diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index a7b4fbf0..4a340ed2 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -77,6 +77,11 @@ jobs:
         key: vendor-${{ hashFiles('**/go.sum') }}
         restore-keys: |
           vendor-
+    - uses: ruby/setup-ruby@v1
+      with:
+        # Use <3.0 since go-mruby's Rakefile has some problems with keyword arguments compatibility
+        ruby-version: 2.7
+        bundler-cache: true
     - run: go mod vendor
     - name: Build mruby
       run: bash -c '(cd vendor/github.com/mitchellh/go-mruby && MRUBY_CONFIG=../../../../../../etc/build_config.rb make libmruby.a)'