diff --git a/kitty/child.py b/kitty/child.py
index fc8d74979..cfe62b03b 100644
--- a/kitty/child.py
+++ b/kitty/child.py
@@ -423,11 +423,10 @@ def background_processes(self) -> list[ProcessDesc]:
             sid = session_id(gmap.get(foreground_process_group_id, ()))
             if sid < 0:
                 return []
-            ans = []
+            ans: list[ProcessDesc] = []
             for grp_id, pids in gmap.items():
                 if grp_id != foreground_process_group_id and session_id(pids) == sid:
-                    for pid in pids:
-                        ans.append(self.process_desc(pid))
+                    ans.extend(map(self.process_desc, pids))
             return ans
         except Exception:
             return []