Index: Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/DerivedPipingInputTest.cs
===================================================================
diff -u -r3d995a76fbe93cf9801596e6b959e7f5bcde5805 -r99f3b343f5ac4aed453d9f6d291217de76ef5314
--- Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/DerivedPipingInputTest.cs	(.../DerivedPipingInputTest.cs)	(revision 3d995a76fbe93cf9801596e6b959e7f5bcde5805)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Data.Test/DerivedPipingInputTest.cs	(.../DerivedPipingInputTest.cs)	(revision 99f3b343f5ac4aed453d9f6d291217de76ef5314)
@@ -337,7 +337,7 @@
             var derivedInput = new DerivedPipingInput(input);
             input.StochasticSoilProfile = new StochasticSoilProfile(0.0, SoilProfileType.SoilProfile1D, 0)
             {
-                SoilProfile = new PipingSoilProfile(String.Empty, 0, new[]
+                SoilProfile = new PipingSoilProfile(string.Empty, 0, new[]
                 {
                     new PipingSoilLayer(2.0)
                     {
@@ -361,7 +361,7 @@
             var derivedInput = new DerivedPipingInput(input);
             input.StochasticSoilProfile = new StochasticSoilProfile(0.0, SoilProfileType.SoilProfile1D, 0)
             {
-                SoilProfile = new PipingSoilProfile(String.Empty, 0, new[]
+                SoilProfile = new PipingSoilProfile(string.Empty, 0, new[]
                 {
                     new PipingSoilLayer(2.0)
                     {
@@ -415,7 +415,7 @@
             var derivedInput = new DerivedPipingInput(input);
             input.StochasticSoilProfile = new StochasticSoilProfile(0.0, SoilProfileType.SoilProfile1D, 0)
             {
-                SoilProfile = new PipingSoilProfile(String.Empty, 0, new[]
+                SoilProfile = new PipingSoilProfile(string.Empty, 0, new[]
                 {
                     new PipingSoilLayer(2.0)
                     {
@@ -443,7 +443,7 @@
             var derivedInput = new DerivedPipingInput(input);
             input.StochasticSoilProfile = new StochasticSoilProfile(0.0, SoilProfileType.SoilProfile1D, 0)
             {
-                SoilProfile = new PipingSoilProfile(String.Empty, 0, new[]
+                SoilProfile = new PipingSoilProfile(string.Empty, 0, new[]
                 {
                     new PipingSoilLayer(2.0)
                     {
@@ -471,7 +471,7 @@
             var derivedInput = new DerivedPipingInput(input);
             input.StochasticSoilProfile = new StochasticSoilProfile(0.0, SoilProfileType.SoilProfile1D, 0)
             {
-                SoilProfile = new PipingSoilProfile(String.Empty, 0, new[]
+                SoilProfile = new PipingSoilProfile(string.Empty, 0, new[]
                 {
                     new PipingSoilLayer(2.5)
                     {