diff --git a/Sources/Model/Dice/DiceGroupManager.cs b/Sources/Model/Dice/DiceGroupManager.cs
index 785777c..3ed3f21 100644
--- a/Sources/Model/Dice/DiceGroupManager.cs
+++ b/Sources/Model/Dice/DiceGroupManager.cs
@@ -69,8 +69,8 @@ namespace Model.Dice
         /// <exception cref="ArgumentNullException"></exception>
         public KeyValuePair<string, IEnumerable<Die>> Update(KeyValuePair<string, IEnumerable<Die>> before, KeyValuePair<string, IEnumerable<Die>> after)
         {
-            // pas autorisé de changer les dés, juste le nom
-            if (!before.Value.Equals(after.Value))
+
+            if (!before.Value.ToList().Equals(after.Value.ToList()))
             {
                 throw new ArgumentException("the group of dice cannot be updated, only the name", nameof(before));
             }
diff --git a/Sources/Tests/Data_UTs/Dice/DiceGroupManagerTest.cs b/Sources/Tests/Data_UTs/Dice/DiceGroupManagerTest.cs
index 77329d5..b9ddd0b 100644
--- a/Sources/Tests/Data_UTs/Dice/DiceGroupManagerTest.cs
+++ b/Sources/Tests/Data_UTs/Dice/DiceGroupManagerTest.cs
@@ -142,6 +142,60 @@ namespace Tests.Data_UTs.Dice
             Xunit.Assert.Throws<ArgumentNullException>(action);
         }
 
+        [Fact]
+        public void TestRemoveWorksIfExists()
+        {
+            // Arrange
+            DiceGroupManager dgm = new();
+            KeyValuePair<string, IEnumerable<Die>> toAdd = new("Monopoly", new List<NumberDie> { new NumberDie(new NumberFace(5), new NumberFace(7)), new NumberDie(new NumberFace(5), new NumberFace(7)) });
+            dgm.Add(toAdd);
+            dgm.Remove(toAdd);
+
+           Xunit.Assert.DoesNotContain(toAdd, dgm.GetAll());
+        }
+
+        [Fact]
+        public void TestRemoveFailsSilentlyIfGivenNonExistent()
+        {
+            DiceGroupManager dgm = new();
+            KeyValuePair<string, IEnumerable<Die>> toAdd = new("Monopoly", new List<NumberDie> { new NumberDie(new NumberFace(5), new NumberFace(7)), new NumberDie(new NumberFace(5), new NumberFace(7)) });
+            dgm.Add(toAdd);
+
+            KeyValuePair<string, IEnumerable<Die>> toAdd2 = new("Scrabble", new List<NumberDie> { new NumberDie(new NumberFace(5), new NumberFace(7)), new NumberDie(new NumberFace(5), new NumberFace(7)) });
+
+            // Act
+            dgm.Remove(toAdd2);
+
+            // Assert
+            Xunit.Assert.DoesNotContain(toAdd2, dgm.GetAll());
+        }
+
+        [Fact]
+        public void TestUpdateWorksIfValid()
+        {
+            // Arrange
+            DiceGroupManager dgm = new();
+            KeyValuePair<string, IEnumerable<Die>> toAdd = new("Monopoly", new List<NumberDie> { new NumberDie(new NumberFace(5), new NumberFace(7)), new NumberDie(new NumberFace(5), new NumberFace(7)) });
+            dgm.Add(toAdd);
+            KeyValuePair<string, IEnumerable<Die>> toAdd2 = new("Scrabble", new List<NumberDie> { new NumberDie(new NumberFace(5), new NumberFace(7)), new NumberDie(new NumberFace(5), new NumberFace(7)) });
+            dgm.Update(toAdd, toAdd2);
+
+            Xunit.Assert.DoesNotContain(toAdd, dgm.GetAll());
+            Xunit.Assert.Contains(toAdd2, dgm.GetAll());
+            Xunit.Assert.True(dgm.GetAll().Count() == 1);
+        }
+
+
+
+
+
+
+
+
+
+
+
+
 
 
     }