diff --git a/lib/tasks/docker.rake b/lib/tasks/docker.rake
index 430d9d768cd..66f0660ca01 100644
--- a/lib/tasks/docker.rake
+++ b/lib/tasks/docker.rake
@@ -34,6 +34,8 @@ task 'docker:test' do
       @good &&= run_or_fail("bundle exec rspec")
     end
     unless ENV["RUBY_ONLY"]
+      @good &&= run_or_fail("eslint --ext \".es6\" app/assets/javascripts")
+      @good &&= run_or_fail("eslint --ext \".es6\" test/javascripts")
       @good &&= run_or_fail("bundle exec rake qunit:test")
     end