Rails.application.config.assets.configure do |env| env.logger = Logger.new('/dev/null') end Rails::Rack::Logger.class_eval do def call_with_quiet_assets(env) override = false if (env['PATH_INFO'].index("/assets/") == 0) || (env['PATH_INFO'].index("mini-profiler-resources") == 0) if ::Logster::Logger === Rails.logger override = true Rails.logger.override_level = Logger::ERROR end end call_without_quiet_assets(env).tap do if override Rails.logger.override_level = nil end end end alias_method_chain :call, :quiet_assets end