diff --git a/Qwirkle/QwirkleClassLibrary/Tiles/TileBag.cs b/Qwirkle/QwirkleClassLibrary/Tiles/TileBag.cs
index 44c7129..291a4d0 100644
--- a/Qwirkle/QwirkleClassLibrary/Tiles/TileBag.cs
+++ b/Qwirkle/QwirkleClassLibrary/Tiles/TileBag.cs
@@ -14,7 +14,7 @@ namespace QwirkleClassLibrary.Tiles
         [DataMember]
         private readonly List<Tile> tiles = [];
         
-        public ReadOnlyCollection<Tile> TilesBag { get; private set; }
+        public ReadOnlyCollection<Tile>? TilesBag { get; private set; }
         
 
         /// <summary>
diff --git a/Qwirkle/TestBase/TestPlayer.cs b/Qwirkle/TestBase/TestPlayer.cs
index 5c2b92a..fbf2147 100644
--- a/Qwirkle/TestBase/TestPlayer.cs
+++ b/Qwirkle/TestBase/TestPlayer.cs
@@ -7,7 +7,7 @@ public class TestPlayers
         [Theory]
         [InlineData(true, "Mathis")]
         [InlineData(false, null)]
-        public void Test_CreatePlayer(bool isValid, string playertag)
+        public void Test_CreatePlayer(bool isValid, string? playertag)
         {
             if (!isValid)
             {