diff --git a/src/Symfony/Component/Notifier/Bridge/FreeMobile/Tests/FreeMobileTransportFactoryTest.php b/src/Symfony/Component/Notifier/Bridge/FreeMobile/Tests/FreeMobileTransportFactoryTest.php
index 1bbe44398e..474bd131e8 100644
--- a/src/Symfony/Component/Notifier/Bridge/FreeMobile/Tests/FreeMobileTransportFactoryTest.php
+++ b/src/Symfony/Component/Notifier/Bridge/FreeMobile/Tests/FreeMobileTransportFactoryTest.php
@@ -19,7 +19,7 @@ use Symfony\Component\Notifier\Transport\Dsn;
 
 final class FreeMobileTransportFactoryTest extends TestCase
 {
-    public function testCreateWithDsn(): void
+    public function testCreateWithDsn()
     {
         $factory = $this->createFactory();
 
@@ -30,7 +30,7 @@ final class FreeMobileTransportFactoryTest extends TestCase
         $this->assertSame('freemobile://host.test?phone=0611223344', (string) $transport);
     }
 
-    public function testCreateWithNoPhoneThrowsMalformed(): void
+    public function testCreateWithNoPhoneThrowsMalformed()
     {
         $factory = $this->createFactory();
 
@@ -40,7 +40,7 @@ final class FreeMobileTransportFactoryTest extends TestCase
         $factory->create(Dsn::fromString($dsnIncomplete));
     }
 
-    public function testSupportsFreeMobileScheme(): void
+    public function testSupportsFreeMobileScheme()
     {
         $factory = $this->createFactory();
 
@@ -51,7 +51,7 @@ final class FreeMobileTransportFactoryTest extends TestCase
         $this->assertFalse($factory->supports(Dsn::fromString($dsnUnsupported)));
     }
 
-    public function testNonFreeMobileSchemeThrows(): void
+    public function testNonFreeMobileSchemeThrows()
     {
         $factory = $this->createFactory();
 
diff --git a/src/Symfony/Component/Notifier/Bridge/FreeMobile/Tests/FreeMobileTransportTest.php b/src/Symfony/Component/Notifier/Bridge/FreeMobile/Tests/FreeMobileTransportTest.php
index 88969304b1..c49a11c530 100644
--- a/src/Symfony/Component/Notifier/Bridge/FreeMobile/Tests/FreeMobileTransportTest.php
+++ b/src/Symfony/Component/Notifier/Bridge/FreeMobile/Tests/FreeMobileTransportTest.php
@@ -20,14 +20,14 @@ use Symfony\Contracts\HttpClient\HttpClientInterface;
 
 final class FreeMobileTransportTest extends TestCase
 {
-    public function testToStringContainsProperties(): void
+    public function testToStringContainsProperties()
     {
         $transport = $this->initTransport();
 
         $this->assertSame('freemobile://host.test?phone=0611223344', (string) $transport);
     }
 
-    public function testSupportsMessageInterface(): void
+    public function testSupportsMessageInterface()
     {
         $transport = $this->initTransport();
 
@@ -36,7 +36,7 @@ final class FreeMobileTransportTest extends TestCase
         $this->assertFalse($transport->supports($this->createMock(MessageInterface::class)));
     }
 
-    public function testSendNonSmsMessageThrowsException(): void
+    public function testSendNonSmsMessageThrowsException()
     {
         $transport = $this->initTransport();
 
@@ -45,7 +45,7 @@ final class FreeMobileTransportTest extends TestCase
         $transport->send($this->createMock(MessageInterface::class));
     }
 
-    public function testSendSmsMessageButInvalidPhoneThrowsException(): void
+    public function testSendSmsMessageButInvalidPhoneThrowsException()
     {
         $transport = $this->initTransport();
 
diff --git a/src/Symfony/Component/Notifier/Bridge/Slack/Tests/SlackTransportTest.php b/src/Symfony/Component/Notifier/Bridge/Slack/Tests/SlackTransportTest.php
index 100832efdd..8e690206ff 100644
--- a/src/Symfony/Component/Notifier/Bridge/Slack/Tests/SlackTransportTest.php
+++ b/src/Symfony/Component/Notifier/Bridge/Slack/Tests/SlackTransportTest.php
@@ -26,7 +26,7 @@ use Symfony\Contracts\HttpClient\ResponseInterface;
 
 final class SlackTransportTest extends TestCase
 {
-    public function testToStringContainsProperties(): void
+    public function testToStringContainsProperties()
     {
         $host = 'testHost';
         $path = 'testPath';
@@ -37,7 +37,7 @@ final class SlackTransportTest extends TestCase
         $this->assertSame(sprintf('slack://%s/%s', $host, $path), (string) $transport);
     }
 
-    public function testSupportsChatMessage(): void
+    public function testSupportsChatMessage()
     {
         $transport = new SlackTransport('testPath', $this->createMock(HttpClientInterface::class));
 
@@ -45,7 +45,7 @@ final class SlackTransportTest extends TestCase
         $this->assertFalse($transport->supports($this->createMock(MessageInterface::class)));
     }
 
-    public function testSendNonChatMessageThrows(): void
+    public function testSendNonChatMessageThrows()
     {
         $this->expectException(LogicException::class);
 
@@ -54,7 +54,7 @@ final class SlackTransportTest extends TestCase
         $transport->send($this->createMock(MessageInterface::class));
     }
 
-    public function testSendWithEmptyArrayResponseThrows(): void
+    public function testSendWithEmptyArrayResponseThrows()
     {
         $this->expectException(TransportException::class);
 
@@ -75,7 +75,7 @@ final class SlackTransportTest extends TestCase
         $transport->send(new ChatMessage('testMessage'));
     }
 
-    public function testSendWithErrorResponseThrows(): void
+    public function testSendWithErrorResponseThrows()
     {
         $this->expectException(TransportException::class);
         $this->expectExceptionMessage('testErrorCode');
@@ -98,7 +98,7 @@ final class SlackTransportTest extends TestCase
         $transport->send(new ChatMessage('testMessage'));
     }
 
-    public function testSendWithOptions(): void
+    public function testSendWithOptions()
     {
         $path = 'testPath';
         $message = 'testMessage';
@@ -126,7 +126,7 @@ final class SlackTransportTest extends TestCase
         $transport->send(new ChatMessage('testMessage'));
     }
 
-    public function testSendWithNotification(): void
+    public function testSendWithNotification()
     {
         $host = 'testHost';
         $message = 'testMessage';
@@ -161,7 +161,7 @@ final class SlackTransportTest extends TestCase
         $transport->send($chatMessage);
     }
 
-    public function testSendWithInvalidOptions(): void
+    public function testSendWithInvalidOptions()
     {
         $this->expectException(LogicException::class);
 
@@ -174,7 +174,7 @@ final class SlackTransportTest extends TestCase
         $transport->send(new ChatMessage('testMessage', $this->createMock(MessageOptionsInterface::class)));
     }
 
-    public function testSendWith200ResponseButNotOk(): void
+    public function testSendWith200ResponseButNotOk()
     {
         $host = 'testChannel';
         $message = 'testMessage';
diff --git a/src/Symfony/Component/Notifier/Bridge/Telegram/Tests/TelegramTransportFactoryTest.php b/src/Symfony/Component/Notifier/Bridge/Telegram/Tests/TelegramTransportFactoryTest.php
index c74d38f2f6..9299a283ef 100644
--- a/src/Symfony/Component/Notifier/Bridge/Telegram/Tests/TelegramTransportFactoryTest.php
+++ b/src/Symfony/Component/Notifier/Bridge/Telegram/Tests/TelegramTransportFactoryTest.php
@@ -19,7 +19,7 @@ use Symfony\Component\Notifier\Transport\Dsn;
 
 final class TelegramTransportFactoryTest extends TestCase
 {
-    public function testCreateWithDsn(): void
+    public function testCreateWithDsn()
     {
         $factory = new TelegramTransportFactory();
 
@@ -31,7 +31,7 @@ final class TelegramTransportFactoryTest extends TestCase
         $this->assertSame(sprintf('telegram://%s?channel=%s', $host, $channel), (string) $transport);
     }
 
-    public function testCreateWithNoPasswordThrowsMalformed(): void
+    public function testCreateWithNoPasswordThrowsMalformed()
     {
         $factory = new TelegramTransportFactory();
 
@@ -39,7 +39,7 @@ final class TelegramTransportFactoryTest extends TestCase
         $factory->create(Dsn::fromString(sprintf('telegram://%s@%s/?channel=%s', 'simpleToken', 'testHost', 'testChannel')));
     }
 
-    public function testCreateWithNoTokenThrowsMalformed(): void
+    public function testCreateWithNoTokenThrowsMalformed()
     {
         $factory = new TelegramTransportFactory();
 
@@ -47,7 +47,7 @@ final class TelegramTransportFactoryTest extends TestCase
         $factory->create(Dsn::fromString(sprintf('telegram://%s/?channel=%s', 'testHost', 'testChannel')));
     }
 
-    public function testSupportsTelegramScheme(): void
+    public function testSupportsTelegramScheme()
     {
         $factory = new TelegramTransportFactory();
 
@@ -55,7 +55,7 @@ final class TelegramTransportFactoryTest extends TestCase
         $this->assertFalse($factory->supports(Dsn::fromString('somethingElse://host/?channel=testChannel')));
     }
 
-    public function testNonTelegramSchemeThrows(): void
+    public function testNonTelegramSchemeThrows()
     {
         $factory = new TelegramTransportFactory();
 
diff --git a/src/Symfony/Component/Notifier/Bridge/Telegram/Tests/TelegramTransportTest.php b/src/Symfony/Component/Notifier/Bridge/Telegram/Tests/TelegramTransportTest.php
index ec5f345356..72c7d4d479 100644
--- a/src/Symfony/Component/Notifier/Bridge/Telegram/Tests/TelegramTransportTest.php
+++ b/src/Symfony/Component/Notifier/Bridge/Telegram/Tests/TelegramTransportTest.php
@@ -24,7 +24,7 @@ use Symfony\Contracts\HttpClient\ResponseInterface;
 
 final class TelegramTransportTest extends TestCase
 {
-    public function testToStringContainsProperties(): void
+    public function testToStringContainsProperties()
     {
         $channel = 'testChannel';
 
@@ -34,7 +34,7 @@ final class TelegramTransportTest extends TestCase
         $this->assertSame(sprintf('telegram://%s?channel=%s', 'testHost', $channel), (string) $transport);
     }
 
-    public function testSupportsChatMessage(): void
+    public function testSupportsChatMessage()
     {
         $transport = new TelegramTransport('testToken', 'testChannel', $this->createMock(HttpClientInterface::class));
 
@@ -42,7 +42,7 @@ final class TelegramTransportTest extends TestCase
         $this->assertFalse($transport->supports($this->createMock(MessageInterface::class)));
     }
 
-    public function testSendNonChatMessageThrows(): void
+    public function testSendNonChatMessageThrows()
     {
         $this->expectException(LogicException::class);
         $transport = new TelegramTransport('testToken', 'testChannel', $this->createMock(HttpClientInterface::class));
@@ -50,7 +50,7 @@ final class TelegramTransportTest extends TestCase
         $transport->send($this->createMock(MessageInterface::class));
     }
 
-    public function testSendWithErrorResponseThrows(): void
+    public function testSendWithErrorResponseThrows()
     {
         $this->expectException(TransportException::class);
         $this->expectExceptionMessageMatches('/testDescription.+testErrorCode/');
@@ -72,7 +72,7 @@ final class TelegramTransportTest extends TestCase
         $transport->send(new ChatMessage('testMessage'));
     }
 
-    public function testSendWithOptions(): void
+    public function testSendWithOptions()
     {
         $channel = 'testChannel';
 
@@ -101,7 +101,7 @@ final class TelegramTransportTest extends TestCase
         $transport->send(new ChatMessage('testMessage'));
     }
 
-    public function testSendWithChannelOverride(): void
+    public function testSendWithChannelOverride()
     {
         $channelOverride = 'channelOverride';
 
diff --git a/src/Symfony/Component/Notifier/Bridge/Twilio/Tests/TwilioTransportFactoryTest.php b/src/Symfony/Component/Notifier/Bridge/Twilio/Tests/TwilioTransportFactoryTest.php
index 9ff62a20fa..2b6f67eea5 100644
--- a/src/Symfony/Component/Notifier/Bridge/Twilio/Tests/TwilioTransportFactoryTest.php
+++ b/src/Symfony/Component/Notifier/Bridge/Twilio/Tests/TwilioTransportFactoryTest.php
@@ -19,7 +19,7 @@ use Symfony\Component\Notifier\Transport\Dsn;
 
 final class TwilioTransportFactoryTest extends TestCase
 {
-    public function testCreateWithDsn(): void
+    public function testCreateWithDsn()
     {
         $factory = $this->createFactory();
 
@@ -30,7 +30,7 @@ final class TwilioTransportFactoryTest extends TestCase
         $this->assertSame('twilio://host.test?from=0611223344', (string) $transport);
     }
 
-    public function testCreateWithNoFromThrowsMalformed(): void
+    public function testCreateWithNoFromThrowsMalformed()
     {
         $factory = $this->createFactory();
 
@@ -40,7 +40,7 @@ final class TwilioTransportFactoryTest extends TestCase
         $factory->create(Dsn::fromString($dsnIncomplete));
     }
 
-    public function testSupportsTwilioScheme(): void
+    public function testSupportsTwilioScheme()
     {
         $factory = $this->createFactory();
 
@@ -51,7 +51,7 @@ final class TwilioTransportFactoryTest extends TestCase
         $this->assertFalse($factory->supports(Dsn::fromString($dsnUnsupported)));
     }
 
-    public function testNonTwilioSchemeThrows(): void
+    public function testNonTwilioSchemeThrows()
     {
         $factory = $this->createFactory();
 
diff --git a/src/Symfony/Component/Notifier/Bridge/Twilio/Tests/TwilioTransportTest.php b/src/Symfony/Component/Notifier/Bridge/Twilio/Tests/TwilioTransportTest.php
index 1142c3e9cc..5520735eca 100644
--- a/src/Symfony/Component/Notifier/Bridge/Twilio/Tests/TwilioTransportTest.php
+++ b/src/Symfony/Component/Notifier/Bridge/Twilio/Tests/TwilioTransportTest.php
@@ -20,14 +20,14 @@ use Symfony\Contracts\HttpClient\HttpClientInterface;
 
 final class TwilioTransportTest extends TestCase
 {
-    public function testToStringContainsProperties(): void
+    public function testToStringContainsProperties()
     {
         $transport = $this->createTransport();
 
         $this->assertSame('twilio://host.test?from=sender', (string) $transport);
     }
 
-    public function testSupportsMessageInterface(): void
+    public function testSupportsMessageInterface()
     {
         $transport = $this->createTransport();
 
@@ -35,7 +35,7 @@ final class TwilioTransportTest extends TestCase
         $this->assertFalse($transport->supports($this->createMock(MessageInterface::class)));
     }
 
-    public function testSendNonSmsMessageThrowsException(): void
+    public function testSendNonSmsMessageThrowsException()
     {
         $transport = $this->createTransport();