diff --git a/API_SQLuedo/TestAPI/LessonUnitTest.cs b/API_SQLuedo/TestAPI/LessonUnitTest.cs
index 28e286b..152b868 100644
--- a/API_SQLuedo/TestAPI/LessonUnitTest.cs
+++ b/API_SQLuedo/TestAPI/LessonUnitTest.cs
@@ -162,6 +162,21 @@ public class LessonUnitTest
         }
     }
 
+    [Fact]
+    public void GetLessonTitleFail_Argument_Exception()
+    {
+        _lessonService.Setup(x => x.GetLessonByTitle("title"))
+            .Throws<ArgumentException>();
+        var lessonsController = new LessonsController(_lessonService.Object, new NullLogger<LessonsController>());
+
+        var result = lessonsController.GetLessonByTitle("title");
+
+        if (result is NotFoundObjectResult nfObjectResult)
+        {
+            Assert.NotNull(nfObjectResult);
+        }
+    }
+
     [Fact]
     public void DeleteLessonSuccess()
     {
@@ -230,6 +245,21 @@ public class LessonUnitTest
         }
     }
 
+    [Fact]
+    public void CreateLessonFail_Argument_Exception()
+    {
+        _lessonService.Setup(x => x.CreateLesson(35672653, "duehduheudheu nouveau titre", "Le deudhe éditeur", new DateOnly(2024, 03, 16)))
+            .Throws<ArgumentException>();
+        var lessonsController = new LessonsController(_lessonService.Object, new NullLogger<LessonsController>());
+
+        var result = lessonsController.CreateLesson(new LessonDto(35672653, "duehduheudheu nouveau titre", "Le deudhe éditeur", new DateOnly(2024, 03, 16)));
+
+        if (result is NotFoundObjectResult nfObjectResult)
+        {
+            Assert.NotNull(nfObjectResult);
+        }
+    }
+
     [Fact]
     public void UpdateLessonSuccess()
     {
diff --git a/API_SQLuedo/TestAPI/SuccessesUnitTest.cs b/API_SQLuedo/TestAPI/SuccessesUnitTest.cs
index f8dc28c..153469b 100644
--- a/API_SQLuedo/TestAPI/SuccessesUnitTest.cs
+++ b/API_SQLuedo/TestAPI/SuccessesUnitTest.cs
@@ -145,6 +145,23 @@ public class SuccessesUnitTest
         }
     }
 
+    [Fact]
+    public void GetSuccessInquiryIdFail_Argument_Exception()
+    {
+        _successService.Setup(x => x.GetSuccessesByInquiryId(1000))
+            .Throws<ArgumentException>();
+        var successesController =
+            new SuccessesController(_successService.Object, new NullLogger<SuccessesController>());
+
+        var sucessesResult = successesController.GetSuccessByInquiryId(1000);
+        if (sucessesResult is NotFoundObjectResult nfObjectResult)
+        {
+            var valeur = nfObjectResult.Value;
+
+            Assert.NotNull(valeur);
+        }
+    }
+
     [Fact]
     public void GetSuccessUserIdSuccess()
     {
@@ -217,6 +234,23 @@ public class SuccessesUnitTest
         }
     }
 
+    [Fact]
+    public void GetSuccessUserIdFail_Argument_Exception()
+    {
+        _successService.Setup(x => x.GetSuccessesByUserId(1000))
+            .Throws<ArgumentException>();
+        var successesController =
+            new SuccessesController(_successService.Object, new NullLogger<SuccessesController>());
+
+        var sucessesResult = successesController.GetSuccessByUserId(1000);
+        if (sucessesResult is NotFoundObjectResult nfObjectResult)
+        {
+            var valeur = nfObjectResult.Value;
+
+            Assert.NotNull(valeur);
+        }
+    }
+
     [Fact]
     public void DeleteSuccessSuccess()
     {
@@ -318,6 +352,22 @@ public class SuccessesUnitTest
         }
     }
 
+    [Fact]
+    public void CreateSuccessFail_Exception()
+    {
+        _successService.Setup(x => x.CreateSuccess(89889, 82837, true))
+            .Throws<Exception>();
+        var successesController =
+            new SuccessesController(_successService.Object, new NullLogger<SuccessesController>());
+
+        var successesResult = successesController.CreateSuccess(new SuccessDto(89889, 82837, true));
+
+        if (successesResult is NotFoundObjectResult notFoundObjectResult)
+        {
+            Assert.NotNull(notFoundObjectResult);
+        }
+    }
+
     [Fact]
     public void UpdateSuccessSuccess()
     {
@@ -386,6 +436,22 @@ public class SuccessesUnitTest
         }
     }
 
+    [Fact]
+    public void UpdateSuccessFail_Throw_Exception()
+    {
+        _successService.Setup(x => x.UpdateSuccess(108871, 117683, new SuccessDto(1, 2, true)))
+            .Throws<Exception>();
+        var successesController =
+            new SuccessesController(_successService.Object, new NullLogger<SuccessesController>());
+
+        var successesResult = successesController.UpdateSuccess(108871, 117683, new SuccessDto(1, 2, true));
+
+        if (successesResult is NotFoundObjectResult notFoundObjectResult)
+        {
+            Assert.NotNull(notFoundObjectResult);
+        }
+    }
+
 
 
     private List<SuccessDto> GetSuccessesData()
diff --git a/API_SQLuedo/TestAPI/UserUnitTest.cs b/API_SQLuedo/TestAPI/UserUnitTest.cs
index 6109618..848e264 100644
--- a/API_SQLuedo/TestAPI/UserUnitTest.cs
+++ b/API_SQLuedo/TestAPI/UserUnitTest.cs
@@ -171,7 +171,7 @@ public class UserUnitTest
 
 
     [Fact]
-    public void GetUserIdFail__Argument_Exception_Negative_Id()
+    public void GetUserIdFail_Negative_Id()
     {
         var userList = GetUsersData();
         _userService.Setup(x => x.GetUserById(1))
@@ -189,6 +189,22 @@ public class UserUnitTest
         }
     }
 
+    [Fact]
+    public void GetUserIdFail_Argument_Exception()
+    {
+        _userService.Setup(x => x.GetUserById(10000))
+            .Throws<ArgumentException>();
+        var usersController = new UsersController(new NullLogger<UsersController>(), _userService.Object);
+
+        var userResult = usersController.GetUserById(10000);
+        if (userResult is NotFoundObjectResult nfObjectResult)
+        {
+            var valeur = nfObjectResult.Value;
+
+            Assert.NotNull(valeur);
+        }
+    }
+
     [Fact]
     public void GetUserUsernameSuccess()
     {
@@ -212,6 +228,22 @@ public class UserUnitTest
         }
     }
 
+    [Fact]
+    public void GetUserUsernameFail_Argument_Exception()
+    {
+        _userService.Setup(x => x.GetUserByUsername("Usererererrere"))
+            .Throws<ArgumentException>();
+        var usersController = new UsersController(new NullLogger<UsersController>(), _userService.Object);
+
+        var userResult = usersController.GetUserByUsername("Usererererrere");
+        if (userResult is NotFoundObjectResult nfObjectResult)
+        {
+            var valeur = nfObjectResult.Value;
+
+            Assert.NotNull(valeur);
+        }
+    }
+
     [Fact]
     public void GetUserEmailSuccess()
     {
@@ -308,6 +340,34 @@ public class UserUnitTest
         }
     }
 
+    [Fact]
+    public void DeleteUser_By_Username_Success()
+    {
+        _userService.Setup(x => x.DeleteUserByUsername("Damn"))
+            .Returns(true);
+        var usersController = new UsersController(new NullLogger<UsersController>(), _userService.Object);
+
+        var userResult = usersController.DeleteUserByUsername("Damn");
+        if (userResult is OkObjectResult okObjectResult)
+        {
+            Assert.Null(okObjectResult.Value);
+        }
+    }
+
+    [Fact]
+    public void DeleteUser_By_Username_Failed()
+    {
+        _userService.Setup(x => x.DeleteUserByUsername("IUDHEIUHDEHUDH"))
+            .Returns(false);
+        var usersController = new UsersController(new NullLogger<UsersController>(), _userService.Object);
+
+        var userResult = usersController.DeleteUserByUsername("IUDHEIUHDEHUDH");
+        if (userResult is NotFoundObjectResult notFoundObjectResult)
+        {
+            Assert.Null(notFoundObjectResult.Value);
+        }
+    }
+
     [Fact]
     public void CreateUserSuccess()
     {