diff --git a/.github/workflows/coverage.yaml b/.github/workflows/coverage.yaml
index 521eb892..8bfcab47 100644
--- a/.github/workflows/coverage.yaml
+++ b/.github/workflows/coverage.yaml
@@ -11,20 +11,25 @@ env:
 
 jobs:
   test:
-    name: ${{matrix.ruby}} on ${{matrix.os}}
+    name: ${{matrix.ruby}} on ${{matrix.os}} with ${{matrix.selector}}
     runs-on: ${{matrix.os}}-latest
     
     strategy:
       matrix:
-        os:
-          - ubuntu
-        
-        ruby:
-          - "3.1"
-          - "3.2"
-          - "3.3"
-          - "ruby-head"
-    
+        include:
+          - os: ubuntu
+            ruby: "3.1"
+            selector: EPoll
+          - os: ubuntu
+            ruby: "3.2"
+            selector: EPoll
+            - os: ubuntu
+            ruby: "3.3"
+            selector: EPoll
+          - os: ubuntu
+            ruby: "3.3"
+            selector: URing
+       
     steps:
     - uses: actions/checkout@v3
     - uses: ruby/setup-ruby@v1
@@ -34,6 +39,8 @@ jobs:
     
     - name: Run tests
       timeout-minutes: 5
+      env:
+        IO_EVENT_SELECTOR: ${{matrix.selector}}
       run: bundle exec bake test
 
     - uses: actions/upload-artifact@v2
diff --git a/.github/workflows/test-io_uring.yaml b/.github/workflows/test-io_uring.yaml
index 5afb5f0d..7595eda1 100644
--- a/.github/workflows/test-io_uring.yaml
+++ b/.github/workflows/test-io_uring.yaml
@@ -42,6 +42,6 @@ jobs:
       timeout-minutes: 10
       run: bundle exec bake test
     
-    - name: Run external tests
-      timeout-minutes: 10
-      run: bundle exec bake test:external
+    # - name: Run external tests
+    #   timeout-minutes: 10
+    #   run: bundle exec bake test:external