diff --git a/Qwirkle/TestBase/TestPersistence.cs b/Qwirkle/TestBase/TestPersistence.cs
index d0fdb9d..cf29910 100644
--- a/Qwirkle/TestBase/TestPersistence.cs
+++ b/Qwirkle/TestBase/TestPersistence.cs
@@ -16,7 +16,7 @@ namespace TestBase
             var gamePersistence = new GamePersistenceXml();
             gamePersistence.SaveGame(game);
 
-            Assert.True(File.Exists("Game.json"));
+            Assert.True(File.Exists("Game.xml"));
         }
 
         [Fact]