Index: Riskeer/StabilityStoneCover/test/Riskeer.StabilityStoneCover.Data.Test/Riskeer.StabilityStoneCover.Data.Test.csproj
===================================================================
diff -u -rd0e327ebc28f8e3ef5ffa3c4da5f299b2f305381 -r31f2c71a7fda01e69ef2dc98eb248ef7d4b312c4
--- Riskeer/StabilityStoneCover/test/Riskeer.StabilityStoneCover.Data.Test/Riskeer.StabilityStoneCover.Data.Test.csproj	(.../Riskeer.StabilityStoneCover.Data.Test.csproj)	(revision d0e327ebc28f8e3ef5ffa3c4da5f299b2f305381)
+++ Riskeer/StabilityStoneCover/test/Riskeer.StabilityStoneCover.Data.Test/Riskeer.StabilityStoneCover.Data.Test.csproj	(.../Riskeer.StabilityStoneCover.Data.Test.csproj)	(revision 31f2c71a7fda01e69ef2dc98eb248ef7d4b312c4)
@@ -25,8 +25,11 @@
     <PackageReference Include="NUnit">
       <Version>3.8.1</Version>
     </PackageReference>
-    <PackageReference Include="RhinoMocks">
-      <Version>3.6.1</Version>
+    <PackageReference Include="NSubstitute">
+      <Version>4.4.0</Version>
     </PackageReference>
+    <PackageReference Include="NSubstitute.Analyzers.CSharp">
+      <Version>1.0.16</Version>
+    </PackageReference>
   </ItemGroup>
 </Project>
\ No newline at end of file
Index: Riskeer/StabilityStoneCover/test/Riskeer.StabilityStoneCover.Data.Test/StabilityStoneCoverFailureMechanismTest.cs
===================================================================
diff -u -r9339a780307cdb21ebe38cbd3aa8811e2c98d980 -r31f2c71a7fda01e69ef2dc98eb248ef7d4b312c4
--- Riskeer/StabilityStoneCover/test/Riskeer.StabilityStoneCover.Data.Test/StabilityStoneCoverFailureMechanismTest.cs	(.../StabilityStoneCoverFailureMechanismTest.cs)	(revision 9339a780307cdb21ebe38cbd3aa8811e2c98d980)
+++ Riskeer/StabilityStoneCover/test/Riskeer.StabilityStoneCover.Data.Test/StabilityStoneCoverFailureMechanismTest.cs	(.../StabilityStoneCoverFailureMechanismTest.cs)	(revision 31f2c71a7fda01e69ef2dc98eb248ef7d4b312c4)
@@ -22,7 +22,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using NUnit.Framework;
-using Rhino.Mocks;
+using NSubstitute;
 using Riskeer.Common.Data.Calculation;
 using Riskeer.Common.Data.FailureMechanism;
 
@@ -59,7 +59,6 @@
         public void Calculations_MultipleChildrenAdded_ReturnStabilityStoneCoverWaveConditionsCalculations()
         {
             // Setup
-            var mocks = new MockRepository();
             var failureMechanism = new StabilityStoneCoverFailureMechanism
             {
                 CalculationsGroup =
@@ -68,21 +67,18 @@
                     {
                         new CalculationGroup(),
                         new StabilityStoneCoverWaveConditionsCalculation(),
-                        mocks.StrictMock<ICalculation>(),
+                        Substitute.For<ICalculation>(),
                         new StabilityStoneCoverWaveConditionsCalculation()
                     }
                 }
             };
 
-            mocks.ReplayAll();
-
             // Call
             List<ICalculation> calculations = failureMechanism.Calculations.ToList();
 
             // Assert
             Assert.AreEqual(2, calculations.Count);
             Assert.IsTrue(calculations.All(c => c is StabilityStoneCoverWaveConditionsCalculation));
-            mocks.VerifyAll();
         }
     }
 }
\ No newline at end of file
Index: Riskeer/WaveImpactAsphaltCover/test/Riskeer.WaveImpactAsphaltCover.Data.Test/Riskeer.WaveImpactAsphaltCover.Data.Test.csproj
===================================================================
diff -u -rd0e327ebc28f8e3ef5ffa3c4da5f299b2f305381 -r31f2c71a7fda01e69ef2dc98eb248ef7d4b312c4
--- Riskeer/WaveImpactAsphaltCover/test/Riskeer.WaveImpactAsphaltCover.Data.Test/Riskeer.WaveImpactAsphaltCover.Data.Test.csproj	(.../Riskeer.WaveImpactAsphaltCover.Data.Test.csproj)	(revision d0e327ebc28f8e3ef5ffa3c4da5f299b2f305381)
+++ Riskeer/WaveImpactAsphaltCover/test/Riskeer.WaveImpactAsphaltCover.Data.Test/Riskeer.WaveImpactAsphaltCover.Data.Test.csproj	(.../Riskeer.WaveImpactAsphaltCover.Data.Test.csproj)	(revision 31f2c71a7fda01e69ef2dc98eb248ef7d4b312c4)
@@ -22,8 +22,11 @@
     <PackageReference Include="NUnit">
       <Version>3.8.1</Version>
     </PackageReference>
-    <PackageReference Include="RhinoMocks">
-      <Version>3.6.1</Version>
+    <PackageReference Include="NSubstitute">
+      <Version>4.4.0</Version>
     </PackageReference>
+    <PackageReference Include="NSubstitute.Analyzers.CSharp">
+      <Version>1.0.16</Version>
+    </PackageReference>
   </ItemGroup>
 </Project>
\ No newline at end of file
Index: Riskeer/WaveImpactAsphaltCover/test/Riskeer.WaveImpactAsphaltCover.Data.Test/WaveImpactAsphaltCoverFailureMechanismTest.cs
===================================================================
diff -u -r9339a780307cdb21ebe38cbd3aa8811e2c98d980 -r31f2c71a7fda01e69ef2dc98eb248ef7d4b312c4
--- Riskeer/WaveImpactAsphaltCover/test/Riskeer.WaveImpactAsphaltCover.Data.Test/WaveImpactAsphaltCoverFailureMechanismTest.cs	(.../WaveImpactAsphaltCoverFailureMechanismTest.cs)	(revision 9339a780307cdb21ebe38cbd3aa8811e2c98d980)
+++ Riskeer/WaveImpactAsphaltCover/test/Riskeer.WaveImpactAsphaltCover.Data.Test/WaveImpactAsphaltCoverFailureMechanismTest.cs	(.../WaveImpactAsphaltCoverFailureMechanismTest.cs)	(revision 31f2c71a7fda01e69ef2dc98eb248ef7d4b312c4)
@@ -22,7 +22,7 @@
 using System.Collections.Generic;
 using System.Linq;
 using NUnit.Framework;
-using Rhino.Mocks;
+using NSubstitute;
 using Riskeer.Common.Data.Calculation;
 using Riskeer.Common.Data.FailureMechanism;
 
@@ -59,7 +59,6 @@
         public void Calculations_MultipleChildrenAdded_ReturnWaveImpactAsphaltCoverCalculations()
         {
             // Setup
-            var mocks = new MockRepository();
             var failureMechanism = new WaveImpactAsphaltCoverFailureMechanism
             {
                 CalculationsGroup =
@@ -68,21 +67,18 @@
                     {
                         new CalculationGroup(),
                         new WaveImpactAsphaltCoverWaveConditionsCalculation(),
-                        mocks.StrictMock<ICalculation>(),
+                        Substitute.For<ICalculation>(),
                         new WaveImpactAsphaltCoverWaveConditionsCalculation()
                     }
                 }
             };
 
-            mocks.ReplayAll();
-
             // Call
             List<ICalculation> calculations = failureMechanism.Calculations.ToList();
 
             // Assert
             Assert.AreEqual(2, calculations.Count);
             Assert.IsTrue(calculations.All(c => c is WaveImpactAsphaltCoverWaveConditionsCalculation));
-            mocks.VerifyAll();
         }
     }
 }
\ No newline at end of file