Index: Riskeer/Piping/src/Riskeer.Piping.Data/PipingInput.cs
===================================================================
diff -u -r834475416d51381db0067470bbce8dc1800f831e -r9bac82bab68867670a2f2dcd41bf9ee29ebf2da9
--- Riskeer/Piping/src/Riskeer.Piping.Data/PipingInput.cs	(.../PipingInput.cs)	(revision 834475416d51381db0067470bbce8dc1800f831e)
+++ Riskeer/Piping/src/Riskeer.Piping.Data/PipingInput.cs	(.../PipingInput.cs)	(revision 9bac82bab68867670a2f2dcd41bf9ee29ebf2da9)
@@ -37,7 +37,7 @@
     /// <summary>
     /// Base class for piping calculation specific input parameters, i.e. values that can differ across various calculations.
     /// </summary>
-    public class PipingInput : CloneableObservable, ICalculationInputWithHydraulicBoundaryLocation
+    public abstract class PipingInput : CloneableObservable, ICalculationInputWithHydraulicBoundaryLocation
     {
         private readonly GeneralPipingInput generalInputParameters;
         private NormalDistribution phreaticLevelExit;
@@ -53,7 +53,7 @@
         /// piping calculations.</param>
         /// <exception cref="ArgumentNullException">Thrown when <paramref name="generalInputParameters"/>
         /// is <c>null</c>.</exception>
-        public PipingInput(GeneralPipingInput generalInputParameters)
+        protected PipingInput(GeneralPipingInput generalInputParameters)
         {
             if (generalInputParameters == null)
             {
Index: Riskeer/Piping/test/Riskeer.Piping.Data.TestUtil/TestPipingInput.cs
===================================================================
diff -u
--- Riskeer/Piping/test/Riskeer.Piping.Data.TestUtil/TestPipingInput.cs	(revision 0)
+++ Riskeer/Piping/test/Riskeer.Piping.Data.TestUtil/TestPipingInput.cs	(revision 9bac82bab68867670a2f2dcd41bf9ee29ebf2da9)
@@ -0,0 +1,45 @@
+// 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 System;
+
+namespace Riskeer.Piping.Data.TestUtil
+{
+    /// <summary>
+    /// Piping input that can be used for testing.
+    /// </summary>
+    public class TestPipingInput : PipingInput
+    {
+        /// <summary>
+        /// Creates a new instance of <see cref="TestPipingInput"/> with default <see cref="GeneralPipingInput"/>.
+        /// </summary>
+        public TestPipingInput() : base(new GeneralPipingInput()) {}
+
+        /// <summary>
+        /// Creates a new instance of <see cref="TestPipingInput"/>.
+        /// </summary>
+        /// <param name="generalInputParameters">General piping calculation parameters that are the same across all
+        /// piping calculations.</param>
+        /// <exception cref="ArgumentNullException">Thrown when <paramref name="generalInputParameters"/>
+        /// is <c>null</c>.</exception>
+        public TestPipingInput(GeneralPipingInput generalInputParameters) : base(generalInputParameters) {}
+    }
+}
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