diff --git a/Library/Homebrew/cmd/list.rb b/Library/Homebrew/cmd/list.rb
index 080dc25585e8e..052017bc437ee 100644
--- a/Library/Homebrew/cmd/list.rb
+++ b/Library/Homebrew/cmd/list.rb
@@ -221,7 +221,7 @@ def list_casks
             else
               path.basename.to_s
             end
-          end.uniq
+          end.uniq.sort
           cask_paths.map { |name| Cask::CaskLoader.load(name) }
         else
           filtered_args = args.named.dup.delete_if do |n|