diff --git a/symfony/fake-chat-notifier/5.3/manifest.json b/symfony/fake-chat-notifier/5.3/manifest.json
new file mode 100644
index 00000000..f569e60c
--- /dev/null
+++ b/symfony/fake-chat-notifier/5.3/manifest.json
@@ -0,0 +1,5 @@
+{
+    "env": {
+        "#1": "FAKE_CHAT_DSN=fakechat+email://MAILER_SERVICE_ID?to=TO&from=FROM"
+    }
+}