diff --git a/src/Symfony/Component/Notifier/Bridge/Bluesky/BlueskyTransport.php b/src/Symfony/Component/Notifier/Bridge/Bluesky/BlueskyTransport.php
index dc307a9aea6be..32a89c212161a 100644
--- a/src/Symfony/Component/Notifier/Bridge/Bluesky/BlueskyTransport.php
+++ b/src/Symfony/Component/Notifier/Bridge/Bluesky/BlueskyTransport.php
@@ -30,6 +30,8 @@
  */
 final class BlueskyTransport extends AbstractTransport
 {
+    protected const HOST = 'bsky.social';
+
     private array $authSession = [];
 
     public function __construct(
diff --git a/src/Symfony/Component/Notifier/Bridge/Bluesky/Tests/BlueskyTransportFactoryTest.php b/src/Symfony/Component/Notifier/Bridge/Bluesky/Tests/BlueskyTransportFactoryTest.php
index 5f5b9a37ee47f..08ad6ccc84c0e 100644
--- a/src/Symfony/Component/Notifier/Bridge/Bluesky/Tests/BlueskyTransportFactoryTest.php
+++ b/src/Symfony/Component/Notifier/Bridge/Bluesky/Tests/BlueskyTransportFactoryTest.php
@@ -24,15 +24,20 @@ public function createFactory(): BlueskyTransportFactory
     public static function createProvider(): iterable
     {
         yield [
-            'bluesky://bsky.social',
-            'bluesky://user:pass@bsky.social',
+            'bluesky://default',
+            'bluesky://user:pass@default',
+        ];
+
+        yield [
+            'bluesky://custom.bsky.social',
+            'bluesky://user:pass@custom.bsky.social',
         ];
     }
 
     public static function supportsProvider(): iterable
     {
-        yield [true, 'bluesky://foo:bar@bsky.social'];
-        yield [false, 'somethingElse://foo:bar@bsky.social'];
+        yield [true, 'bluesky://foo:bar@default'];
+        yield [false, 'somethingElse://foo:bar@default'];
     }
 
     public static function incompleteDsnProvider(): iterable