diff --git a/crontab/mutex/redis/mutex_test.go b/crontab/mutex/redis/mutex_test.go
new file mode 100644
index 0000000..5265e77
--- /dev/null
+++ b/crontab/mutex/redis/mutex_test.go
@@ -0,0 +1,38 @@
+package redis
+
+import (
+	"context"
+	"testing"
+	"time"
+
+	"github.com/redis/go-redis/v9"
+	"github.com/stretchr/testify/assert"
+
+	"github.com/go-packagist/go-kratos-components/crontab"
+)
+
+var (
+	rdb = redis.NewClient(&redis.Options{
+		Addr: "localhost:6379",
+	})
+
+	ctx = context.Background()
+)
+
+func TestMutex(t *testing.T) {
+	rdb.Ping(context.Background())
+	m1 := New(rdb, WithExpired(time.Second*1))
+	m2 := New(rdb, WithExpired(time.Second*1))
+
+	assert.NoError(t, m1.Lock(ctx, "test"))
+	assert.NoError(t, m1.Lock(ctx, "test"))
+	assert.EqualError(t, m2.Lock(ctx, "test"), crontab.ErrAnotherServerRunning.Error())
+
+	time.Sleep(time.Second * 2)
+	assert.NoError(t, m2.Lock(ctx, "test"))
+	assert.EqualError(t, m1.Lock(ctx, "test"), crontab.ErrAnotherServerRunning.Error())
+
+	assert.NoError(t, m2.Unlock(ctx, "test"))
+	assert.NoError(t, m1.Lock(ctx, "test"))
+	assert.EqualError(t, m2.Lock(ctx, "test"), crontab.ErrAnotherServerRunning.Error())
+}