Index: Ringtoets/Piping/test/Ringtoets.Piping.Integration.Test/PipingFailureMechanismResultViewIntegrationTest.cs
===================================================================
diff -u -r81fa8a9bf3bd503cbd280e88b8f6037a840cff12 -r081badaad87a6e2a6d5c861de9ee95fa1ca6dea3
--- Ringtoets/Piping/test/Ringtoets.Piping.Integration.Test/PipingFailureMechanismResultViewIntegrationTest.cs	(.../PipingFailureMechanismResultViewIntegrationTest.cs)	(revision 81fa8a9bf3bd503cbd280e88b8f6037a840cff12)
+++ Ringtoets/Piping/test/Ringtoets.Piping.Integration.Test/PipingFailureMechanismResultViewIntegrationTest.cs	(.../PipingFailureMechanismResultViewIntegrationTest.cs)	(revision 081badaad87a6e2a6d5c861de9ee95fa1ca6dea3)
@@ -126,15 +126,15 @@
                 pipingCalculation1.NotifyObservers();
                 Assert.AreEqual(string.Format("1/{0:N0}", 1.0 / pipingCalculation1.Probability),
                                 dataGridView.Rows[22].Cells[assessmentLayerTwoAIndex].FormattedValue);
-                Assert.AreEqual(string.Empty, dataGridView.Rows[22].Cells[assessmentLayerTwoAIndex].ErrorText);
+                Assert.IsEmpty(dataGridView.Rows[22].Cells[assessmentLayerTwoAIndex].ErrorText);
 
                 // Add another, nested calculation without surface line and ensure the data grid view is updated when the surface line is set
                 var pipingCalculation3 = new PipingCalculationScenario(new GeneralPipingInput());
                 nestedPipingCalculationGroup.Children.Add(pipingCalculation3);
                 nestedPipingCalculationGroup.NotifyObservers();
                 Assert.AreEqual(string.Format("1/{0:N0}", 1.0 / pipingCalculation1.Probability),
                                 dataGridView.Rows[22].Cells[assessmentLayerTwoAIndex].FormattedValue);
-                Assert.AreEqual(string.Empty, dataGridView.Rows[22].Cells[assessmentLayerTwoAIndex].ErrorText);
+                Assert.IsEmpty(dataGridView.Rows[22].Cells[assessmentLayerTwoAIndex].ErrorText);
 
                 pipingCalculation3.InputParameters.SurfaceLine = assessmentSection.PipingFailureMechanism.SurfaceLines.First(
                     sl => sl.Name == "PK001_0001");
@@ -168,7 +168,7 @@
                 pipingCalculation1.NotifyObservers();
                 Assert.AreEqual(string.Format("1/{0:N0}", 1.0 / pipingCalculation1.Probability),
                                 dataGridView.Rows[22].Cells[assessmentLayerTwoAIndex].FormattedValue);
-                Assert.AreEqual(string.Empty, dataGridView.Rows[22].Cells[assessmentLayerTwoAIndex].ErrorText);
+                Assert.IsEmpty(dataGridView.Rows[22].Cells[assessmentLayerTwoAIndex].ErrorText);
 
                 // Clear the output of the calculation and make sure the data grid view is updated
                 PipingDataSynchronizationService.ClearCalculationOutput(pipingCalculation1);