Index: Ringtoets/Revetment/test/Ringtoets.Revetment.Service.Test/WaveConditionsCalculationServiceBaseTest.cs
===================================================================
diff -u -r736f04ea6f24399148ab8efd7f3b03ae8f8f56b5 -rbb8a619893b78cc8081813837bb5123d3af1e40d
--- Ringtoets/Revetment/test/Ringtoets.Revetment.Service.Test/WaveConditionsCalculationServiceBaseTest.cs	(.../WaveConditionsCalculationServiceBaseTest.cs)	(revision 736f04ea6f24399148ab8efd7f3b03ae8f8f56b5)
+++ Ringtoets/Revetment/test/Ringtoets.Revetment.Service.Test/WaveConditionsCalculationServiceBaseTest.cs	(.../WaveConditionsCalculationServiceBaseTest.cs)	(revision bb8a619893b78cc8081813837bb5123d3af1e40d)
@@ -475,7 +475,7 @@
                 new WaveConditionsCalculationService().PublicCalculate(a, b, c, norm, input, hcldFilePath, calculationName);
 
                 // Assert
-                for (var i = 0; i < input.WaterLevels.Count(); i++)
+                for (var i = 0; i < nrOfCalculators; i++)
                 {
                     WaveConditionsCosineCalculationInput expectedInput = CreateInput(input.WaterLevels.ElementAt(i), a, b, c, norm, input, useForeshore, useBreakWater);
                     HydraRingDataEqualityHelper.AreEqual(expectedInput, calculator.ReceivedInputs[i]);