diff --git a/src/main/java/org/tron/core/UTXOSet.java b/src/main/java/org/tron/core/UTXOSet.java
index 69ad56126b4..057a8d732c4 100644
--- a/src/main/java/org/tron/core/UTXOSet.java
+++ b/src/main/java/org/tron/core/UTXOSet.java
@@ -18,23 +18,21 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 import org.tron.crypto.ECKey;
-import org.tron.storage.leveldb.LevelDbDataSourceImpl;
 import org.tron.protos.core.TronTXOutput;
 import org.tron.protos.core.TronTXOutputs;
 import org.tron.protos.core.TronTXOutputs.TXOutputs;
+import org.tron.storage.leveldb.LevelDbDataSourceImpl;
 import org.tron.utils.ByteArray;
 
 import javax.inject.Inject;
 import javax.inject.Named;
 import java.util.*;
 
-import static org.tron.core.Constant.TRANSACTION_DB_NAME;
-
 public class UTXOSet {
     private static final Logger logger = LoggerFactory.getLogger("UTXOSet");
 
     private Blockchain blockchain;
-    private LevelDbDataSourceImpl txDB = null;
+    private LevelDbDataSourceImpl txDB;
 
     @Inject
     public UTXOSet(@Named("transaction") LevelDbDataSourceImpl txDb) {
@@ -62,7 +60,7 @@ public void reindex() {
             String key = entry.getKey();
             TXOutputs value = entry.getValue();
 
-            for (TronTXOutput.TXOutput txOutput : value.getOutputsList()) {
+            for (TronTXOutput.TXOutput ignored : value.getOutputsList()) {
                 txDB.putData(ByteArray.fromHexString(key), value.toByteArray());
             }
         }
diff --git a/src/test/java/org/tron/core/UTXOSetTest.java b/src/test/java/org/tron/core/UTXOSetTest.java
new file mode 100644
index 00000000000..2a1b8b888f8
--- /dev/null
+++ b/src/test/java/org/tron/core/UTXOSetTest.java
@@ -0,0 +1,43 @@
+package org.tron.core;
+
+import org.junit.Test;
+import org.mockito.Mockito;
+import org.tron.protos.core.TronTXOutput;
+import org.tron.protos.core.TronTXOutputs;
+import org.tron.storage.leveldb.LevelDbDataSourceImpl;
+import org.tron.utils.ByteArray;
+
+import java.util.HashMap;
+import java.util.UUID;
+
+import static org.mockito.Matchers.any;
+import static org.mockito.Matchers.eq;
+import static org.mockito.Mockito.times;
+import static org.mockito.Mockito.when;
+
+public class UTXOSetTest {
+    @Test
+    public void testReindex() {
+        String key = "15f3988aa8d56eab3bfca45144bad77fc60acce50437a0a9d794a03a83c15c5e";
+        TronTXOutput.TXOutput testOutput = TronTXOutput.TXOutput.newBuilder().build();
+        TronTXOutputs.TXOutputs testOutputs = TronTXOutputs.TXOutputs.newBuilder()
+                .addOutputs(testOutput)
+                .build();
+
+        HashMap<String, TronTXOutputs.TXOutputs> testUTXO = new HashMap<>();
+        testUTXO.put(key, testOutputs);
+
+        Blockchain mockBlockchain = Mockito.mock(Blockchain.class);
+        when(mockBlockchain.findUTXO()).thenReturn(testUTXO);
+
+        LevelDbDataSourceImpl mockTransactionDb = Mockito.mock(LevelDbDataSourceImpl.class);
+
+        UTXOSet utxoSet = new UTXOSet(mockTransactionDb);
+        utxoSet.setBlockchain(mockBlockchain);
+
+        utxoSet.reindex();
+        Mockito.verify(mockTransactionDb, times(1)).resetDB();
+        Mockito.verify(mockTransactionDb, times(1))
+                .putData(eq(ByteArray.fromHexString(key)), eq(testOutputs.toByteArray()));
+    }
+}