diff --git a/.gitea/workflows/test.yaml b/.gitea/workflows/test.yaml
index 53d4f59..7eb99ef 100644
--- a/.gitea/workflows/test.yaml
+++ b/.gitea/workflows/test.yaml
@@ -6,7 +6,8 @@ on:
 
 jobs:
     build:
-        runs-on: ubuntu-latest
+        container:
+            image: focs.ji.sjtu.edu.cn:5000/gitea/runner-images:ubuntu-latest
         steps:
             - name: Check out repository code
               uses: https://gitea.com/BoYanZh/checkout@focs