diff --git a/src/Symfony/Component/Notifier/Bridge/LightSms/Tests/LightSmsTransportFactoryTest.php b/src/Symfony/Component/Notifier/Bridge/LightSms/Tests/LightSmsTransportFactoryTest.php
new file mode 100644
index 0000000000..c85b7706c4
--- /dev/null
+++ b/src/Symfony/Component/Notifier/Bridge/LightSms/Tests/LightSmsTransportFactoryTest.php
@@ -0,0 +1,47 @@
+<?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\Component\Notifier\Bridge\LightSms\Tests;
+
+use Symfony\Component\Notifier\Bridge\LightSms\LightSmsTransportFactory;
+use Symfony\Component\Notifier\Test\TransportFactoryTestCase;
+use Symfony\Component\Notifier\Transport\TransportFactoryInterface;
+
+final class LightSmsTransportFactoryTest extends TransportFactoryTestCase
+{
+    /**
+     * @return LightSmsTransportFactory
+     */
+    public function createFactory(): TransportFactoryInterface
+    {
+        return new LightSmsTransportFactory();
+    }
+
+    public function createProvider(): iterable
+    {
+        yield [
+            'lightsms://host.test?phone=0611223344',
+            'lightsms://accountSid:authToken@host.test?phone=0611223344',
+        ];
+    }
+
+    public function supportsProvider(): iterable
+    {
+        yield [true, 'lightsms://login:token@default?phone=37061234567'];
+        yield [false, 'somethingElse://login:token@default?phone=37061234567'];
+    }
+
+    public function unsupportedSchemeProvider(): iterable
+    {
+        yield ['somethingElse://accountSid:authToken@default?from=37061234567'];
+        yield ['somethingElse://accountSid:authToken@default']; // missing "phone" option
+    }
+}
diff --git a/src/Symfony/Component/Notifier/Bridge/LightSms/Tests/LightSmsTransportTest.php b/src/Symfony/Component/Notifier/Bridge/LightSms/Tests/LightSmsTransportTest.php
new file mode 100644
index 0000000000..2082458d33
--- /dev/null
+++ b/src/Symfony/Component/Notifier/Bridge/LightSms/Tests/LightSmsTransportTest.php
@@ -0,0 +1,47 @@
+<?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\Component\Notifier\Bridge\LightSms\Tests;
+
+use Symfony\Component\Notifier\Bridge\LightSms\LightSmsTransport;
+use Symfony\Component\Notifier\Message\ChatMessage;
+use Symfony\Component\Notifier\Message\MessageInterface;
+use Symfony\Component\Notifier\Message\SmsMessage;
+use Symfony\Component\Notifier\Test\TransportTestCase;
+use Symfony\Component\Notifier\Transport\TransportInterface;
+use Symfony\Contracts\HttpClient\HttpClientInterface;
+
+final class LightSmsTransportTest extends TransportTestCase
+{
+    /**
+     * @return LightSmsTransport
+     */
+    public function createTransport(?HttpClientInterface $client = null): TransportInterface
+    {
+        return new LightSmsTransport('accountSid', 'authToken', 'from', $client ?: $this->createMock(HttpClientInterface::class));
+    }
+
+    public function toStringProvider(): iterable
+    {
+        yield ['lightsms://www.lightsms.com/external/get/send.php?phone=from', $this->createTransport()];
+    }
+
+    public function supportedMessagesProvider(): iterable
+    {
+        yield [new SmsMessage('0611223344', 'Hello!')];
+    }
+
+    public function unsupportedMessagesProvider(): iterable
+    {
+        yield [new ChatMessage('Hello!')];
+        yield [$this->createMock(MessageInterface::class)];
+    }
+}