diff --git a/libervia/backend/plugins/plugin_xep_0115.py b/libervia/backend/plugins/plugin_xep_0115.py
index a17add42..930bf5d6 100644
--- a/libervia/backend/plugins/plugin_xep_0115.py
+++ b/libervia/backend/plugins/plugin_xep_0115.py
@@ -495,9 +495,11 @@ class XEP_0115_handler(XMPPHandler):
                     # we have `client.disco` set (see
                     # https://www.goffi.org/tickets/view/484)
                     d = self.client.conn_deferred
-                    d.addCallback(lambda __: self.client.disco.requestInfo(
-                        server_jid, nodeIdentifier=caps_node
-                    ))
+                    d.addCallback(
+                        lambda __: self.client.disco.requestInfo(
+                            server_jid, nodeIdentifier=caps_node
+                        )
+                    )
                     d.addCallback(self._caps_node_cb, ver)
                     d.addErrback(self._caps_node_eb, server_jid, ver)