diff --git a/railties/test/isolation/abstract_unit.rb b/railties/test/isolation/abstract_unit.rb
index 3f1638a51660c532d3af0509a93c0a70808b22b0..b0662e0159d2d05b46f802ace83bd2a132431ef1 100644
--- a/railties/test/isolation/abstract_unit.rb
+++ b/railties/test/isolation/abstract_unit.rb
@@ -488,7 +488,14 @@ class ActiveSupport::TestCase
     f.puts "require 'rails/all'"
   end
 
+  unless File.exist?("#{RAILS_FRAMEWORK_ROOT}/actionview/lib/assets/compiled/rails-ujs.js")
+    Dir.chdir("#{RAILS_FRAMEWORK_ROOT}/actionview") { `yarn build` }
+  end
+
   assets_path = "#{RAILS_FRAMEWORK_ROOT}/railties/test/isolation/assets"
+  unless Dir.exist?("#{assets_path}/node_modules")
+    Dir.chdir(assets_path) { `yarn install` }
+  end
   FileUtils.cp("#{assets_path}/package.json", "#{app_template_path}/package.json")
   FileUtils.cp("#{assets_path}/config/webpacker.yml", "#{app_template_path}/config/webpacker.yml")
   FileUtils.cp_r("#{assets_path}/config/webpack", "#{app_template_path}/config/webpack")