diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index ab1d23db8..093571fa6 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,16 +6,17 @@ concurrency:
 
 jobs:
   build:
+    name: "Tests: Ruby ${{ matrix.ruby }} - ${{ matrix.os }}"
     runs-on: ${{ matrix.os }}-latest
     timeout-minutes: 10
 
     strategy:
       fail-fast: false
       matrix:
-        ruby: [2.3, 2.4, 2.5, 2.6, 2.7, '3.0', 3.1, 3.2, 3.3, jruby, truffleruby]
+        ruby: [2.3, 2.4, 2.5, 2.6, 2.7, '3.0', 3.1, 3.2, 3.3, 3.4, jruby, truffleruby]
         os: [ubuntu]
         include:
-          - ruby: 3.3
+          - ruby: ruby
             os: windows
 
     env:
@@ -23,7 +24,6 @@ jobs:
       RUBYOPT: '-w'
       JRUBY_OPTS: '--dev'
 
-    name: "Tests: Ruby ${{ matrix.ruby }} - ${{ matrix.os }}"
     steps:
     - name: Clone Repo
       uses: actions/checkout@v4
@@ -35,6 +35,21 @@ jobs:
     - name: Run tests
       run: bundle exec rake ci
 
+  no-extensions:
+    name: "Test without C extension"
+    runs-on: ubuntu-latest
+    timeout-minutes: 10
+    env:
+      RUBYOPT: '-w'
+    steps:
+    - uses: actions/checkout@v4
+    - uses: ruby/setup-ruby@v1
+      with:
+        ruby-version: ruby
+        bundler-cache: true
+    - name: Run tests
+      run: bundle exec rake spec:ci
+
   isolated:
     name: "Test isolated"
     runs-on: ubuntu-latest