diff --git a/VectoCore/VectoCoreTest/Integration/CompletedBus/CompletedBusFactorMethodTest.cs b/VectoCore/VectoCoreTest/Integration/CompletedBus/CompletedBusFactorMethodTest.cs
index 168b3e09abb94dffbda6b73408aa24c81a85c99b..3bf7ba451e78027431459e1940c175309046b55f 100644
--- a/VectoCore/VectoCoreTest/Integration/CompletedBus/CompletedBusFactorMethodTest.cs
+++ b/VectoCore/VectoCoreTest/Integration/CompletedBus/CompletedBusFactorMethodTest.cs
@@ -941,6 +941,7 @@ namespace TUGraz.VectoCore.Tests.Integration.CompletedBus
 
 		private void SetRelatedVehicleParts(List<VectoRunData> runs)
 		{
+			relatedRuns.Clear();
 			for (int i = 0; i < runs.Count; i++)
 			{
 				var relatedRun = new RelatedRun