diff --git a/Src/Asp.Net/SqlServerTest/UnitTest/UOneManyMany2.cs b/Src/Asp.Net/SqlServerTest/UnitTest/UOneManyMany2.cs
index 33a1013c9..5ddcccef2 100644
--- a/Src/Asp.Net/SqlServerTest/UnitTest/UOneManyMany2.cs
+++ b/Src/Asp.Net/SqlServerTest/UnitTest/UOneManyMany2.cs
@@ -125,6 +125,16 @@ namespace OrmTest
             {
                 throw new Exception("unit error");
             }
+            var id = db.Queryable<School_002>().ToList().Last().scid;
+            db.DeleteNav<School_002>(s => s.scid == id)
+                .Include(it => it.rooms)
+                .ThenInclude(it=>it.desk).ExecuteCommand();
+
+            if (db.Queryable<Desk_002>().Count() != 2 || db.Queryable<Room_002>().Count() !=2
+          || db.Queryable<School_002>().Count() != 1|| db.Queryable<Student_002>().Count() != 0)
+            {
+                throw new Exception("unit error");
+            }
         }
 
         public class Student_002 
diff --git a/Src/Asp.Net/SqlServerTest/UnitTest/UOneManyMany5.cs b/Src/Asp.Net/SqlServerTest/UnitTest/UOneManyMany5.cs
index 980149e3c..73bbd0eac 100644
--- a/Src/Asp.Net/SqlServerTest/UnitTest/UOneManyMany5.cs
+++ b/Src/Asp.Net/SqlServerTest/UnitTest/UOneManyMany5.cs
@@ -68,6 +68,11 @@ namespace OrmTest
               .Include(x=>x.books)
               .Include(x=>x.school_001)
               .ExecuteCommand();
+
+            var id = db.Queryable<Student_004>().ToList().Last().sid;
+            db.DeleteNav<Student_004>(s => s.sid == id)
+                .Include(it => it.books)
+                .Include(it=>it.school_001).ExecuteCommand();
  
         }