diff --git a/API_SQLuedo/EntityFramework/LessonEntity.cs b/API_SQLuedo/EntityFramework/LessonEntity.cs
index 902465e..bf6e499 100644
--- a/API_SQLuedo/EntityFramework/LessonEntity.cs
+++ b/API_SQLuedo/EntityFramework/LessonEntity.cs
@@ -6,25 +6,8 @@ namespace Entities;
 public class LessonEntity
 {
     public int Id { get; set; }
-    public string? Title { get; set; }
-    public string? LastPublisher { get; set; }
+    public string Title { get; set; }
+    public string LastPublisher { get; set; }
     public DateOnly? LastEdit { get; set; }
     public ICollection<ContentLessonEntity> Content { get; set; } = new List<ContentLessonEntity>();
-
-    public LessonEntity() { }
-
-    public LessonEntity(int id, string title, string lastPublisher, DateOnly? lastEdit)
-    {
-        Id = id;
-        Title = title;
-        LastPublisher = lastPublisher;
-        LastEdit = lastEdit;
-    }
-
-    public LessonEntity(string title, string lastPublisher, DateOnly? lastEdit)
-    {
-        Title = title;
-        LastPublisher = lastPublisher;
-        LastEdit = lastEdit;
-    }
 }
\ No newline at end of file
diff --git a/API_SQLuedo/Shared/LessonDataService.cs b/API_SQLuedo/Shared/LessonDataService.cs
index e37b67e..da7713c 100644
--- a/API_SQLuedo/Shared/LessonDataService.cs
+++ b/API_SQLuedo/Shared/LessonDataService.cs
@@ -35,7 +35,7 @@ public class LessonDataService : ILessonDataService
                 break;
         }
         var lessons = query.ToList();
-        return lessons.Select(s => s.FromEntityToDTO());
+        return lessons.Select(s => s.FromEntityToDto());
     }
 
     public LessonDTO GetLessonById(int id)
@@ -46,7 +46,7 @@ public class LessonDataService : ILessonDataService
             throw new ArgumentException("Impossible de trouver la leçon", nameof(id));
         }
 
-        return lessonEntity.FromEntityToDTO();
+        return lessonEntity.FromEntityToDto();
     }
 
     public LessonDTO GetLessonByTitle(string title)
@@ -57,7 +57,7 @@ public class LessonDataService : ILessonDataService
             throw new ArgumentException("Impossible de trouver la leçon", nameof(title));
         }
 
-        return lessonEntity.FromEntityToDTO();
+        return lessonEntity.FromEntityToDto();
     }
 
     public bool DeleteLesson(int id)
@@ -85,7 +85,7 @@ public class LessonDataService : ILessonDataService
         updatingLesson.LastPublisher = lesson.LastPublisher;
         updatingLesson.LastEdit = lesson.LastEdit;
         DbContext.SaveChangesAsync();
-        return updatingLesson.FromEntityToDTO();
+        return updatingLesson.FromEntityToDto();
     }
 
     public LessonDTO CreateLesson(string title, string lastPublisher, DateOnly? lastEdit)
@@ -96,7 +96,7 @@ public class LessonDataService : ILessonDataService
             LastPublisher = lastPublisher,
             LastEdit = lastEdit,
         };
-        DbContext.Lessons.Add(newLessonEntity.FromDTOToEntity());
+        DbContext.Lessons.Add(newLessonEntity.FromDtoToEntity());
         DbContext.SaveChangesAsync();
         return newLessonEntity;
     }
diff --git a/API_SQLuedo/Shared/Mapper/LessonMapper.cs b/API_SQLuedo/Shared/Mapper/LessonMapper.cs
index 80fdcb7..68380e1 100644
--- a/API_SQLuedo/Shared/Mapper/LessonMapper.cs
+++ b/API_SQLuedo/Shared/Mapper/LessonMapper.cs
@@ -6,27 +6,39 @@ namespace Shared.Mapper;
 
 public static class LessonMapper
 {
-    public static LessonDTO FromModelToDTO(this Lesson model)
+    public static LessonDTO FromModelToDto(this Lesson model)
     {
         return new LessonDTO(model.Id, model.Title, model.LastPublisher, model.LastEdit);
     }
 
-    public static LessonDTO FromEntityToDTO(this LessonEntity model)
+    public static LessonDTO FromEntityToDto(this LessonEntity model)
     {
         return new LessonDTO(model.Id, model.Title, model.LastPublisher, model.LastEdit);
     }
 
     public static LessonEntity FromModelToEntity(this Lesson model)
     {
-        return new LessonEntity(model.Id, model.Title, model.LastPublisher, model.LastEdit);
+        return new LessonEntity
+        {
+            Id = model.Id,
+            Title = model.Title,
+            LastPublisher = model.LastPublisher,
+            LastEdit = model.LastEdit
+        };
     }
 
-    public static LessonEntity FromDTOToEntity(this LessonDTO dto)
+    public static LessonEntity FromDtoToEntity(this LessonDTO dto)
     {
-        return new LessonEntity(dto.Id, dto.Title, dto.LastPublisher, dto.LastEdit);
+        return new LessonEntity
+        {
+            Id = dto.Id,
+            Title = dto.Title,
+            LastPublisher = dto.LastPublisher,
+            LastEdit = dto.LastEdit
+        };
     }
 
-    public static Lesson FromDTOToModel(this LessonDTO dto)
+    public static Lesson FromDtoToModel(this LessonDTO dto)
     {
         return new Lesson(dto.Id, dto.Title, dto.LastPublisher, dto.LastEdit);
     }
diff --git a/API_SQLuedo/TestEF/EntitiesTests/TestLessonEntity.cs b/API_SQLuedo/TestEF/EntitiesTests/TestLessonEntity.cs
index 42a02d1..d77278b 100644
--- a/API_SQLuedo/TestEF/EntitiesTests/TestLessonEntity.cs
+++ b/API_SQLuedo/TestEF/EntitiesTests/TestLessonEntity.cs
@@ -1,14 +1,13 @@
 using Entities;
-using Microsoft.VisualBasic;
 
-namespace TestEF;
+namespace TestEF.EntitiesTests;
 
 public class TestLessonEntity
 {
-    private const int _id = 42;
-    private const string _title = "Title";
-    private const string _lastPublisher = "Last Publisher";
-    private static DateOnly _lastEdit = new DateOnly();
+    private const int Id = 42;
+    private const string Title = "Title";
+    private const string LastPublisher = "Last Publisher";
+    private static readonly DateOnly LastEdit = new ();
 
     [Fact]
     public void TestDefaultConstructor()
@@ -19,24 +18,35 @@ public class TestLessonEntity
         Assert.Null(lesson.LastPublisher);
         Assert.Null(lesson.LastEdit);
     }
-    
+
     [Fact]
     public void TestConstructorWithoutId()
     {
-        LessonEntity lesson = new LessonEntity(_title,_lastPublisher,_lastEdit);
+        LessonEntity lesson = new LessonEntity
+        {
+            Title = Title,
+            LastPublisher = LastPublisher,
+            LastEdit = LastEdit
+        };
         Assert.Equal(0, lesson.Id);
-        Assert.Equal(_title,lesson.Title);
-        Assert.Equal(_lastPublisher,lesson.LastPublisher);
-        Assert.Equal(_lastEdit,lesson.LastEdit);
+        Assert.Equal(Title, lesson.Title);
+        Assert.Equal(LastPublisher, lesson.LastPublisher);
+        Assert.Equal(LastEdit, lesson.LastEdit);
     }
-    
+
     [Fact]
     public void TestConstructorWithAllAttributes()
     {
-        LessonEntity lesson = new LessonEntity(_id,_title,_lastPublisher,_lastEdit);
-        Assert.Equal(_id, lesson.Id);
-        Assert.Equal(_title,lesson.Title);
-        Assert.Equal(_lastPublisher,lesson.LastPublisher);
-        Assert.Equal(_lastEdit,lesson.LastEdit);
+        LessonEntity lesson = new LessonEntity
+        {
+            Id = Id,
+            Title = Title,
+            LastPublisher = LastPublisher,
+            LastEdit = LastEdit
+        };
+        Assert.Equal(Id, lesson.Id);
+        Assert.Equal(Title, lesson.Title);
+        Assert.Equal(LastPublisher, lesson.LastPublisher);
+        Assert.Equal(LastEdit, lesson.LastEdit);
     }
 }
\ No newline at end of file