diff --git a/app/models/user.rb b/app/models/user.rb
index 45823b983..c366856c0 100644
--- a/app/models/user.rb
+++ b/app/models/user.rb
@@ -392,7 +392,7 @@ class User < ApplicationRecord
     return unless email.present? && email.include?("@")
     return if saved_changes["unconfirmed_email"] && saved_changes["confirmation_sent_at"]
 
-    Users::SubscribeToMailchimpNewsletterJob.perform_later(id)
+    Users::SubscribeToMailchimpNewsletterWorker.perform_async(id)
   end
 
   def a_sustaining_member?
diff --git a/app/workers/users/subscribe_to_mailchimp_newsletter_worker.rb b/app/workers/users/subscribe_to_mailchimp_newsletter_worker.rb
new file mode 100644
index 000000000..41b8e0d5f
--- /dev/null
+++ b/app/workers/users/subscribe_to_mailchimp_newsletter_worker.rb
@@ -0,0 +1,12 @@
+module Users
+  class SubscribeToMailchimpNewsletterWorker
+    include Sidekiq::Worker
+    sidekiq_options queue: :low_priority, retry: 10
+
+    def perform(user_id)
+      user = User.find_by(id: user_id)
+
+      MailchimpBot.new(user).upsert if user
+    end
+  end
+end
diff --git a/spec/models/user_spec.rb b/spec/models/user_spec.rb
index 00dc4c381..a57dc7524 100644
--- a/spec/models/user_spec.rb
+++ b/spec/models/user_spec.rb
@@ -489,29 +489,31 @@ RSpec.describe User, type: :model do
   end
 
   context "when callbacks are triggered after save" do
-    describe "subscribing to mailchip newsletter" do
-      it "enqueues SubscribeToMailchimpNewsletterJob" do
-        expect do
+    describe "subscribing to mailchimp newsletter" do
+      let(:user) { build(:user) }
+
+      it "enqueues SubscribeToMailchimpNewsletterWorker" do
+        sidekiq_assert_enqueued_with(job: Users::SubscribeToMailchimpNewsletterWorker, args: user.id) do
           user.save
-        end.to have_enqueued_job(Users::SubscribeToMailchimpNewsletterJob).exactly(:once).with(user.id)
+        end
       end
 
       it "does not enqueue without an email" do
-        expect do
+        sidekiq_assert_no_enqueued_jobs(only: Users::SubscribeToMailchimpNewsletterWorker) do
           user.update(email: "")
-        end.not_to have_enqueued_job(Users::SubscribeToMailchimpNewsletterJob).exactly(:once).with(user.id)
+        end
       end
 
       it "does not enqueue with an invalid email" do
-        expect do
+        sidekiq_assert_no_enqueued_jobs(only: Users::SubscribeToMailchimpNewsletterWorker) do
           user.update(email: "foobar")
-        end.not_to have_enqueued_job(Users::SubscribeToMailchimpNewsletterJob).exactly(:once).with(user.id)
+        end
       end
 
       it "does not enqueue with an unconfirmed email" do
-        expect do
+        sidekiq_assert_no_enqueued_jobs(only: Users::SubscribeToMailchimpNewsletterWorker) do
           user.update(unconfirmed_email: "bob@bob.com", confirmation_sent_at: Time.current)
-        end.not_to have_enqueued_job(Users::SubscribeToMailchimpNewsletterJob).exactly(:once).with(user.id)
+        end
       end
     end
   end
diff --git a/spec/system/internal/admin_awards_badges_spec.rb b/spec/system/internal/admin_awards_badges_spec.rb
index 87162a94e..4c6c10603 100644
--- a/spec/system/internal/admin_awards_badges_spec.rb
+++ b/spec/system/internal/admin_awards_badges_spec.rb
@@ -41,7 +41,7 @@ RSpec.describe "Admin awards badges", type: :system do
 
   it "notifies users of new badges" do
     assert_enqueued_jobs(2, only: BadgeAchievements::SendEmailNotificationJob) do
-      sidekiq_assert_enqueued_jobs(2) do
+      sidekiq_assert_enqueued_jobs(2, only: Notifications::NewBadgeAchievementWorker) do
         award_two_badges
       end
     end
diff --git a/spec/workers/users/subscribe_to_mailchimp_newsletter_worker_spec.rb b/spec/workers/users/subscribe_to_mailchimp_newsletter_worker_spec.rb
new file mode 100644
index 000000000..59d609d17
--- /dev/null
+++ b/spec/workers/users/subscribe_to_mailchimp_newsletter_worker_spec.rb
@@ -0,0 +1,20 @@
+require "rails_helper"
+
+RSpec.describe Users::SubscribeToMailchimpNewsletterWorker, type: :worker do
+  include_examples "#enqueues_on_correct_queue", "low_priority", 1
+
+  describe "#perform_now" do
+    let(:worker) { subject }
+    let(:user) { FactoryBot.create(:user) }
+
+    it "subscribes user to mailchimp newsletter" do
+      mailchimp_bot = double
+      allow(MailchimpBot).to receive(:new).and_return(mailchimp_bot)
+      allow(mailchimp_bot).to receive(:upsert)
+
+      worker.perform(user.id)
+
+      expect(mailchimp_bot).to have_received(:upsert)
+    end
+  end
+end