diff --git a/.drone.yml b/.drone.yml
deleted file mode 100644
index 9f009f4..0000000
--- a/.drone.yml
+++ /dev/null
@@ -1,31 +0,0 @@
----
-kind: pipeline
-type: ssh
-name: CI
-server:
-    host: 111.186.59.59
-    user: drone
-    ssh_key:
-        from_secret: joj3-test
-
-steps:
-    - name: prepare
-      commands:
-          - go env -w GOPROXY=https://goproxy.cn,direct
-          - whoami
-          - pwd
-          - env
-          - go version
-          - go env
-          - git status -v
-          - git log -1
-    - name: build
-      commands:
-          - make
-    - name: test
-      commands:
-          - make prepare-test
-          - make test
-    - name: store
-      commands:
-          - cp build/joj3 /home/drone/.local/bin/joj3
diff --git a/.gitea/workflows/test.yaml b/.gitea/workflows/test.yaml
new file mode 100644
index 0000000..a7a5081
--- /dev/null
+++ b/.gitea/workflows/test.yaml
@@ -0,0 +1,44 @@
+---
+name: checks
+on:
+    - push
+    - pull_request
+
+jobs:
+    build:
+        container:
+            image: focs.ji.sjtu.edu.cn:5000/gitea/runner-images:ubuntu-latest
+            volumes:
+                - /home/actions/.ssh:/root/.ssh
+        steps:
+            - name: Check out repository code
+              uses: https://gitea.com/BoYanZh/checkout@focs
+            - name: Setup Go 1.23.1
+              run: |
+                  wget -q https://studygolang.com/dl/golang/go1.23.1.linux-amd64.tar.gz
+                  rm -rf /usr/local/go
+                  tar -C /usr/local -xzf go1.23.1.linux-amd64.tar.gz
+                  rm -rf go1.23.1.linux-amd64.tar.gz
+                  echo "PATH=$PATH:/usr/local/go/bin:/root/go/bin" >> $GITHUB_ENV
+            - name: Display Go version
+              run: go version
+            - name: Prepare
+              run: |
+                  go env -w GO111MODULE=on
+                  go env -w GOPROXY=https://goproxy.io,direct
+                  chown -R root:root /root/.ssh
+            - name: Setup golangci-lint
+              run: |
+                  wget -q https://ghp.ci/https://github.com/golangci/golangci-lint/releases/download/v1.61.0/golangci-lint-1.61.0-linux-amd64.tar.gz
+                  tar -C /tmp -xzf golangci-lint-1.61.0-linux-amd64.tar.gz
+                  rm -rf golangci-lint-1.61.0-linux-amd64.tar.gz
+                  mkdir -p /root/go/bin
+                  mv /tmp/golangci-lint-1.61.0-linux-amd64/golangci-lint /root/go/bin
+            - name: Lint
+              run: make lint
+            - name: Build
+              run: make build
+            - name: Test
+              run: |
+                  make prepare-test
+                  make ci-test
diff --git a/Makefile b/Makefile
index cea7f45..f54d3c0 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,4 @@
-.PHONY: all build clean prepare-test test
+.PHONY: all build clean lint prepare-test test ci-test
 
 BUILD_DIR = ./build
 TMP_DIR = ./tmp
@@ -15,9 +15,17 @@ clean:
 	rm -rf $(TMP_DIR)/*
 	rm -rf *.out
 
+lint:
+	golangci-lint run
+
 prepare-test:
 	git submodule update --init --remote
 
 test:
 	./scripts/prepare_test_repos.sh $(TMP_DIR)
 	go test -coverprofile cover.out -v ./...
+
+ci-test:
+	./scripts/prepare_test_repos.sh $(TMP_DIR)
+	./scripts/run_foreach_test_repos.sh $(TMP_DIR) "sed -i '2i \ \ \"sandboxExecServer\": \"172.17.0.1:5051\",' conf.json"
+	go test -coverprofile cover.out -v ./...
diff --git a/internal/stage/model.go b/internal/stage/model.go
index cb33462..dba945a 100644
--- a/internal/stage/model.go
+++ b/internal/stage/model.go
@@ -3,7 +3,6 @@ package stage
 import (
 	"fmt"
 	"strconv"
-	"time"
 
 	"github.com/criyle/go-judge/envexec"
 )
@@ -126,8 +125,8 @@ func (r ExecutorResult) String() string {
 		Status     Status
 		ExitStatus int
 		Error      string
-		Time       time.Duration
-		RunTime    time.Duration
+		Time       uint64
+		RunTime    uint64
 		Memory     envexec.Size
 		Files      map[string]string
 		FileIDs    map[string]string
@@ -137,8 +136,8 @@ func (r ExecutorResult) String() string {
 		Status:     r.Status,
 		ExitStatus: r.ExitStatus,
 		Error:      r.Error,
-		Time:       time.Duration(r.Time),
-		RunTime:    time.Duration(r.RunTime),
+		Time:       r.Time,
+		RunTime:    r.RunTime,
 		Memory:     envexec.Size(r.Memory),
 		Files:      make(map[string]string),
 		FileIDs:    r.FileIDs,