diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 5462900..a97f583 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -1,56 +1,25 @@
-name: Build (Linter + Specs)
+name: Test (Linter + Typecheck + Specs)
 on: [push, pull_request]
 jobs:
-  ruby33:
+  test:
     runs-on: ubuntu-latest
     strategy:
       fail-fast: false
+      matrix:
+        - ruby_version: '3.1'
+          env: gemfiles/ruby31.gemfile
+        - ruby_version: '3.2'
+          env: gemfiles/ruby32.gemfile
+        - ruby_version: '3.3'
+          env: gemfiles/ruby33.gemfile
     env:
-      BUNDLE_GEMFILE: gemfiles/ruby33.gemfile
+      BUNDLE_GEMFILE: ${{ matrix.env }}
     steps:
       - uses: actions/checkout@v4
       - uses: supercharge/redis-github-action@1.7.0
       - uses: ruby/setup-ruby@v1
         with:
-          ruby-version: '3.3'
-          bundler-cache: true
-      - name: (Linter) Rubocop
-        run: bundle exec rake rubocop
-      - name: (TypeCheck) Steep
-        run: bundle exec steep check --jobs 10
-      - name: (Test) RSpec
-        run: bundle exec rake rspec
-  ruby32:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-    env:
-      BUNDLE_GEMFILE: gemfiles/ruby32.gemfile
-    steps:
-      - uses: actions/checkout@v4
-      - uses: supercharge/redis-github-action@1.7.0
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: '3.2'
-          bundler-cache: true
-      - name: (Linter) Rubocop
-        run: bundle exec rake rubocop
-      - name: (TypeCheck) Steep
-        run: bundle exec steep check --jobs 10
-      - name: (Test) RSpec
-        run: bundle exec rake rspec
-  ruby31:
-    runs-on: ubuntu-latest
-    strategy:
-      fail-fast: false
-    env:
-      BUNDLE_GEMFILE: gemfiles/ruby31.gemfile
-    steps:
-      - uses: actions/checkout@v4
-      - uses: supercharge/redis-github-action@1.7.0
-      - uses: ruby/setup-ruby@v1
-        with:
-          ruby-version: '3.1'
+          ruby-version: ${{ matrix.ruby_version }}
           bundler-cache: true
       - name: (Linter) Rubocop
         run: bundle exec rake rubocop