diff --git a/.gitea/workflows/push.yaml b/.gitea/workflows/push.yaml
index 5e315a6..c8306d7 100644
--- a/.gitea/workflows/push.yaml
+++ b/.gitea/workflows/push.yaml
@@ -1,4 +1,3 @@
----
 name: push
 on:
   push:
@@ -37,6 +36,8 @@ jobs:
         env:
           TZ: Asia/Shanghai
         run: ${{ env.build_command }}
+      - name: Test
+        run: make test
       - name: Check images
         run: docker images
       - name: Remove dangling images
diff --git a/Makefile b/Makefile
index 08cb7d9..dec5c0c 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-.PHONY: all prepare force-build build push
+.PHONY: all prepare force-build build test push
 
 IMAGE_NAME := focs.ji.sjtu.edu.cn:5000/gitea/runner-images:focs-ubuntu-latest-slim
 
@@ -18,5 +18,8 @@ force-build: prepare
 build: prepare
 	docker build -t $(IMAGE_NAME) .
 
+test:
+	docker run --rm -it $(IMAGE_NAME) sudo -u tt -E joj3 --help
+
 push:
 	docker push $(IMAGE_NAME)