Index: Riskeer/Piping/src/Riskeer.Piping.Data/SemiProbabilistic/SemiProbabilisticPipingCalculation.cs
===================================================================
diff -u -raa29b0cfa44fd8c5e980e8def584675c3200c4c5 -rc416b83a0c6793ff4f298f9c16762d8c4ecec318
--- Riskeer/Piping/src/Riskeer.Piping.Data/SemiProbabilistic/SemiProbabilisticPipingCalculation.cs	(.../SemiProbabilisticPipingCalculation.cs)	(revision aa29b0cfa44fd8c5e980e8def584675c3200c4c5)
+++ Riskeer/Piping/src/Riskeer.Piping.Data/SemiProbabilistic/SemiProbabilisticPipingCalculation.cs	(.../SemiProbabilisticPipingCalculation.cs)	(revision c416b83a0c6793ff4f298f9c16762d8c4ecec318)
@@ -22,14 +22,14 @@
 namespace Riskeer.Piping.Data.SemiProbabilistic
 {
     /// <summary>
-    /// This class holds information about a semi-probabilistic calculation for the <see cref="PipingFailureMechanism"/>.
+    /// Base class that holds information about a semi-probabilistic calculation for the <see cref="PipingFailureMechanism"/>.
     /// </summary>
-    public class SemiProbabilisticPipingCalculation : PipingCalculation<SemiProbabilisticPipingInput>
+    public abstract class SemiProbabilisticPipingCalculation : PipingCalculation<SemiProbabilisticPipingInput>
     {
         /// <summary>
         /// Creates a new instance of <see cref="SemiProbabilisticPipingCalculation"/>.
         /// </summary>
-        public SemiProbabilisticPipingCalculation() : base(new SemiProbabilisticPipingInput()) {}
+        protected SemiProbabilisticPipingCalculation() : base(new SemiProbabilisticPipingInput()) {}
 
         public override bool HasOutput => Output != null;
 
Index: Riskeer/Piping/test/Riskeer.Piping.Data.Test/SemiProbabilistic/SemiProbabilisticPipingCalculationTest.cs
===================================================================
diff -u -raa29b0cfa44fd8c5e980e8def584675c3200c4c5 -rc416b83a0c6793ff4f298f9c16762d8c4ecec318
--- Riskeer/Piping/test/Riskeer.Piping.Data.Test/SemiProbabilistic/SemiProbabilisticPipingCalculationTest.cs	(.../SemiProbabilisticPipingCalculationTest.cs)	(revision aa29b0cfa44fd8c5e980e8def584675c3200c4c5)
+++ Riskeer/Piping/test/Riskeer.Piping.Data.Test/SemiProbabilistic/SemiProbabilisticPipingCalculationTest.cs	(.../SemiProbabilisticPipingCalculationTest.cs)	(revision c416b83a0c6793ff4f298f9c16762d8c4ecec318)
@@ -33,7 +33,7 @@
         public void Constructor_ExpectedValues()
         {
             // Call
-            var calculation = new SemiProbabilisticPipingCalculation();
+            var calculation = new TestSemiProbabilisticPipingCalculation();
 
             // Assert
             Assert.IsInstanceOf<PipingCalculation<SemiProbabilisticPipingInput>>(calculation);
@@ -46,7 +46,7 @@
         public void HasOutput_OutputNull_ReturnsFalse()
         {
             // Setup
-            var calculation = new SemiProbabilisticPipingCalculation
+            var calculation = new TestSemiProbabilisticPipingCalculation
             {
                 Output = null
             };
@@ -62,7 +62,7 @@
         public void HasOutput_OutputSet_ReturnsTrue()
         {
             // Setup
-            var calculation = new SemiProbabilisticPipingCalculation
+            var calculation = new TestSemiProbabilisticPipingCalculation
             {
                 Output = PipingTestDataGenerator.GetRandomSemiProbabilisticPipingOutput()
             };
@@ -78,7 +78,7 @@
         public void ClearOutput_Always_SetsOutputToNull()
         {
             // Setup
-            var calculation = new SemiProbabilisticPipingCalculation
+            var calculation = new TestSemiProbabilisticPipingCalculation
             {
                 Output = PipingTestDataGenerator.GetRandomSemiProbabilisticPipingOutput()
             };
@@ -120,7 +120,7 @@
 
         private static SemiProbabilisticPipingCalculation CreateRandomCalculationWithoutOutput()
         {
-            var calculation = new SemiProbabilisticPipingCalculation
+            var calculation = new TestSemiProbabilisticPipingCalculation
             {
                 Name = "Random name",
                 Comments =
Index: Riskeer/Piping/test/Riskeer.Piping.Data.TestUtil/TestSemiProbabilisticPipingCalculation.cs
===================================================================
diff -u
--- Riskeer/Piping/test/Riskeer.Piping.Data.TestUtil/TestSemiProbabilisticPipingCalculation.cs	(revision 0)
+++ Riskeer/Piping/test/Riskeer.Piping.Data.TestUtil/TestSemiProbabilisticPipingCalculation.cs	(revision c416b83a0c6793ff4f298f9c16762d8c4ecec318)
@@ -0,0 +1,30 @@
+// Copyright (C) Stichting Deltares 2019. All rights reserved.
+//
+// This file is part of Riskeer.
+//
+// Riskeer is free software: you can redistribute it and/or modify
+// it under the terms of the GNU General Public License as published by
+// the Free Software Foundation, either version 3 of the License, or
+// (at your option) any later version.
+// 
+// This program is distributed in the hope that it will be useful,
+// but WITHOUT ANY WARRANTY; without even the implied warranty of
+// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+// GNU General Public License for more details.
+//
+// You should have received a copy of the GNU General Public License
+// along with this program. If not, see <http://www.gnu.org/licenses/>.
+//
+// All names, logos, and references to "Deltares" are registered trademarks of
+// Stichting Deltares and remain full property of Stichting Deltares at all times.
+// All rights reserved.
+
+using Riskeer.Piping.Data.SemiProbabilistic;
+
+namespace Riskeer.Piping.Data.TestUtil
+{
+    /// <summary>
+    /// Semi-probabilistic piping calculation for testing purposes.
+    /// </summary>
+    public class TestSemiProbabilisticPipingCalculation : SemiProbabilisticPipingCalculation {}
+}
\ No newline at end of file