diff --git a/test/ttl_test.cc b/test/ttl_test.cc
index db6e757..3153df9 100644
--- a/test/ttl_test.cc
+++ b/test/ttl_test.cc
@@ -124,11 +124,23 @@ TEST(TestTTL, LastLevelCompaction) {
   db->GetApproximateSizes(ranges, 1, sizes);
   ASSERT_GT(sizes[0], 0);
 
-  std::string last_level_file_num;
-  std::string last_level = "2";
-  db->GetProperty("leveldb.num-files-at-level" + last_level, &last_level_file_num);
+  int last_level_file_num = 0;
+  std::string file_num;
+  int last_level = 0;
+  for (int level = 0; level < 7; level++) {
+    db->GetProperty("leveldb.num-files-at-level" + std::to_string(level), &file_num);
+    if (std::atoi(file_num.c_str()) > 0) {
+      last_level_file_num = std::atoi(file_num.c_str());
+      last_level = level;
+    }
+    else {
+      break;
+    }
+  }
+
+  std::cout << "Last level: " << last_level << std::endl;
   std::cout << "File nums in last level: " << last_level_file_num << std::endl;
-  ASSERT_GT(std::atoi(last_level_file_num.c_str()), 0);
+  ASSERT_GT(last_level_file_num, 0);
 
   Env::Default()->SleepForMicroseconds(ttl * 1000000);