diff --git a/servers/boe-server-all/src/main/java/com/xboe/module/exam/entity/ExamTest.java b/servers/boe-server-all/src/main/java/com/xboe/module/exam/entity/ExamTest.java
index 70f7304e..7fd293bc 100644
--- a/servers/boe-server-all/src/main/java/com/xboe/module/exam/entity/ExamTest.java
+++ b/servers/boe-server-all/src/main/java/com/xboe/module/exam/entity/ExamTest.java
@@ -1,6 +1,5 @@
 package com.xboe.module.exam.entity;
 
-import java.math.BigInteger;
 import java.time.LocalDateTime;
 
 import javax.persistence.Column;