Try running tests on valkey.

.github/workflows/test-valkey.yaml

@@ -0,0 +1,46 @@
+name: Test
+
+on: [push, pull_request]
+
+permissions:
+  contents: read
+
+env:
+  CONSOLE_OUTPUT: XTerm
+
+jobs:
+  test:
+    name: ${{matrix.ruby}} on ${{matrix.os}} (Valkey)
+    runs-on: ${{matrix.os}}-latest
+
+    services:
+      valkey:
+        image: valkey/valkey
+        options: >-
+          --health-cmd "valkey-cli ping"
+          --health-interval 10s
+          --health-timeout 5s
+          --health-retries 5
+        ports:
+          - 6379:6379
+
+    strategy:
+      matrix:
+        os:
+          - ubuntu
+
+        ruby:
+          - "3.1"
+          - "3.2"
+          - "3.3"
+
+    steps:
+    - uses: actions/checkout@v4
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ${{matrix.ruby}}
+        bundler-cache: true
+
+    - name: Run tests
+      timeout-minutes: 10
+      run: bundle exec bake test