diff --git a/NUnitTests/T_Serv_YearsAndPeriodsManagement.cs b/NUnitTests/T_Serv_YearsAndPeriodsManagement.cs
index 00b8c90..d341d29 100644
--- a/NUnitTests/T_Serv_YearsAndPeriodsManagement.cs
+++ b/NUnitTests/T_Serv_YearsAndPeriodsManagement.cs
@@ -26,34 +26,38 @@ public void T_SchoolYears_Create()
             Assert.That(Test_Commons.dl.SchoolYearExists(sy.IdSchoolYear));
             Test_Commons.dl.DeleteSchoolYear(sy.IdSchoolYear);
         }
+
         [Test]
         public void T_SchoolYears_Read()
         {
             // test of DataLayer Methods that read data from table SchoolYears
             bool test = Test_Commons.dl.SchoolYearExists("17-18");
-            Assert.That(test = true);   //in teoria se � true significa che quell anno esiste
+            Assert.That(test = true);   //in teoria se �è true significa che quell anno esiste
         }
         [Test]
         public void T_SchoolYears_Update(/*SchoolYear schoolYear*/)
         {
             SchoolYear schoolYear1 = new();
-            schoolYear1.IdSchoolYear = "11-12";
+            schoolYear1.IdSchoolYear = "27-28";
             schoolYear1.ShortDescription = "2023-2024";
-            schoolYear1.Notes = "Anno scolastico introdotto per sola prova";
-            // test of DataLayer Methods that update data from table SchoolYears           
+            schoolYear1.Notes = "Anno scolastico introdotto per sola prova";  // test of DataLayer Methods that update data from table SchoolYears
+            Assert.That(!Test_Commons.dl.SchoolYearExists(schoolYear1.IdSchoolYear));
             Test_Commons.dl.AddSchoolYear(schoolYear1);
             Assert.That(Test_Commons.dl.SchoolYearExists(schoolYear1.IdSchoolYear));
+            Test_Commons.dl.DeleteSchoolYear(schoolYear1.IdSchoolYear);
+            
+
         }
         [Test]
         public void T_SchoolYears_Delete()
         {
             // test of DataLayer Methods that delete data from table SchoolYears           
             SchoolYear schoolYear1 = new();
-            schoolYear1.IdSchoolYear = "23-24";
+            schoolYear1.IdSchoolYear = "27-28";
             schoolYear1.ShortDescription = "2024-2025";
-            schoolYear1.Notes = "Anno scolastico introdotto per sola prova";
-            Test_Commons.dl.AddSchoolYear(schoolYear1);
-            Test_Commons.dl.DeleteTable("SchoolYears");
+            schoolYear1.Notes = "Anno scolastico introdotto per sola prova";            
+            //Test_Commons.dl.AddSchoolYear(schoolYear1);
+            Test_Commons.dl.DeleteSchoolYear("SchoolYears");
             Assert.That(!Test_Commons.dl.ExistsTable("SchoolYears"));
         }
     }