diff --git a/.github/workflows/pr-test.yml b/.github/workflows/pr-test.yml
index 1d71b283e..40c2a353e 100644
--- a/.github/workflows/pr-test.yml
+++ b/.github/workflows/pr-test.yml
@@ -656,7 +656,7 @@ jobs:
       fail-fast: false
       max-parallel: ${{ fromJson(needs.check-changes.outputs.max_parallel) }}
       matrix:
-        partition: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9]
+        partition: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -684,7 +684,7 @@ jobs:
           if [[ "${{ needs.check-changes.outputs.continue_on_error }}" == "true" ]]; then
             CONTINUE_ON_ERROR_FLAG="--continue-on-error"
           fi
-          python3 run_suite.py --hw cuda --suite stage-b-test-large-1-gpu --auto-partition-id ${{ matrix.partition }} --auto-partition-size 10 $CONTINUE_ON_ERROR_FLAG
+          python3 run_suite.py --hw cuda --suite stage-b-test-large-1-gpu --auto-partition-id ${{ matrix.partition }} --auto-partition-size 12 $CONTINUE_ON_ERROR_FLAG
 
   stage-b-test-large-2-gpu:
     needs: [check-changes, call-gate, stage-a-test-1, sgl-kernel-build-wheels]