Index: Ringtoets/Piping/test/Ringtoets.Piping.KernelWrapper.TestUtil.Test/SubCalculator/UpliftCalculatorStubTest.cs
===================================================================
diff -u -r85fcfb3e47d742a46200fcfb93f7cd4b155b9a94 -r913ebbe5aaf7355a6242dfb4a3168a7c6ff98d36
--- Ringtoets/Piping/test/Ringtoets.Piping.KernelWrapper.TestUtil.Test/SubCalculator/UpliftCalculatorStubTest.cs	(.../UpliftCalculatorStubTest.cs)	(revision 85fcfb3e47d742a46200fcfb93f7cd4b155b9a94)
+++ Ringtoets/Piping/test/Ringtoets.Piping.KernelWrapper.TestUtil.Test/SubCalculator/UpliftCalculatorStubTest.cs	(.../UpliftCalculatorStubTest.cs)	(revision 913ebbe5aaf7355a6242dfb4a3168a7c6ff98d36)
@@ -19,7 +19,9 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
 using System.Collections.Generic;
+using Deltares.WTIPiping;
 using NUnit.Framework;
 using Ringtoets.Piping.KernelWrapper.TestUtil.SubCalculator;
 
@@ -35,6 +37,7 @@
             var upliftCalculator = new UpliftCalculatorStub();
 
             // Assert
+            Assert.IsFalse(upliftCalculator.ThrowExceptionOnCalculate);
             Assert.AreEqual(0, upliftCalculator.EffectiveStress);
             Assert.AreEqual(0, upliftCalculator.HExit);
             Assert.AreEqual(0, upliftCalculator.HRiver);
@@ -43,7 +46,6 @@
             Assert.AreEqual(0, upliftCalculator.PhiPolder);
             Assert.AreEqual(0, upliftCalculator.RExit);
             Assert.AreEqual(0, upliftCalculator.VolumetricWeightOfWater);
-
             Assert.AreEqual(0, upliftCalculator.FoSu);
             Assert.AreEqual(0, upliftCalculator.Zu);
         }
@@ -74,5 +76,24 @@
             // Assert
             Assert.IsTrue(upliftCalculator.Calculated);
         }
+
+        [Test]
+        public void Calculate_ThrowExceptionOnCalculateTrue_ThrowWTIUpliftCalculatorException()
+        {
+            // Setup
+            var upliftCalculator = new UpliftCalculatorStub
+            {
+                ThrowExceptionOnCalculate = true
+            };
+
+            // Call
+            TestDelegate test = () => upliftCalculator.Calculate();
+
+            // Assert
+            var exception = Assert.Throws<WTIUpliftCalculatorException>(test);
+            Assert.IsNull(exception.InnerException);
+            Assert.AreEqual($"Message 1{Environment.NewLine}Message 2", exception.Message);
+            Assert.IsFalse(upliftCalculator.Calculated);
+        }
     }
 }
\ No newline at end of file
Index: Ringtoets/Piping/test/Ringtoets.Piping.KernelWrapper.TestUtil/SubCalculator/UpliftCalculatorStub.cs
===================================================================
diff -u -r81fa8a9bf3bd503cbd280e88b8f6037a840cff12 -r913ebbe5aaf7355a6242dfb4a3168a7c6ff98d36
--- Ringtoets/Piping/test/Ringtoets.Piping.KernelWrapper.TestUtil/SubCalculator/UpliftCalculatorStub.cs	(.../UpliftCalculatorStub.cs)	(revision 81fa8a9bf3bd503cbd280e88b8f6037a840cff12)
+++ Ringtoets/Piping/test/Ringtoets.Piping.KernelWrapper.TestUtil/SubCalculator/UpliftCalculatorStub.cs	(.../UpliftCalculatorStub.cs)	(revision 913ebbe5aaf7355a6242dfb4a3168a7c6ff98d36)
@@ -19,7 +19,9 @@
 // Stichting Deltares and remain full property of Stichting Deltares at all times.
 // All rights reserved.
 
+using System;
 using System.Collections.Generic;
+using Deltares.WTIPiping;
 using Ringtoets.Piping.KernelWrapper.SubCalculator;
 
 namespace Ringtoets.Piping.KernelWrapper.TestUtil.SubCalculator
@@ -39,6 +41,11 @@
         /// </summary>
         public bool Validated { get; private set; }
 
+        /// <summary>
+        /// Indicator whether an exception must be thrown when performing the calculation.
+        /// </summary>
+        public bool ThrowExceptionOnCalculate { get; set; }
+
         public double EffectiveStress { get; set; }
         public double HExit { get; set; }
         public double HRiver { get; set; }
@@ -52,6 +59,11 @@
 
         public void Calculate()
         {
+            if (ThrowExceptionOnCalculate)
+            {
+                throw new WTIUpliftCalculatorException($"Message 1{Environment.NewLine}Message 2");
+            }
+
             Calculated = true;
         }