Index: Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.CalculatedInput.TestUtil/CalculatorInputAssert.cs
===================================================================
diff -u -rd9005dfa3b398d70ada0cf03cf408f8bcfc384db -r686c5eeaad900a6bb627733de8c21bd607f130aa
--- Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.CalculatedInput.TestUtil/CalculatorInputAssert.cs	(.../CalculatorInputAssert.cs)	(revision d9005dfa3b398d70ada0cf03cf408f8bcfc384db)
+++ Ringtoets/MacroStabilityInwards/test/Ringtoets.MacroStabilityInwards.CalculatedInput.TestUtil/CalculatorInputAssert.cs	(.../CalculatorInputAssert.cs)	(revision 686c5eeaad900a6bb627733de8c21bd607f130aa)
@@ -41,7 +41,7 @@
         /// does not correspond to <paramref name="original"/>.</exception>
         public static void AssertSoilProfile(IMacroStabilityInwardsSoilProfileUnderSurfaceLine original, SoilProfile actual)
         {
-            IMacroStabilityInwardsSoilLayer2D[] expectedLayers = original.Layers.ToArray();
+            MacroStabilityInwardsSoilLayer2D[] expectedLayers = original.Layers.ToArray();
             SoilLayer[] actualLayers = actual.Layers.ToArray();
 
             IMacroStabilityInwardsPreconsolidationStress[] expectedPreconsolidationStresses = original.PreconsolidationStresses.ToArray();
@@ -102,11 +102,11 @@
         /// <summary>
         /// Asserts whether <paramref name="actual"/> corresponds to <paramref name="original"/>.
         /// </summary>
-        /// <param name="original">The original <see cref="IMacroStabilityInwardsSoilLayer2D"/> array.</param>
+        /// <param name="original">The original <see cref="MacroStabilityInwardsSoilLayer2D"/> array.</param>
         /// <param name="actual">The actual <see cref="SoilLayer"/> array.</param>
         /// <exception cref="AssertionException">Thrown when <paramref name="actual"/>
         /// does not correspond to <paramref name="original"/>.</exception>
-        private static void AssertLayers(IMacroStabilityInwardsSoilLayer2D[] original, SoilLayer[] actual)
+        private static void AssertLayers(MacroStabilityInwardsSoilLayer2D[] original, SoilLayer[] actual)
         {
             Assert.AreEqual(original.Length, actual.Length);