diff --git a/Library/Homebrew/rubocops/components_order.rb b/Library/Homebrew/rubocops/components_order.rb
index 7b6fc8c8ba..1a8f0ea13b 100644
--- a/Library/Homebrew/rubocops/components_order.rb
+++ b/Library/Homebrew/rubocops/components_order.rb
@@ -125,7 +125,8 @@ module RuboCop
         end
 
         def check_on_system_block_content(component_precedence_list, on_system_block)
-          if on_system_block.body.block_type? && !on_system_methods.include?(on_system_block.body.method_name)
+          if on_system_block.body.block_type? && !on_system_methods.include?(on_system_block.body.method_name) &&
+             on_system_block.body.method_name != :fails_with
             offending_node(on_system_block)
             problem "Nest `#{on_system_block.method_name}` blocks inside `#{on_system_block.body.method_name}` " \
                     "blocks when there is only one inner block." do |corrector|