Index: Ringtoets/Common/test/Ringtoets.Common.IO.Test/Readers/XElementExtensionsTest.cs
===================================================================
diff -u -rd6ce754b71afd37c40ebcb84daca30edb566e57a -r92dcf3ff33f93a75b92ac8fcd05441ce35332edb
--- Ringtoets/Common/test/Ringtoets.Common.IO.Test/Readers/XElementExtensionsTest.cs	(.../XElementExtensionsTest.cs)	(revision d6ce754b71afd37c40ebcb84daca30edb566e57a)
+++ Ringtoets/Common/test/Ringtoets.Common.IO.Test/Readers/XElementExtensionsTest.cs	(.../XElementExtensionsTest.cs)	(revision 92dcf3ff33f93a75b92ac8fcd05441ce35332edb)
@@ -92,7 +92,7 @@
         {
             // Setup
             const string descendantElementName = "number";
-            string descendantElementValue = "1" + double.MaxValue;
+            string descendantElementValue = string.Format(CultureInfo.InvariantCulture, "1{0}", double.MaxValue);
 
             var element = new XElement("Root", new XElement(descendantElementName, descendantElementValue));