Index: Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/TreeNodeInfos/HeightStructuresCalculationContextTreeNodeInfoTest.cs
===================================================================
diff -u -r543721804bf58d098ee833d1a023a6e0018f1452 -r7c857a9d25bf11581d83514bda0d31413eca8dd3
--- Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/TreeNodeInfos/HeightStructuresCalculationContextTreeNodeInfoTest.cs	(.../HeightStructuresCalculationContextTreeNodeInfoTest.cs)	(revision 543721804bf58d098ee833d1a023a6e0018f1452)
+++ Ringtoets/HeightStructures/test/Ringtoets.HeightStructures.Plugin.Test/TreeNodeInfos/HeightStructuresCalculationContextTreeNodeInfoTest.cs	(.../HeightStructuresCalculationContextTreeNodeInfoTest.cs)	(revision 7c857a9d25bf11581d83514bda0d31413eca8dd3)
@@ -1018,12 +1018,12 @@
                     {
                         string[] msgs = messages.ToArray();
                         Assert.AreEqual(6, msgs.Length);
-                        StringAssert.StartsWith(string.Format("Validatie van '{0}' gestart om: ", calculation.Name), msgs[0]);
-                        StringAssert.StartsWith(string.Format("Validatie van '{0}' beëindigd om: ", calculation.Name), msgs[1]);
-                        StringAssert.StartsWith(string.Format("Berekening van '{0}' gestart om: ", calculation.Name), msgs[2]);
+                        StringAssert.StartsWith($"Validatie van '{calculation.Name}' gestart om: ", msgs[0]);
+                        StringAssert.StartsWith($"Validatie van '{calculation.Name}' beëindigd om: ", msgs[1]);
+                        StringAssert.StartsWith($"Berekening van '{calculation.Name}' gestart om: ", msgs[2]);
                         StringAssert.StartsWith("Hoogte kunstwerk berekening is uitgevoerd op de tijdelijke locatie", msgs[3]);
-                        StringAssert.StartsWith(string.Format("Berekening van '{0}' beëindigd om: ", calculation.Name), msgs[4]);
-                        StringAssert.StartsWith(string.Format("Uitvoeren van '{0}' is gelukt.", calculation.Name), msgs[5]);
+                        StringAssert.StartsWith($"Berekening van '{calculation.Name}' beëindigd om: ", msgs[4]);
+                        StringAssert.StartsWith($"Uitvoeren van '{calculation.Name}' is gelukt.", msgs[5]);
                     });
 
                     Assert.AreNotSame(initialOutput, calculation.Output);
@@ -1082,8 +1082,8 @@
                     {
                         string[] msgs = messages.ToArray();
                         Assert.AreEqual(2, msgs.Length);
-                        StringAssert.StartsWith(string.Format("Validatie van '{0}' gestart om: ", calculation.Name), msgs[0]);
-                        StringAssert.StartsWith(string.Format("Validatie van '{0}' beëindigd om: ", calculation.Name), msgs[1]);
+                        StringAssert.StartsWith($"Validatie van '{calculation.Name}' gestart om: ", msgs[0]);
+                        StringAssert.StartsWith($"Validatie van '{calculation.Name}' beëindigd om: ", msgs[1]);
                     });
                 }
             }