diff --git a/.github/workflows/pipeline.yml b/.github/workflows/pipeline.yml
index db35fde..05fc6b8 100644
--- a/.github/workflows/pipeline.yml
+++ b/.github/workflows/pipeline.yml
@@ -8,7 +8,12 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        ruby: [2.4, 2.5, 2.7, '3.0', 3.1]
+        ruby: [3.1, 3.2, 3.3]
+        gemfile:
+        - Gemfile
+        - gemfiles/unlocked.gemfile
+    env:
+      BUNDLE_GEMFILE: ${{ matrix.gemfile }}
     steps:
     - uses: actions/checkout@v2
     - uses: ruby/setup-ruby@v1
@@ -16,5 +21,8 @@ jobs:
         ruby-version: ${{ matrix.ruby }}
         bundler: 2.2.29
         bundler-cache: true
-    - name: Unit tests
-      run: bundle exec rake test
+    - uses: nick-fields/retry@v3
+      with:
+        max_attempts: 2
+        timeout_minutes: 5
+        command: bundle exec rake test