diff --git a/src/Tests/ECS/Github/Test_GitHub_56.cs b/src/Tests/ECS/Github/Test_GitHub_56.cs
new file mode 100644
index 00000000..ce72275b
--- /dev/null
+++ b/src/Tests/ECS/Github/Test_GitHub_56.cs
@@ -0,0 +1,36 @@
+/*
+using Friflo.Engine.ECS;
+using NUnit.Framework;
+
+// ReSharper disable InconsistentNaming
+namespace Tests.ECS.Github {
+
+// https://github.com/friflo/Friflo.Json.Fliox/issues/56    
+public struct CompA : IComponent
+{
+    public float2 goalLS;
+}
+
+public struct float2
+{
+    public float3 xyz{get;set;} // Error CS0523 : Struct member 'float2.xyz' of type 'float3' causes a cycle in the struct layout
+};
+
+public struct float3
+{
+    public float2 xy{get;set;}  // Error CS0523 : Struct member 'float3.xy' of type 'float2' causes a cycle in the struct layout
+};
+
+public static class Test_GitHub_56
+{
+    [Test]
+    public static void Test_Serialize_enum_component_2()
+    {
+        var store = new EntityStore();
+        Entity entity = store.CreateEntity(1);
+        entity.AddComponent(new CompA { goalLS = new float2 { xyz = new float3 { }} });
+    }
+}
+
+}
+*/
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