diff --git a/.github/workflows/infection.yml b/.github/workflows/infection.yml
index 526db27..595bfa5 100644
--- a/.github/workflows/infection.yml
+++ b/.github/workflows/infection.yml
@@ -10,6 +10,7 @@ on:
 jobs:
   mutation_testing:
     name: "5️⃣ Mutation Testing"
+    runs-on: "ubuntu-latest"
     steps:
       - name: "Set up PHP"
         uses: "shivammathur/setup-php@v2"