diff --git a/mini-lsm-starter/src/mem_table.rs b/mini-lsm-starter/src/mem_table.rs
index d79cd9f..bfdc475 100644
--- a/mini-lsm-starter/src/mem_table.rs
+++ b/mini-lsm-starter/src/mem_table.rs
@@ -75,4 +75,5 @@ impl StorageIterator for MemTableIterator {
     }
 }
 
+#[cfg(test)]
 mod tests;