Index: Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Parsers/WaveHeightCalculationParserTest.cs
===================================================================
diff -u -r150366ef474f9522b3af857c29e3eac484910700 -rdf02e9274a94d8763da204833a4d93f984e242c6
--- Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Parsers/WaveHeightCalculationParserTest.cs	(.../WaveHeightCalculationParserTest.cs)	(revision 150366ef474f9522b3af857c29e3eac484910700)
+++ Ringtoets/HydraRing/test/Ringtoets.HydraRing.Calculation.Test/Parsers/WaveHeightCalculationParserTest.cs	(.../WaveHeightCalculationParserTest.cs)	(revision df02e9274a94d8763da204833a4d93f984e242c6)
@@ -19,7 +19,6 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
-using System;
 using System.IO;
 using Core.Common.TestUtil;
 using NUnit.Framework;
@@ -31,9 +30,15 @@
     [TestFixture]
     public class WaveHeightCalculationParserTest
     {
-        private readonly string workingDirectory = "tempDir";
+        private string workingDirectory;
         private readonly string testDataPath = Path.Combine(TestHelper.GetTestDataPath(TestDataPath.Ringtoets.HydraRing.Calculation, "Parsers"), "WaveHeightCalculationParser");
 
+        [SetUp]
+        public void SetUp()
+        {
+            workingDirectory = Path.GetRandomFileName();
+        }
+
         [Test]
         public void DefaultConstructor_SetDefaultValues()
         {