diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 87d4574..9017e96 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -35,3 +35,18 @@ jobs:
           ruby-version: "3.2"
           bundler-cache: true
       - run: bundle exec rubocop
+
+  qlty:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@f43a0e5ff2bd294095638e18286ca9a3d1956744 # v3.6.0
+      - uses: ruby/setup-ruby@13e7a03dc3ac6c3798f4570bfead2aed4d96abfb # v1.244.0
+        with:
+          ruby-version: '3.2'
+          bundler-cache: true
+      - name: Test
+        run: bundle exec rspec
+      - uses: qltysh/qlty-action/coverage@a19242102d17e497f437d7466aa01b528537e899 # v2.2.0
+        with:
+          token: ${{ secrets.QLTY_COVERAGE_TOKEN }}
+          files: ./coverage/coverage.json
diff --git a/README.md b/README.md
index 84ed99d..9220f0e 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,8 @@
 # Ruboty::Github
-[![Gem Version](https://badge.fury.io/rb/ruboty-qiita-github.svg)](https://badge.fury.io/rb/ruboty-qiita-github) [![Test](https://github.com/increments/ruboty-qiita-github/actions/workflows/test.yml/badge.svg?branch=master)](https://github.com/increments/ruboty-qiita-github/actions/workflows/test.yml)
+[![Gem Version](https://badge.fury.io/rb/ruboty-qiita-github.svg)](https://badge.fury.io/rb/ruboty-qiita-github)
+[![Test](https://github.com/increments/ruboty-qiita-github/actions/workflows/test.yml/badge.svg?branch=master)](https://github.com/increments/ruboty-qiita-github/actions/workflows/test.yml)
+[![Maintainability](https://qlty.sh/gh/increments/projects/ruboty-qiita-github/maintainability.svg)](https://qlty.sh/gh/increments/projects/ruboty-qiita-github)
+[![Code Coverage](https://qlty.sh/gh/increments/projects/ruboty-qiita-github/coverage.svg)](https://qlty.sh/gh/increments/projects/ruboty-qiita-github)
 
 Manage GitHub via Ruboty.
 This gem adds `deploy pull request` command to original ruboty-github plugin.
diff --git a/ruboty-github.gemspec b/ruboty-github.gemspec
index 0194259..9715342 100644
--- a/ruboty-github.gemspec
+++ b/ruboty-github.gemspec
@@ -28,6 +28,7 @@ Gem::Specification.new do |spec|
   spec.add_development_dependency 'rubocop-rake'
   spec.add_development_dependency 'rubocop-rspec'
   spec.add_development_dependency 'simplecov'
+  spec.add_development_dependency 'simplecov_json_formatter'
   spec.add_development_dependency 'webmock'
   spec.metadata['rubygems_mfa_required'] = 'true'
 end
diff --git a/spec/spec_helper.rb b/spec/spec_helper.rb
index c96367a..b718404 100644
--- a/spec/spec_helper.rb
+++ b/spec/spec_helper.rb
@@ -1,7 +1,16 @@
 # frozen_string_literal: true
 
 require 'simplecov'
-SimpleCov.start
+require 'simplecov_json_formatter'
+
+SimpleCov.start do
+  SimpleCov.formatters = [
+    SimpleCov::Formatter::JSONFormatter,
+    SimpleCov::Formatter::HTMLFormatter
+  ]
+
+  add_filter '/spec/'
+end
 
 require 'ruboty/github'
 require 'webmock/rspec'