diff --git a/core/src/main/java/com/alibaba/datax/core/Engine.java b/core/src/main/java/com/alibaba/datax/core/Engine.java
index 64aa4874..4e2a4b5b 100755
--- a/core/src/main/java/com/alibaba/datax/core/Engine.java
+++ b/core/src/main/java/com/alibaba/datax/core/Engine.java
@@ -253,7 +253,7 @@ public class Engine {
 
     //todo 都是用同一个文件，是否需要考虑线程安全问题
     public static void startJobByJsonStr(String jobJson) {
-        String tmpFilePath = "jobTmp.conf";
+        String tmpFilePath = "jobTmp.conf-"+ System.currentTimeMillis();
         // 根据json写入到临时本地文件
         PrintWriter writer = null;
         try {
diff --git a/core/src/main/java/com/alibaba/datax/core/Cli.java b/core/src/test/java/Cli.java
similarity index 98%
rename from core/src/main/java/com/alibaba/datax/core/Cli.java
rename to core/src/test/java/Cli.java
index 82141a14..09c3cea1 100644
--- a/core/src/main/java/com/alibaba/datax/core/Cli.java
+++ b/core/src/test/java/Cli.java
@@ -1,5 +1,3 @@
-package com.alibaba.datax.core;
-
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
diff --git a/core/src/test/java/TimeTest.java b/core/src/test/java/TimeTest.java
new file mode 100644
index 00000000..0cdbb3dd
--- /dev/null
+++ b/core/src/test/java/TimeTest.java
@@ -0,0 +1,11 @@
+/**
+ * @program: datax-all
+ * @description:
+ * @author: huzekang
+ * @create: 2019-05-07 22:02
+ **/
+public class TimeTest {
+    public static void main(String[] args) {
+        System.out.println(System.currentTimeMillis());
+    }
+}