diff --git a/hetu-heuristic-index/src/test/java/io/hetu/core/plugin/heuristicindex/index/btree/TestBTreeIndex.java b/hetu-heuristic-index/src/test/java/io/hetu/core/plugin/heuristicindex/index/btree/TestBTreeIndex.java
index ee4cf9b3d..b3e12772f 100644
--- a/hetu-heuristic-index/src/test/java/io/hetu/core/plugin/heuristicindex/index/btree/TestBTreeIndex.java
+++ b/hetu-heuristic-index/src/test/java/io/hetu/core/plugin/heuristicindex/index/btree/TestBTreeIndex.java
@@ -306,7 +306,8 @@ public class TestBTreeIndex
         }
         File file = File.createTempFile("test-serialize-", UUID.randomUUID().toString());
         index.serialize(new FileOutputStream(file));
-        file.delete();
+
+        assertTrue(file.delete());
         index.close();
     }