diff --git a/.cirun.yml b/.cirun.yml
index ccae08b6..21bbd7ee 100644
--- a/.cirun.yml
+++ b/.cirun.yml
@@ -14,3 +14,16 @@ runners:
     # So that this runner is created for running the workflow
     labels:
       - "cirun-aws-runner-graviton"
+  - name: "aws-runner-cascade-lake"
+    # Cloud Provider: AWS
+    cloud: "aws"
+    region: "us-east-1"
+    # Cheapest VM on AWS
+    instance_type: "m5.large"
+    # Ubuntu-24.04, ami image
+    machine_image: "ami-04b70fa74e45c3917"
+    preemptible: false
+    # Add this label in the "runs-on" param in .github/workflows/<workflow-name>.yml
+    # So that this runner is created for running the workflow
+    labels:
+      - "cirun-aws-runner-cascade-lake"
diff --git a/.github/workflows/run_cirun_graviton.yml b/.github/workflows/run_cirun_graviton.yml
index 032b1682..51d748a8 100644
--- a/.github/workflows/run_cirun_graviton.yml
+++ b/.github/workflows/run_cirun_graviton.yml
@@ -4,6 +4,9 @@ on:
   push:
     branches:
       - main
+  pull_request:
+    branches:
+      - main
 
 concurrency:
   group: ${{ github.workflow }}-${{ github.head_ref || github.run_id }}