diff --git a/lib/sidekiq/web.rb b/lib/sidekiq/web.rb
index 0996f9f7..3756706f 100644
--- a/lib/sidekiq/web.rb
+++ b/lib/sidekiq/web.rb
@@ -143,13 +143,14 @@ module Sidekiq
       klass = self.class
       m = middlewares
 
+      rules = []
+      rules = [[:all, {"Cache-Control" => "public, max-age=86400"}]] unless ENV['SIDEKIQ_WEB_TESTING']
+
       ::Rack::Builder.new do
         use Rack::Static, urls: ["/stylesheets", "/images", "/javascripts"],
                           root: ASSETS,
                           cascade: true,
-                          header_rules: [
-                            [:all, {"Cache-Control" => "public, max-age=86400"}]
-                          ]
+                          header_rules: rules
         m.each { |middleware, block| use(*middleware, &block) }
         use Sidekiq::Web::CsrfProtection unless $TESTING
         run WebApplication.new(klass)
diff --git a/myapp/config/routes.rb b/myapp/config/routes.rb
index 55ec154c..c32e3f26 100644
--- a/myapp/config/routes.rb
+++ b/myapp/config/routes.rb
@@ -1,3 +1,6 @@
+# turns off browser asset caching so we can test CSS changes quickly
+ENV['SIDEKIQ_WEB_TESTING'] = '1'
+
 require 'sidekiq/web'
 Sidekiq::Web.app_url = '/'