diff --git a/API_SQLuedo/TestEF/EntitiesTests/ConcreteContentLessonEntity.cs b/API_SQLuedo/TestEF/EntitiesTests/ConcreteContentLessonEntity.cs
new file mode 100644
index 0000000..15789eb
--- /dev/null
+++ b/API_SQLuedo/TestEF/EntitiesTests/ConcreteContentLessonEntity.cs
@@ -0,0 +1,21 @@
+using Entities;
+
+namespace TestEF.EntitiesTests;
+
+public class ConcreteContentLessonEntity : ContentLessonEntity
+{
+    public ConcreteContentLessonEntity(int id, string contentContent, string contentTitle)
+        : base(id, contentContent, contentTitle)
+    {
+    }
+
+    public ConcreteContentLessonEntity(int id, int lessonId, string contentContent, string contentTitle)
+        : base(id, lessonId, contentContent, contentTitle)
+    {
+    }
+
+    public ConcreteContentLessonEntity(string contentContent, string contentTitle)
+        : base(contentContent, contentTitle)
+    {
+    }
+}
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diff --git a/API_SQLuedo/TestEF/EntitiesTests/TestContentLessonEntity.cs b/API_SQLuedo/TestEF/EntitiesTests/TestContentLessonEntity.cs
new file mode 100644
index 0000000..6d2bd7e
--- /dev/null
+++ b/API_SQLuedo/TestEF/EntitiesTests/TestContentLessonEntity.cs
@@ -0,0 +1,55 @@
+namespace TestEF.EntitiesTests;
+
+public class TestContentLessonEntity
+{
+    [Fact]
+    public void Constructor_ShouldSetProperties_WhenCalledWithTwoParameters()
+    {
+        // Arrange
+        const string contentContent = "Content";
+        const string contentTitle = "Title";
+
+        // Act
+        var concreteContentLessonEntity = new ConcreteContentLessonEntity(contentContent, contentTitle);
+
+        // Assert
+        Assert.Equal(contentContent, concreteContentLessonEntity.ContentContent);
+        Assert.Equal(contentTitle, concreteContentLessonEntity.ContentTitle);
+    }
+
+    [Fact]
+    public void Constructor_ShouldSetProperties_WhenCalledWithThreeParameters()
+    {
+        // Arrange
+        const int id = 1;
+        const string contentContent = "Content";
+        const string contentTitle = "Title";
+
+        // Act
+        var concreteContentLessonEntity = new ConcreteContentLessonEntity(id, contentContent, contentTitle);
+
+        // Assert
+        Assert.Equal(id, concreteContentLessonEntity.Id);
+        Assert.Equal(contentContent, concreteContentLessonEntity.ContentContent);
+        Assert.Equal(contentTitle, concreteContentLessonEntity.ContentTitle);
+    }
+
+    [Fact]
+    public void Constructor_ShouldSetProperties_WhenCalledWithFourParameters()
+    {
+        // Arrange
+        const int id = 1;
+        const int lessonId = 2;
+        const string contentContent = "Content";
+        const string contentTitle = "Title";
+
+        // Act
+        var concreteContentLessonEntity = new ConcreteContentLessonEntity(id, lessonId, contentContent, contentTitle);
+
+        // Assert
+        Assert.Equal(id, concreteContentLessonEntity.Id);
+        Assert.Equal(lessonId, concreteContentLessonEntity.LessonId);
+        Assert.Equal(contentContent, concreteContentLessonEntity.ContentContent);
+        Assert.Equal(contentTitle, concreteContentLessonEntity.ContentTitle);
+    }
+}
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