diff --git a/.github/workflows/pr-test.yml b/.github/workflows/pr-test.yml
index dd161c810..e36383c7f 100644
--- a/.github/workflows/pr-test.yml
+++ b/.github/workflows/pr-test.yml
@@ -265,7 +265,7 @@ jobs:
     strategy:
       fail-fast: false
       matrix:
-        part: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10]
+        part: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12]
     steps:
       - name: Checkout code
         uses: actions/checkout@v4
@@ -286,7 +286,7 @@ jobs:
         timeout-minutes: 30
         run: |
           cd test/srt
-          python3 run_suite.py --suite per-commit-1-gpu --auto-partition-id ${{ matrix.part }} --auto-partition-size 11
+          python3 run_suite.py --suite per-commit-1-gpu --auto-partition-id ${{ matrix.part }} --auto-partition-size 13
 
   unit-test-backend-2-gpu:
     needs: [check-changes, sgl-kernel-build-wheels]