diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 577ba1cb2..0784a7d9c 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -54,6 +54,10 @@ jobs:
       run: docker run -d -p 12111-12112:12111-12112 stripe/stripe-mock && sleep 5
     - name: test
       run: bundle install && bundle exec rake test
+      env:
+        GITHUB_TOKEN: ${{ secrets.github_token }}
+        COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
+        COVERALLS_SERVICE_NAME: github-action
 
   publish:
     name: Publish
diff --git a/Gemfile b/Gemfile
index ab22a8a0e..450146e6f 100644
--- a/Gemfile
+++ b/Gemfile
@@ -5,6 +5,7 @@ source "https://rubygems.org"
 gemspec
 
 group :development do
+  gem "coveralls_reborn", "~> 0.25.0" if RUBY_VERSION >= "3.1"
   gem "mocha", "~> 0.13.2"
   gem "rack", ">= 2.0.6"
   gem "rake"
diff --git a/README.md b/README.md
index bc2401460..e32af3dd7 100644
--- a/README.md
+++ b/README.md
@@ -2,6 +2,7 @@
 
 [![Gem Version](https://badge.fury.io/rb/stripe.svg)](https://badge.fury.io/rb/stripe)
 [![Build Status](https://github.com/stripe/stripe-ruby/actions/workflows/ci.yml/badge.svg?branch=master)](https://github.com/stripe/stripe-ruby/actions?query=branch%3Amaster)
+[![Coverage Status](https://coveralls.io/repos/github/stripe/stripe-ruby/badge.svg?branch=master)](https://coveralls.io/github/stripe/stripe-ruby?branch=master)
 
 The Stripe Ruby library provides convenient access to the Stripe API from
 applications written in the Ruby language. It includes a pre-defined set of
diff --git a/test/test_helper.rb b/test/test_helper.rb
index 7af834b0e..4876b9fba 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,5 +1,13 @@
 # frozen_string_literal: true
 
+# Report test coverage to coveralls for only one Ruby version to avoid
+# repeated builds. This also accounts for coveralls_reborn requiring
+# RUBY_VERSION >= 2.5.
+if RUBY_VERSION.start_with?("3.1.")
+  require "coveralls"
+  Coveralls.wear!
+end
+
 require "stripe"
 require "test/unit"
 require "mocha/setup"