diff --git a/test/ttl_test.cc b/test/ttl_test.cc
index fdf882d..2e875f8 100644
--- a/test/ttl_test.cc
+++ b/test/ttl_test.cc
@@ -40,41 +40,41 @@ void GetData(DB *db, int size = (1 << 30)) {
   }
 }
 
-// TEST(TestTTL, ReadTTL) {
-//     DB *db;
-//     if(OpenDB("testdb", &db).ok() == false) {
-//         std::cerr << "open db failed" << std::endl;
-//         abort();
-//     }
-
-//     uint64_t ttl = 20;
-
-//     InsertData(db, ttl);
-
-//     ReadOptions readOptions;
-//     Status status;
-//     int key_num = data_size / value_size;
-//     srand(0);
-//     for (int i = 0; i < 100; i++) {
-//         int key_ = rand() % key_num+1;
-//         std::string key = std::to_string(key_);
-//         std::string value;
-//         status = db->Get(readOptions, key, &value);
-//         ASSERT_TRUE(status.ok());
-//     }
-
-//     Env::Default()->SleepForMicroseconds(ttl * 1000000);
-
-//     for (int i = 0; i < 100; i++) {
-//         int key_ = rand() % key_num+1;
-//         std::string key = std::to_string(key_);
-//         std::string value;
-//         status = db->Get(readOptions, key, &value);
-//         ASSERT_FALSE(status.ok());
-//     }
-
-//     delete db;
-// }
+TEST(TestTTL, ReadTTL) {
+    DB *db;
+    if(OpenDB("testdb", &db).ok() == false) {
+        std::cerr << "open db failed" << std::endl;
+        abort();
+    }
+
+    uint64_t ttl = 20;
+
+    InsertData(db, ttl);
+
+    ReadOptions readOptions;
+    Status status;
+    int key_num = data_size / value_size;
+    srand(0);
+    for (int i = 0; i < 100; i++) {
+        int key_ = rand() % key_num+1;
+        std::string key = std::to_string(key_);
+        std::string value;
+        status = db->Get(readOptions, key, &value);
+        ASSERT_TRUE(status.ok());
+    }
+
+    Env::Default()->SleepForMicroseconds(ttl * 1000000);
+
+    for (int i = 0; i < 100; i++) {
+        int key_ = rand() % key_num+1;
+        std::string key = std::to_string(key_);
+        std::string value;
+        status = db->Get(readOptions, key, &value);
+        ASSERT_FALSE(status.ok());
+    }
+
+    delete db;
+}
 
 TEST(TestTTL, CompactionTTL) {
     DB *db;