Index: DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/OperationalIntegrationTests.cs
===================================================================
diff -u -r4624 -r5520
--- DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/OperationalIntegrationTests.cs	(.../OperationalIntegrationTests.cs)	(revision 4624)
+++ DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/OperationalIntegrationTests.cs	(.../OperationalIntegrationTests.cs)	(revision 5520)
@@ -63,7 +63,7 @@
         Assert.That(output.Results.OperationalOutputTimeSeries[2].Entries.TimeSerieEntry[0].Value, Is.EqualTo(1.311).Within(tolerance));
     }
 
-    [Test, Category(Categories.WorkInProgress), Ignore("This test is not yet implemented, waits on stix implementation")]
+    [Test, Category(Categories.MultiCore), Category(Categories.WorkInProgress), Ignore("This test is not yet implemented, waits on stix implementation")]
     // This test runs the same project as Run_UsingTestFiles_HasExpectedResultsInOutputFile
     // except that it runs it with both single core and multi core.
     // The output of both runs must be the same
Index: DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/WtiPipingSellmeijerRevisedTests.cs
===================================================================
diff -u -r5257 -r5520
--- DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/WtiPipingSellmeijerRevisedTests.cs	(.../WtiPipingSellmeijerRevisedTests.cs)	(revision 5257)
+++ DamEngine/trunk/src/Deltares.DamEngine.IntegrationTests/IntegrationTests/WtiPipingSellmeijerRevisedTests.cs	(.../WtiPipingSellmeijerRevisedTests.cs)	(revision 5520)
@@ -206,7 +206,7 @@
         });
     }
 
-    [Test]
+    [Test, Category(Categories.MultiCore)]
     // This test runs the same project as CanPerformWtiDesignNoAdaptionRechterDiezedijk
     // except that it runs it with both single core and multi core.
     // The output of both runs must be the same
@@ -292,6 +292,7 @@
 
     private Output RunTestProjectCores(string calcDir, string outputFileName, int coreCount)
     {
+        Thread.CurrentThread.CurrentCulture = CultureInfo.InvariantCulture;
         if (Directory.Exists(calcDir))
         {
             Directory.Delete(calcDir, true); // delete previous results