diff --git a/Src/Asp.NetCore2/OracleTest/UnitTest/UnitBulkMerge.cs b/Src/Asp.NetCore2/OracleTest/UnitTest/UnitBulkMerge.cs
index 56fc27c14..11ba9f70c 100644
--- a/Src/Asp.NetCore2/OracleTest/UnitTest/UnitBulkMerge.cs
+++ b/Src/Asp.NetCore2/OracleTest/UnitTest/UnitBulkMerge.cs
@@ -15,14 +15,36 @@ namespace OrmTest
                 .BulkMerge(new List<UnitaafdsTest>() { new UnitaafdsTest() { Id=Guid.NewGuid()
                 , CreateTime=DateTime.Now, Name="a"} });
             var list=db.Queryable<UnitaafdsTest>().ToList();
+            if (list[0].Name != "a") { throw new Exception("unit error"); }
             list[0].Name = "j";
             var count2 = db.Fastest<UnitaafdsTest>()
              .BulkMerge(list);
             var list2 = db.Queryable<UnitaafdsTest>().ToList();
+            if (list2[0].Name != "j"|| count2!=1) { throw new Exception("unit error"); }
+            list2.Add(new UnitaafdsTest()
+            {
+                Id = Guid.NewGuid() ,
+                CreateTime = DateTime.Now,
+                Name = "a"
+            });
+            list2.Add(new UnitaafdsTest()
+            {
+                Id = Guid.NewGuid() ,
+                CreateTime = DateTime.Now,
+                Name = "a"
+            });
+            db.Fastest<UnitaafdsTest>()
+                .BulkMerge(list2);
+            var count3 = db.Queryable<UnitaafdsTest>()
+            .Count();
+            if (count3 != 3) 
+            {
+                throw new Exception("unit error");
+            }
             for (int i = 0; i < 1000; i++)
             {
                 db.Fastest<UnitaafdsTest>()
-         .BulkMerge(list); 
+               .BulkMerge(list);
             }
         }
     }