diff --git a/.github/workflows/integration_test_8gpu_h100.yaml b/.github/workflows/integration_test_8gpu_h100.yaml
index 2a7b8b831f..813669748d 100644
--- a/.github/workflows/integration_test_8gpu_h100.yaml
+++ b/.github/workflows/integration_test_8gpu_h100.yaml
@@ -6,6 +6,7 @@ on:
     paths-ignore:
       - 'torchtitan/experiments/**'
   pull_request:
+    branches: [ main ]
     paths-ignore:
       - 'torchtitan/experiments/**'
   schedule: