diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index e0f758d..b561d3e 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -31,7 +31,5 @@ jobs:
         with:
           ruby-version: ${{ matrix.ruby-version }}
           bundler-cache: true
-      - name: Install dependencies
-        run: bundle install
       - name: Run tests for Ruby ${{ matrix.ruby-version }} on ${{ matrix.os }}
         run: bundle exec rake
diff --git a/Gemfile b/Gemfile
index f238231..62e810e 100644
--- a/Gemfile
+++ b/Gemfile
@@ -1,8 +1,9 @@
 source "https://rubygems.org"
 
 gemspec
-gem "rake"
-gem "minitest"
-gem "standard"
 gem "m"
+gem "minitest"
 gem "mocktail"
+gem "rake"
+gem "simplecov"
+gem "standard"
diff --git a/Gemfile.lock b/Gemfile.lock
index 350e4f8..e4fccba 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -9,55 +9,60 @@ GEM
   remote: https://rubygems.org/
   specs:
     ast (2.4.2)
-    json (2.7.1)
+    docile (1.4.1)
+    json (2.8.1)
     language_server-protocol (3.17.0.3)
     lint_roller (1.1.0)
     m (1.6.1)
       method_source (>= 0.6.7)
       rake (>= 0.9.2.2)
     method_source (1.0.0)
-    minitest (5.19.0)
+    minitest (5.25.1)
     mocktail (2.0.0)
       sorbet-eraser (~> 0.3.1)
       sorbet-runtime (~> 0.5.9204)
-    parallel (1.24.0)
-    parser (3.3.1.0)
+    parallel (1.26.3)
+    parser (3.3.6.0)
       ast (~> 2.4.1)
       racc
-    racc (1.7.3)
+    racc (1.8.1)
     rainbow (3.1.1)
     rake (13.0.6)
-    regexp_parser (2.9.0)
-    rexml (3.2.6)
-    rubocop (1.59.0)
+    regexp_parser (2.9.2)
+    rubocop (1.66.1)
       json (~> 2.3)
       language_server-protocol (>= 3.17.0)
       parallel (~> 1.10)
-      parser (>= 3.2.2.4)
+      parser (>= 3.3.0.2)
       rainbow (>= 2.2.2, < 4.0)
-      regexp_parser (>= 1.8, < 3.0)
-      rexml (>= 3.2.5, < 4.0)
-      rubocop-ast (>= 1.30.0, < 2.0)
+      regexp_parser (>= 2.4, < 3.0)
+      rubocop-ast (>= 1.32.2, < 2.0)
       ruby-progressbar (~> 1.7)
       unicode-display_width (>= 2.4.0, < 3.0)
-    rubocop-ast (1.31.3)
+    rubocop-ast (1.34.1)
       parser (>= 3.3.1.0)
     rubocop-performance (1.22.1)
       rubocop (>= 1.48.1, < 2.0)
       rubocop-ast (>= 1.31.1, < 2.0)
     ruby-progressbar (1.13.0)
+    simplecov (0.22.0)
+      docile (~> 1.1)
+      simplecov-html (~> 0.11)
+      simplecov_json_formatter (~> 0.1)
+    simplecov-html (0.13.1)
+    simplecov_json_formatter (0.1.4)
     sorbet-eraser (0.3.1)
     sorbet-runtime (0.5.11435)
-    standard (1.33.0)
+    standard (1.41.1)
       language_server-protocol (~> 3.17.0.2)
       lint_roller (~> 1.0)
-      rubocop (~> 1.59.0)
+      rubocop (~> 1.66.0)
       standard-custom (~> 1.0.0)
-      standard-performance (~> 1.3)
+      standard-performance (~> 1.5)
     standard-custom (1.0.2)
       lint_roller (~> 1.0)
       rubocop (~> 1.50)
-    unicode-display_width (2.5.0)
+    unicode-display_width (2.6.0)
 
 PLATFORMS
   arm64-darwin-22
@@ -69,8 +74,9 @@ DEPENDENCIES
   minitest
   mocktail
   rake
+  simplecov
   standard
   standard-performance!
 
 BUNDLED WITH
-   2.4.12
+   2.5.23
diff --git a/test/test_helper.rb b/test/test_helper.rb
index cbf60c9..06044b6 100644
--- a/test/test_helper.rb
+++ b/test/test_helper.rb
@@ -1,4 +1,12 @@
 $LOAD_PATH.unshift File.expand_path("../lib", __dir__)
+begin
+  require "simplecov"
+  SimpleCov.start do
+    load_profile "test_frameworks"
+  end
+rescue LoadError
+end
+
 require "standard/performance"
 
 require "minitest/autorun"