diff --git a/Sources/UnitTesting/CodeCompletExceptionUT.cs b/Sources/UnitTesting/CodeCompletExceptionUT.cs
index cafd51a..c378396 100644
--- a/Sources/UnitTesting/CodeCompletExceptionUT.cs
+++ b/Sources/UnitTesting/CodeCompletExceptionUT.cs
@@ -1,4 +1,5 @@
 using CoreLibrary.Exceptions;
+using System.Reflection;
 using System.Runtime.Serialization;
 using System.Runtime.Serialization.Formatters.Binary;
 using System.Text.Json;
@@ -68,6 +69,17 @@ namespace UnitTesting
             #pragma warning restore SYSLIB0051
 
             Assert.Equal(exception.Message, info.GetString("Message"));
+
+            #pragma warning disable SYSLIB0050
+            CodeCompletException exceptionSerialisee = 
+                (CodeCompletException) FormatterServices.GetUninitializedObject(typeof(CodeCompletException));
+            #pragma warning restore SYSLIB0050
+
+            ConstructorInfo? constructeur = typeof(CodeCompletException).GetConstructor(BindingFlags.Instance | BindingFlags.NonPublic, null, new[] { typeof(SerializationInfo), typeof(StreamingContext) }, null);
+            Assert.NotNull(constructeur);
+            constructeur.Invoke(exceptionSerialisee, [info, contexte]);
+
+            Assert.Equal(exception.Message, exceptionSerialisee.Message);
         }
     }
 }