Physics Unit Test

Hi,
I try to perform a simulation step inside a unit test with the following code:

Code (CSharp):

1.        
2. [Test]
3. public void BasicPhysicsWorldTest() {
4.     DefaultWorldInitialization.Initialize("Test World", false);
5.  
6.     ScriptBehaviourUpdateOrder.UpdatePlayerLoop(null);
7.  
8.     World.Active.Update();
9.  
10.     ref var physicsWorld = ref World.Active.GetExistingSystem<BuildPhysicsWorld>().PhysicsWorld;
11.  
12.     var localPhysicsWorld = (PhysicsWorld)physicsWorld.Clone();
13.  
14.     var simulation = new Simulation();
15.  
16.     SimulationStepInput stepInput = CreateSimulationStepInput(localPhysicsWorld);
17.  
18.     try {
19.         localPhysicsWorld.CollisionWorld.ScheduleUpdateDynamicLayer(ref localPhysicsWorld, stepInput.TimeStep, stepInput.ThreadCountHint, new JobHandle()).Complete();
20.  
21.         simulation.Step(stepInput);
22.     } finally {
23.         localPhysicsWorld.Dispose();
24.         simulation.Dispose();
25.     }
26.  
27.     World.Active.Dispose();
28. }
29.  

However, running the test only results in an exception: "TypeLoadException: Recursive type definition detected"
Am I doing something wrong or is it impossible to run the simulation step inside a unit test?

Thanks,
Markus