diff --git a/packages/ubuntu_lints/lib/analysis_options.yaml b/packages/ubuntu_lints/lib/analysis_options.yaml
index b806c235..2710f84f 100644
--- a/packages/ubuntu_lints/lib/analysis_options.yaml
+++ b/packages/ubuntu_lints/lib/analysis_options.yaml
@@ -11,6 +11,9 @@ analyzer:
     strict-casts: true
     strict-raw-types: true
 
+formatter:
+  trailing_commas: preserve
+
 linter:
   rules:
     - always_declare_return_types