.github/workflows/test.yml in hachi-1.0.0 vs .github/workflows/test.yml in hachi-2.0.0

@@ -2,25 +2,22 @@
 
 on: [pull_request]
 
 jobs:
   build:
-
     runs-on: ubuntu-latest
 
     strategy:
       fail-fast: false
       matrix:
-        ruby: [2.7, '3.0']
+        ruby: [2.7, "3.0", 3.1]
 
     steps:
-    - uses: actions/checkout@v2
-    - name: Set up Ruby
-      uses: ruby/setup-ruby@v1
-      with:
-        ruby-version: ${{ matrix.ruby }}
-        bundler-cache: true
-    - name: Build and test with Rake
-      run: |
-        gem install bundler
-        bundle install
-        bundle exec rake
\ No newline at end of file
+      - uses: actions/checkout@v3
+      - name: Set up Ruby
+        uses: ruby/setup-ruby@v1
+        with:
+          ruby-version: ${{ matrix.ruby }}
+          bundler-cache: true
+      - name: Test with Rake
+        run: |
+          bundle exec rake