diff --git a/src/EFCore.Relational/Metadata/Internal/DbFunction.cs b/src/EFCore.Relational/Metadata/Internal/DbFunction.cs
index 74f557489ba..482db686a45 100644
--- a/src/EFCore.Relational/Metadata/Internal/DbFunction.cs
+++ b/src/EFCore.Relational/Metadata/Internal/DbFunction.cs
@@ -356,9 +356,7 @@ public virtual string? Schema
 
             _schema = schema;
 
-            _schemaConfigurationSource = schema == null
-                ? (ConfigurationSource?)null
-                : configurationSource.Max(_schemaConfigurationSource);
+            _schemaConfigurationSource = configurationSource.Max(_schemaConfigurationSource);
 
             return schema;
         }
@@ -398,9 +396,7 @@ public virtual string Name
 
             _name = name;
 
-            _nameConfigurationSource = name == null
-                ? (ConfigurationSource?)null
-                : configurationSource.Max(_nameConfigurationSource);
+            _nameConfigurationSource = configurationSource.Max(_nameConfigurationSource);
 
             return name;
         }
@@ -518,7 +514,7 @@ public virtual string? StoreType
             _storeType = storeType;
 
             _storeTypeConfigurationSource = storeType == null
-                ? (ConfigurationSource?)null
+                ? null
                 : configurationSource.Max(_storeTypeConfigurationSource);
 
             return storeType;
@@ -567,7 +563,7 @@ public virtual RelationalTypeMapping? TypeMapping
             _typeMapping = typeMapping;
 
             _typeMappingConfigurationSource = typeMapping == null
-                ? (ConfigurationSource?)null
+                ? null
                 : configurationSource.Max(_typeMappingConfigurationSource);
 
             return typeMapping;
@@ -615,7 +611,7 @@ public virtual Func<IReadOnlyList<SqlExpression>, SqlExpression>? Translation
             _translation = translation;
 
             _translationConfigurationSource = translation == null
-                ? (ConfigurationSource?)null
+                ? null
                 : configurationSource.Max(_translationConfigurationSource);
 
             return translation;
diff --git a/test/EFCore.Relational.Tests/Metadata/DbFunctionMetadataTests.cs b/test/EFCore.Relational.Tests/Metadata/DbFunctionMetadataTests.cs
index 7f548230123..47e26150e71 100644
--- a/test/EFCore.Relational.Tests/Metadata/DbFunctionMetadataTests.cs
+++ b/test/EFCore.Relational.Tests/Metadata/DbFunctionMetadataTests.cs
@@ -506,15 +506,21 @@ public void Adding_method_with_attribute_and_fluent_api_configuration_source()
             var modelBuilder = GetModelBuilder();
 
             var dbFuncBuilder = modelBuilder.HasDbFunction(MethodBmi)
-                .HasName("foo")
-                .HasSchema("bar");
+                .HasName(null)
+                .HasSchema(null);
 
             var dbFunc = dbFuncBuilder.Metadata;
 
+            Assert.Equal(MethodBmi.Name, dbFunc.Name);
+            Assert.Null(dbFunc.Schema);
+
+            dbFuncBuilder.HasName("foo");
+            dbFuncBuilder.HasSchema("BAR");
+
             modelBuilder.FinalizeModel();
 
             Assert.Equal("foo", dbFunc.Name);
-            Assert.Equal("bar", dbFunc.Schema);
+            Assert.Equal("BAR", dbFunc.Schema);
             Assert.Equal(typeof(int), dbFunc.MethodInfo.ReturnType);
         }
 
@@ -523,14 +529,21 @@ public void Adding_method_with_attribute_and_fluent_configuration_source()
         {
             var modelBuilder = GetModelBuilder();
 
-            modelBuilder.HasDbFunction(MethodBmi, funcBuilder => funcBuilder.HasName("foo").HasSchema("bar"));
+            modelBuilder.HasDbFunction(MethodBmi, funcBuilder => funcBuilder.HasName(null).HasSchema(null));
+
+            var dbFuncBuilder = modelBuilder.HasDbFunction(MethodBmi);
+            var dbFunc = dbFuncBuilder.Metadata;
+
+            Assert.Equal(MethodBmi.Name, dbFunc.Name);
+            Assert.Null(dbFunc.Schema);
 
-            var dbFunc = modelBuilder.HasDbFunction(MethodBmi).Metadata;
+            dbFuncBuilder.HasName("foo");
+            dbFuncBuilder.HasSchema("BAR");
 
             modelBuilder.FinalizeModel();
 
             Assert.Equal("foo", dbFunc.Name);
-            Assert.Equal("bar", dbFunc.Schema);
+            Assert.Equal("BAR", dbFunc.Schema);
             Assert.Equal(typeof(int), dbFunc.MethodInfo.ReturnType);
         }
 
@@ -869,11 +882,5 @@ public void DbFunction_Queryable_custom_translation()
 
         private TestHelpers.TestModelBuilder GetModelBuilder()
             => RelationalTestHelpers.Instance.CreateConventionBuilder();
-
-        private ProviderConventionSetBuilderDependencies CreateDependencies()
-            => RelationalTestHelpers.Instance.CreateContextServices().GetRequiredService<ProviderConventionSetBuilderDependencies>();
-
-        private RelationalConventionSetBuilderDependencies CreateRelationalDependencies()
-            => RelationalTestHelpers.Instance.CreateContextServices().GetRequiredService<RelationalConventionSetBuilderDependencies>();
     }
 }