diff --git a/docker/backend_e2e/sat.conf b/docker/backend_e2e/sat.conf
index 3d37124e..127583a5 100644
--- a/docker/backend_e2e/sat.conf
+++ b/docker/backend_e2e/sat.conf
@@ -1,3 +1,6 @@
+[DEFAULT]
+xmpp_domain = server1.test
+
 [component file_sharing]
 tls_certificate = /usr/share/sat/certificates/server1.test.pem
 tls_private_key = /usr/share/sat/certificates/server1.test-key.pem