as "monolog.handler.test" in your test configuration.', $e->getMessage());
+        }
+
+        try {
+            $this->assertLogMatches('/(test2_).*(LoggerController)/');
+        } catch (AssertionFailedError $e) {
+            $this->assertSame('The "monolog.handler.test" service is not available. Try registering the service "Monolog\Handler\TestHandler" as "monolog.handler.test" in your test configuration.', $e->getMessage());
+        }
+
+        try {
+            $this->assertLogContains('test3');
+        } catch (AssertionFailedError $e) {
+            $this->assertSame('The "monolog.handler.test" service is not available. Try registering the service "Monolog\Handler\TestHandler" as "monolog.handler.test" in your test configuration.', $e->getMessage());
+        }
+    }
+}
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Logger/bundles.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Logger/bundles.php
new file mode 100644
index 0000000000000..15ff182c6fed5
--- /dev/null
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Logger/bundles.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
+use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\TestBundle;
+
+return [
+    new FrameworkBundle(),
+    new TestBundle(),
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Logger/config.yml b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Logger/config.yml
new file mode 100644
index 0000000000000..c91beb5873782
--- /dev/null
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Logger/config.yml
@@ -0,0 +1,6 @@
+imports:
+    - { resource: ../config/default.yml }
+    - { resource: services.yml }
+
+framework:
+    profiler: ~
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Logger/routing.yml b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Logger/routing.yml
new file mode 100644
index 0000000000000..8d3bcd42ec8d5
--- /dev/null
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Logger/routing.yml
@@ -0,0 +1,2 @@
+_loggertest_bundle:
+    resource: '@TestBundle/Resources/config/routing.yml'
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Logger/services.yml b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Logger/services.yml
new file mode 100644
index 0000000000000..aea1942fb5572
--- /dev/null
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/Logger/services.yml
@@ -0,0 +1,13 @@
+services:
+    _defaults:
+        public: true
+
+    Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Controller\LoggerController:
+        tags: ['controller.service_arguments']
+
+    monolog.handler.test:
+        class: Monolog\Handler\TestHandler
+
+    logger:
+        class: Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Logger\TestLogger
+        arguments: ['@monolog.handler.test']
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/LoggerWithoutHandler/bundles.php b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/LoggerWithoutHandler/bundles.php
new file mode 100644
index 0000000000000..15ff182c6fed5
--- /dev/null
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/LoggerWithoutHandler/bundles.php
@@ -0,0 +1,18 @@
+<?php
+
+/*
+ * This file is part of the Symfony package.
+ *
+ * (c) Fabien Potencier <fabien@symfony.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+use Symfony\Bundle\FrameworkBundle\FrameworkBundle;
+use Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\TestBundle;
+
+return [
+    new FrameworkBundle(),
+    new TestBundle(),
+];
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/LoggerWithoutHandler/config.yml b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/LoggerWithoutHandler/config.yml
new file mode 100644
index 0000000000000..c91beb5873782
--- /dev/null
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/LoggerWithoutHandler/config.yml
@@ -0,0 +1,6 @@
+imports:
+    - { resource: ../config/default.yml }
+    - { resource: services.yml }
+
+framework:
+    profiler: ~
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/LoggerWithoutHandler/routing.yml b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/LoggerWithoutHandler/routing.yml
new file mode 100644
index 0000000000000..8d3bcd42ec8d5
--- /dev/null
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/LoggerWithoutHandler/routing.yml
@@ -0,0 +1,2 @@
+_loggertest_bundle:
+    resource: '@TestBundle/Resources/config/routing.yml'
diff --git a/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/LoggerWithoutHandler/services.yml b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/LoggerWithoutHandler/services.yml
new file mode 100644
index 0000000000000..7484719dbb5fe
--- /dev/null
+++ b/src/Symfony/Bundle/FrameworkBundle/Tests/Functional/app/LoggerWithoutHandler/services.yml
@@ -0,0 +1,9 @@
+services:
+    _defaults:
+        public: true
+
+    Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Controller\LoggerController:
+        tags: ['controller.service_arguments']
+
+    logger:
+        class: Symfony\Bundle\FrameworkBundle\Tests\Functional\Bundle\TestBundle\Logger\TestLoggerWithoutHandler