diff --git a/Sources/basics/Tests/TestModel/PersonTest.cs b/Sources/basics/Tests/TestModel/PersonTest.cs
index 7d3cd1d..ab91591 100644
--- a/Sources/basics/Tests/TestModel/PersonTest.cs
+++ b/Sources/basics/Tests/TestModel/PersonTest.cs
@@ -43,4 +43,18 @@ public class PersonTest
         person.FirstName = "       ";
         Assert.Equal("Jane", person.FirstName);
     }
+
+    [Theory]
+    [InlineData("Jimmy", "Jimmy")]
+    [InlineData("Jane", null)]
+    [InlineData("Jane", "")]
+    [InlineData("Jane", "     ")]
+    public void TestFirstName(string expectedName, string inputName)
+    {
+        Person person = new Person("Chuck", "McGill");
+        Assert.Equal("Chuck", person.FirstName);
+
+        person.FirstName = inputName;
+        Assert.Equal(expectedName, person.FirstName);
+    }
 }
\ No newline at end of file