diff --git a/API_SQLuedo/TestAPI/LessonUnitTest.cs b/API_SQLuedo/TestAPI/LessonUnitTest.cs
index e2d9b10..a96fa9d 100644
--- a/API_SQLuedo/TestAPI/LessonUnitTest.cs
+++ b/API_SQLuedo/TestAPI/LessonUnitTest.cs
@@ -63,7 +63,55 @@ namespace TestAPI
         }
 
 
+        [Fact]
+        public void GetLessonIdSuccess()
+        {
+            var lessonList = GetLessonsData();
+            lessonService.Setup(x => x.GetLessonById(1))
+                .Returns(lessonList[0]);
+            var LessonsController = new LessonsController(lessonService.Object, new NullLogger<LessonsController>());
+
+            var lessonsResult = LessonsController.GetLessonById(1);
+            if (lessonsResult is OkObjectResult okObjectResult)
+            {
+                LessonDTO valeur = okObjectResult.Value as LessonDTO;
+
+                Assert.NotNull(valeur);
+                Assert.Equal("Le titre", valeur.Title);
+                Assert.Equal("Clément", valeur.LastPublisher);
+                Assert.Equal(new DateOnly(2024, 03, 10), valeur.LastEdit);
+                Assert.NotEqual(2, valeur.Id);
+
+
+                Assert.Equal(valeur.GetHashCode(), lessonList[0].GetHashCode());
+                Assert.True(valeur.Equals(lessonList[0]));
+                Assert.False(valeur.Equals(new object()));
+                Assert.True(valeur.Equals(valeur));
+                Assert.IsType<LessonDTO>(valeur);
+                Assert.Contains(valeur, lessonList);
+            }
+
+        }
 
+        [Fact]
+        public void GetLessonIdFail()
+        {
+            var lessonList = GetLessonsData();
+            lessonService.Setup(x => x.GetLessonById(1))
+                .Returns(lessonList[0]);
+            var LessonsController = new LessonsController(lessonService.Object, new NullLogger<LessonsController>());
+
+            var lessonsResult = LessonsController.GetLessonById(100);
+            if (lessonsResult is NotFoundObjectResult NFObjectResult)
+            {
+                var valeur = NFObjectResult.Value;
+
+                Assert.NotNull(valeur);
+                Assert.IsNotType<LessonDTO>(valeur);
+                Assert.DoesNotContain(valeur, lessonList);
+            }
+
+        }