diff --git a/src/Arkivverket.Arkade.Core.Tests/TestData/Noark5/Version5_5/arkivuttrekk.xml b/src/Arkivverket.Arkade.Core.Tests/TestData/Noark5/Version5_5/arkivuttrekk.xml
index 44e34c3ca..92e9c22a4 100644
--- a/src/Arkivverket.Arkade.Core.Tests/TestData/Noark5/Version5_5/arkivuttrekk.xml
+++ b/src/Arkivverket.Arkade.Core.Tests/TestData/Noark5/Version5_5/arkivuttrekk.xml
@@ -67,7 +67,7 @@
                 <value>Noark 5</value>
                 <properties>
                   <property name="version">
-                    <value>5.5</value>
+                    <value>5.0</value>
                   </property>
                 </properties>
               </property>
diff --git a/src/Arkivverket.Arkade.Core.Tests/Testing/Noark5/TestUtil.cs b/src/Arkivverket.Arkade.Core.Tests/Testing/Noark5/TestUtil.cs
index 9eb8fd8ee..a332bcd8f 100644
--- a/src/Arkivverket.Arkade.Core.Tests/Testing/Noark5/TestUtil.cs
+++ b/src/Arkivverket.Arkade.Core.Tests/Testing/Noark5/TestUtil.cs
@@ -24,7 +24,7 @@ public static Archive CreateArchiveExtractionV5_5(string testdataDirectory)
             return new Base.ArchiveBuilder()
                 .WithArchiveType(ArchiveType.Noark5)
                 .WithWorkingDirectoryExternalContent(workingDirectory)
-                .WithArchiveDetails("5.5")
+                .WithArchiveDetails("5.0")
                 .Build();
         }
 
diff --git a/src/Arkivverket.Arkade.Core/Base/ArkadeTestNameProvider.cs b/src/Arkivverket.Arkade.Core/Base/ArkadeTestNameProvider.cs
index 163f62b98..75e8b862a 100644
--- a/src/Arkivverket.Arkade.Core/Base/ArkadeTestNameProvider.cs
+++ b/src/Arkivverket.Arkade.Core/Base/ArkadeTestNameProvider.cs
@@ -19,10 +19,7 @@ public static string GetDisplayName(TestId testId, SupportedLanguage language)
 
         private static string GetDisplayName(TestId testId, CultureInfo culture)
         {
-            string resourceDisplayNameKey = testId.ToString().Replace('.', '_');
-
-            if (testId.Version.Equals("5.5"))
-                resourceDisplayNameKey = $"{resourceDisplayNameKey}v5_5";
+            string resourceDisplayNameKey = $"{testId}{testId.Version}".Replace('.', '_');
 
             string testName = ArkadeTestDisplayNames.ResourceManager.GetString(resourceDisplayNameKey, culture);
 
diff --git a/src/Arkivverket.Arkade.Core/Resources/ArkadeTestDisplayNames.Designer.cs b/src/Arkivverket.Arkade.Core/Resources/ArkadeTestDisplayNames.Designer.cs
index 2b932d54f..70bc19567 100644
--- a/src/Arkivverket.Arkade.Core/Resources/ArkadeTestDisplayNames.Designer.cs
+++ b/src/Arkivverket.Arkade.Core/Resources/ArkadeTestDisplayNames.Designer.cs
@@ -648,9 +648,9 @@ public static string N5_35 {
         /// <summary>
         ///   Looks up a localized string similar to Number of parties.
         /// </summary>
-        public static string N5_35v5_5 {
+        public static string N5_35v5_0 {
             get {
-                return ResourceManager.GetString("N5_35v5_5", resourceCulture);
+                return ResourceManager.GetString("N5_35v5_0", resourceCulture);
             }
         }
         
diff --git a/src/Arkivverket.Arkade.Core/Resources/ArkadeTestDisplayNames.nb-NO.resx b/src/Arkivverket.Arkade.Core/Resources/ArkadeTestDisplayNames.nb-NO.resx
index a846bbbe9..0a4dcf668 100644
--- a/src/Arkivverket.Arkade.Core/Resources/ArkadeTestDisplayNames.nb-NO.resx
+++ b/src/Arkivverket.Arkade.Core/Resources/ArkadeTestDisplayNames.nb-NO.resx
@@ -312,7 +312,7 @@
   <data name="N5_35" xml:space="preserve">
     <value>Antall saksparter</value>
   </data>
-  <data name="N5_35v5_5" xml:space="preserve">
+  <data name="N5_35v5_0" xml:space="preserve">
     <value>Antall parter</value>
   </data>
   <data name="N5_36" xml:space="preserve">
diff --git a/src/Arkivverket.Arkade.Core/Resources/ArkadeTestDisplayNames.resx b/src/Arkivverket.Arkade.Core/Resources/ArkadeTestDisplayNames.resx
index 1a0f088e0..62dcd295e 100644
--- a/src/Arkivverket.Arkade.Core/Resources/ArkadeTestDisplayNames.resx
+++ b/src/Arkivverket.Arkade.Core/Resources/ArkadeTestDisplayNames.resx
@@ -313,7 +313,7 @@
   <data name="N5_35" xml:space="preserve">
     <value>Number of case parties</value>
   </data>
-  <data name="N5_35v5_5" xml:space="preserve">
+  <data name="N5_35v5_0" xml:space="preserve">
     <value>Number of parties</value>
   </data>
   <data name="N5_36" xml:space="preserve">
diff --git a/src/Arkivverket.Arkade.Core/Testing/Noark5/N5_35_NumberOfCaseParts.cs b/src/Arkivverket.Arkade.Core/Testing/Noark5/N5_35_NumberOfCaseParts.cs
index 90ca6d3ef..d6ee6d0dc 100644
--- a/src/Arkivverket.Arkade.Core/Testing/Noark5/N5_35_NumberOfCaseParts.cs
+++ b/src/Arkivverket.Arkade.Core/Testing/Noark5/N5_35_NumberOfCaseParts.cs
@@ -16,14 +16,7 @@ public class N5_35_NumberOfCaseParts : Noark5XmlReaderBaseTest
 
         private string GetTestVersion()
         {
-            string standardVersion = archive.Details.ArchiveStandard;
-
-            if (standardVersion.Equals("5.5"))
-            {
-                return "5.5";
-            }
-
-            return standardVersion;
+            return archive.Details.ArchiveStandard;
         }
 
         public N5_35_NumberOfCaseParts(Archive archive)
@@ -91,7 +84,7 @@ protected override void ReadElementValueEvent(object sender, ReadElementEventArg
 
         protected override void ReadEndElementEvent(object sender, ReadElementEventArgs eventArgs)
         {
-            if (archive.Details.ArchiveStandard.Equals("5.5"))
+            if (archive.Details.ArchiveStandard.Equals("5.0"))
             {
                 CountPartsForVersion5_5(eventArgs);
             }
diff --git a/src/Arkivverket.Arkade.Core/Util/TestId.cs b/src/Arkivverket.Arkade.Core/Util/TestId.cs
index 81061aef0..aa85afa1a 100644
--- a/src/Arkivverket.Arkade.Core/Util/TestId.cs
+++ b/src/Arkivverket.Arkade.Core/Util/TestId.cs
@@ -20,11 +20,11 @@ public class TestId : IComparable
                 { TestKind.Unidentified, "U" },
             };
 
-        public TestId(TestKind testKind, uint number, string version = "5.0")
+        public TestId(TestKind testKind, uint number, string version = default)
         {
             Kind = testKind;
             Number = number;
-            Version = version;
+            Version = $"v{version}";
         }
 
         public static TestId Create(string testId)