diff --git a/.github/workflows/dotnetcore.yml b/.github/workflows/dotnetcore.yml
index fd30924..d1f5722 100644
--- a/.github/workflows/dotnetcore.yml
+++ b/.github/workflows/dotnetcore.yml
@@ -12,7 +12,7 @@ jobs:
     - name: Setup .NET Core
       uses: actions/setup-dotnet@v1
       with:
-        dotnet-version: 6.0.x
+        dotnet-version: 8.0.x
         include-prerelease: true
     - name: Build with dotnet
       run: dotnet build "./src/SimplerSoftware.EntityFrameworkCore.SqlServer.NodaTime.sln" --configuration Release
diff --git a/src/SimplerSoftware.EntityFrameworkCore.SqlServer.NodaTime/Storage/SqlServerNodaTimeTypeMappingSourcePlugin.cs b/src/SimplerSoftware.EntityFrameworkCore.SqlServer.NodaTime/Storage/SqlServerNodaTimeTypeMappingSourcePlugin.cs
index a062b5c..4759045 100644
--- a/src/SimplerSoftware.EntityFrameworkCore.SqlServer.NodaTime/Storage/SqlServerNodaTimeTypeMappingSourcePlugin.cs
+++ b/src/SimplerSoftware.EntityFrameworkCore.SqlServer.NodaTime/Storage/SqlServerNodaTimeTypeMappingSourcePlugin.cs
@@ -50,7 +50,7 @@ public SqlServerNodaTimeTypeMappingSourcePlugin()
             this.AddTypeMappingToDictionaries(this._durationTypeMapping);
         }
 
-        public virtual RelationalTypeMapping FindMapping(in RelationalTypeMappingInfo mappingInfo)
+        public RelationalTypeMapping FindMapping(in RelationalTypeMappingInfo mappingInfo)
         {
             var clrType = mappingInfo.ClrType;
             var storeTypeName = mappingInfo.StoreTypeName;
@@ -88,7 +88,7 @@ public virtual RelationalTypeMapping FindMapping(in RelationalTypeMappingInfo ma
 
             // TODO: Cache size/precision/scale mappings?
             return mappingInfo.Precision.HasValue && _hasPrecisionTypes.Contains(mapping.ClrType)
-                ? mapping.Clone(mappingInfo, null)
+                ? mapping.Clone(mappingInfo)
                 : mapping;
         }