diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index a6dd16664..52d1c81c9 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -9,9 +9,15 @@ jobs:
 
     env:
       DEBIAN_FRONTEND: noninteractive
+      PARALLEL_WORKERS: 8 # number of parallel tests to run
+
+      # Code Climate configuration. https://docs.codeclimate.com/docs/finding-your-test-coverage-token
+      CC_TEST_REPORTER_ID: ${{ secrets.CC_TEST_REPORTER_ID }}
+      GIT_COMMIT_SHA: ${{ github.sha }}
+      GIT_BRANCH: ${{ github.ref }}
+
       DATABASE_URL: postgresql://danbooru:danbooru@postgres/danbooru
       ARCHIVE_DATABASE_URL: postgresql://danbooru:danbooru@postgres/danbooru
-      PARALLEL_WORKERS: 8 # number of parallel tests to run
       DANBOORU_SECRET_KEY_BASE: 1234
       DANBOORU_AWS_SQS_ENABLED: false
       DANBOORU_TWITTER_API_KEY: ${{ secrets.DANBOORU_TWITTER_API_KEY }}
@@ -48,12 +54,23 @@ jobs:
 #    - name: Run tests
 #      run: docker-compose --env-file ~/.env -f config/docker/docker-compose.test.yaml -p danbooru up
     - name: Install OS dependencies
-      run: apt-get update && apt-get -y install build-essential ruby ruby-dev ruby-bundler git nodejs yarnpkg webpack ffmpeg mkvtoolnix libvips-dev libxml2-dev postgresql-server-dev-all && ln -sf /usr/bin/yarnpkg /usr/bin/yarn
+      run: |
+        apt-get update
+        apt-get -y install --no-install-recommends build-essential ruby ruby-dev ruby-bundler git nodejs yarnpkg webpack ffmpeg mkvtoolnix libvips-dev libxml2-dev postgresql-server-dev-all wget
+        ln -sf /usr/bin/yarnpkg /usr/bin/yarn
     - name: Install Ruby dependencies
       run: BUNDLE_DEPLOYMENT=true bundle install --jobs 4
     - name: Install Javascript dependencies
       run: yarn install
     - name: Prepare database
       run: config/docker/prepare-tests.sh
+    # https://docs.codeclimate.com/docs/configuring-test-coverage
+    - name: Prepare test coverage for Code Climate
+      run: |
+        wget https://codeclimate.com/downloads/test-reporter/test-reporter-latest-linux-amd64
+        chmod +x test-reporter-latest-linux-amd64
+        ./test-reporter-latest-linux-amd64 before-build
     - name: Run tests
       run: bin/rails test
+    - name: Upload test coverage to Code Climate
+      run: ./test-reporter-latest-linux-amd64 after-build
diff --git a/.gitignore b/.gitignore
index 2555e75e9..8f4292733 100644
--- a/.gitignore
+++ b/.gitignore
@@ -7,6 +7,7 @@ config/database.yml
 config/danbooru_local_config.rb
 config/deploy/*.rb
 config/newrelic.yml
+coverage/
 node_modules/
 log/
 tmp/
diff --git a/.simplecov b/.simplecov
index 2d7f30f4f..628307e3c 100644
--- a/.simplecov
+++ b/.simplecov
@@ -1,8 +1,8 @@
 SimpleCov.start "rails" do
   add_group "Libraries", ["app/logical", "lib"]
   add_group "Presenters", "app/presenters"
-  enable_coverage :branch
-  minimum_coverage line: 85, branch: 75
-  minimum_coverage_by_file 50
-  coverage_dir "tmp/coverage"
+  #enable_coverage :branch
+  #minimum_coverage line: 85, branch: 75
+  #minimum_coverage_by_file 50
+  #coverage_dir "tmp/coverage"
 end
diff --git a/Gemfile b/Gemfile
index 355badd8f..ad30bc238 100644
--- a/Gemfile
+++ b/Gemfile
@@ -85,7 +85,7 @@ group :test do
   gem "factory_bot"
   gem "mocha", require: "mocha/minitest"
   gem "ffaker"
-  gem "simplecov", require: false
+  gem "simplecov", "~> 0.17.0", require: false
   gem "webmock", require: "webmock/minitest"
   gem "minitest-ci"
   gem "minitest-reporters", require: "minitest/reporters"
diff --git a/Gemfile.lock b/Gemfile.lock
index 78ea389ba..9d09ede27 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -363,10 +363,11 @@ GEM
     simple_form (5.0.2)
       actionpack (>= 5.0)
       activemodel (>= 5.0)
-    simplecov (0.18.5)
+    simplecov (0.17.1)
       docile (~> 1.1)
-      simplecov-html (~> 0.11)
-    simplecov-html (0.12.2)
+      json (>= 1.8, < 3)
+      simplecov-html (~> 0.10.0)
+    simplecov-html (0.10.2)
     sinatra (2.0.8.1)
       mustermann (~> 1.0)
       rack (~> 2.0)
@@ -490,7 +491,7 @@ DEPENDENCIES
   shoulda-context
   shoulda-matchers
   simple_form
-  simplecov
+  simplecov (~> 0.17.0)
   sinatra
   stackprof
   streamio-ffmpeg