diff --git a/Library/Homebrew/cask/lib/hbc/cli/style.rb b/Library/Homebrew/cask/lib/hbc/cli/style.rb
index 068f89d74c..0dd4bc4742 100644
--- a/Library/Homebrew/cask/lib/hbc/cli/style.rb
+++ b/Library/Homebrew/cask/lib/hbc/cli/style.rb
@@ -56,6 +56,7 @@ module Hbc
       def default_args
         [
           "--require", "rubocop-cask",
+          "--config", "/dev/null", # always use `rubocop-cask` default config
           "--format", "simple",
           "--force-exclusion"
         ]