diff --git a/Sources/UnitTesting/JetonUT.cs b/Sources/UnitTesting/JetonUT.cs
index 902983f..f55fc8c 100644
--- a/Sources/UnitTesting/JetonUT.cs
+++ b/Sources/UnitTesting/JetonUT.cs
@@ -31,12 +31,14 @@ namespace UnitTesting
 
             Assert.False(j2.Equals(j3));
             Assert.False(j2 == j3);
+            Assert.True(j2 != j3);
 
             Jeton j4 = new Jeton(Couleur.Jaune);
             Jeton j5 = new Jeton(Couleur.Jaune);
 
             Assert.True(j4.Equals(j5));
             Assert.True(j4 == j5);
+            Assert.False(j4 != j5);
         }
     }
 }