diff --git a/db/db_impl.cc b/db/db_impl.cc
index de87e07..72526c1 100644
--- a/db/db_impl.cc
+++ b/db/db_impl.cc
@@ -602,9 +602,9 @@ void DBImpl::CompactRange(const Slice* begin, const Slice* end) {
 void DBImpl::TEST_CompactRange(int level, const Slice* begin,
                                const Slice* end) {
   assert(level >= 0);
-  assert(level <= config::kNumLevels);
+  assert(level < config::kNumLevels);
 
-  if (level == config::kNumLevels) {
+  if (level + 1 == config::kNumLevels) {
     // TTL: TODO: update files in the last level
     return;
   }