diff --git a/Guardfile b/Guardfile
index 955ca3b4e..759359964 100644
--- a/Guardfile
+++ b/Guardfile
@@ -18,6 +18,7 @@ group :red_green_refactor, halt_on_fail: true do
     watch(%r{^app/(.+)\.rb$})                           { |m| "spec/#{m[1]}_spec.rb" }
     watch(%r{^app/(.*)(\.erb|\.haml|\.slim)$})          { |m| "spec/#{m[1]}#{m[2]}_spec.rb" }
     watch(%r{^app/controllers/(.+)_(controller)\.rb$})  { |m| ["spec/routing/#{m[1]}_routing_spec.rb", "spec/#{m[2]}s/#{m[1]}_#{m[2]}_spec.rb", "spec/acceptance/#{m[1]}_spec.rb"] }
+    watch(%r{^app/models/epp/(.+)\.rb$})  { |m| "spec/epp/#{m[1]}_spec.rb" }
     watch(%r{^spec/support/(.+)\.rb$})                  { "spec" }
     watch('config/routes.rb')                           { "spec/routing" }
     watch('app/controllers/application_controller.rb')  { "spec/controllers" }