diff --git a/VectoCore/VectoCoreTest/Integration/Declaration/HeavyLorry/HeavyLorrySimulation.cs b/VectoCore/VectoCoreTest/Integration/Declaration/HeavyLorry/HeavyLorrySimulation.cs
index 7254c40557ad17d9c81de8332282306fcb7abc6c..90bf6d5302cc56339404519104e298a9bd3ec67d 100644
--- a/VectoCore/VectoCoreTest/Integration/Declaration/HeavyLorry/HeavyLorrySimulation.cs
+++ b/VectoCore/VectoCoreTest/Integration/Declaration/HeavyLorry/HeavyLorrySimulation.cs
@@ -1,6 +1,6 @@
 
 
-#define singlethreaded
+//#define singlethreaded
 
 using System.Collections.Immutable;
 using System.IO;