diff --git a/.github/workflows/coverage.yml b/.github/workflows/coverage.yml
index ea10b9c..1e5595e 100644
--- a/.github/workflows/coverage.yml
+++ b/.github/workflows/coverage.yml
@@ -1,7 +1,7 @@
 ---
 name: Coverage
 
-on: [push]
+on: [push, pull_request]
 
 jobs:
   build:
@@ -15,5 +15,8 @@ jobs:
         bundler-cache: true
     - name: Build and test with RSpec
       run: bundle exec rspec
-      env:
-        COVERALLS_REPO_TOKEN: ${{ secrets.COVERALLS_REPO_TOKEN }}
+    - name: Report coverage to Coveralls
+      uses: coverallsapp/github-action@v2
+      with:
+        github-token: ${{ secrets.GITHUB_TOKEN }}
+        path-to-lcov: coverage/lcov.info
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8111ee8..eb5202b 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,6 @@
 ### 1.2.2 (Next)
 
+* [#65](https://github.com/dblock/ruby-enum/pull/65): Fixed coverage reporting to Coveralls not running on pull requests by switching from `coveralls_reborn`/`COVERALLS_REPO_TOKEN` to `coverallsapp/github-action`/`GITHUB_TOKEN` - [@dblock](https://github.com/dblock).
 * Your contribution here.
 
 ### 1.2.1 (2026/08/15)
diff --git a/Gemfile b/Gemfile
index 3ce44a3..82808f4 100644
--- a/Gemfile
+++ b/Gemfile
@@ -18,5 +18,6 @@ group :development, :test do
 end
 
 group :test do
-  gem 'coveralls_reborn', require: false
+  gem 'simplecov'
+  gem 'simplecov-lcov', require: false
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index bdc51a2..8c82783 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -4,8 +4,16 @@
 
 require 'rubygems'
 
-require 'coveralls'
-Coveralls.wear!
+require 'simplecov'
+require 'simplecov-lcov'
+
+SimpleCov::Formatter::LcovFormatter.config.report_with_single_file = true
+SimpleCov::Formatter::LcovFormatter.config.single_report_path = 'coverage/lcov.info'
+SimpleCov.formatter = SimpleCov::Formatter::MultiFormatter.new([
+                                                                 SimpleCov::Formatter::HTMLFormatter,
+                                                                 SimpleCov::Formatter::LcovFormatter
+                                                               ])
+SimpleCov.start
 
 require 'rspec'
 require 'ruby-enum'