diff --git a/README.md b/README.md
index d7664de..d08a8e9 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ To use, configure using the configuration helper method:
 var mapper = new Mapper(new MapperConfiguration(cfg => {
     cfg.AddExpressionMapping();
 	// Rest of your configuration
-}));
+}, loggerFactory));
 
 // or if using the MS Ext DI:
 
diff --git a/src/AutoMapper.Extensions.ExpressionMapping/AutoMapper.Extensions.ExpressionMapping.csproj b/src/AutoMapper.Extensions.ExpressionMapping/AutoMapper.Extensions.ExpressionMapping.csproj
index 72a9846..fe59df1 100644
--- a/src/AutoMapper.Extensions.ExpressionMapping/AutoMapper.Extensions.ExpressionMapping.csproj
+++ b/src/AutoMapper.Extensions.ExpressionMapping/AutoMapper.Extensions.ExpressionMapping.csproj
@@ -3,7 +3,7 @@
   <PropertyGroup>
     <Summary>Expression mapping (OData) extensions for AutoMapper</Summary>
     <Description>Expression mapping (OData) extensions for AutoMapper</Description>
-    <TargetFramework>net8.0</TargetFramework>
+		<TargetFramework>net8.0</TargetFramework>
     <GenerateDocumentationFile>true</GenerateDocumentationFile>
     <AssemblyOriginatorKeyFile>..\..\AutoMapper.snk</AssemblyOriginatorKeyFile>
     <SignAssembly>true</SignAssembly>
@@ -29,7 +29,7 @@
 	</ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="AutoMapper" Version="[14.0.0,15.0.0)" />
+    <PackageReference Include="AutoMapper" Version="[15.0.0,16.0.0)" />
     <PackageReference Include="MinVer" Version="6.0.0">
       <PrivateAssets>all</PrivateAssets>
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
diff --git a/src/AutoMapper.Extensions.ExpressionMapping/ConfigurationHelper.cs b/src/AutoMapper.Extensions.ExpressionMapping/ConfigurationHelper.cs
new file mode 100644
index 0000000..ab362fa
--- /dev/null
+++ b/src/AutoMapper.Extensions.ExpressionMapping/ConfigurationHelper.cs
@@ -0,0 +1,18 @@
+using Microsoft.Extensions.Logging.Abstractions;
+using System;
+
+namespace AutoMapper.Extensions.ExpressionMapping
+{
+    public static class ConfigurationHelper
+    {
+        public static MapperConfiguration GetMapperConfiguration(Action<IMapperConfigurationExpression> configure)
+        {
+            return new MapperConfiguration(configure, new NullLoggerFactory());
+        }
+
+        public static MapperConfiguration GetMapperConfiguration(MapperConfigurationExpression configurationExpression)
+        {
+            return new MapperConfiguration(configurationExpression, new NullLoggerFactory());
+        }
+    }
+}
diff --git a/src/AutoMapper.Extensions.ExpressionMapping/ExpressionMapper.cs b/src/AutoMapper.Extensions.ExpressionMapping/ExpressionMapper.cs
index 8f51b56..d90cba1 100644
--- a/src/AutoMapper.Extensions.ExpressionMapping/ExpressionMapper.cs
+++ b/src/AutoMapper.Extensions.ExpressionMapping/ExpressionMapper.cs
@@ -32,6 +32,11 @@ public Expression MapExpression(IGlobalConfiguration configurationProvider, Prof
                 Constant(configurationProvider)
             );
 
+        public TypePair? GetAssociatedTypes(TypePair initialTypes)
+        {
+            return null;
+        }
+
         internal class MappingVisitor : ExpressionVisitor
         {
             private IList<Type> _destSubTypes = new Type[0];
diff --git a/src/AutoMapper.Extensions.ExpressionMapping/XpressionMapperVisitor.cs b/src/AutoMapper.Extensions.ExpressionMapping/XpressionMapperVisitor.cs
index 15cafb7..c59e4e4 100644
--- a/src/AutoMapper.Extensions.ExpressionMapping/XpressionMapperVisitor.cs
+++ b/src/AutoMapper.Extensions.ExpressionMapping/XpressionMapperVisitor.cs
@@ -286,7 +286,7 @@ private void ConfigureAnonymousTypeMaps(Type oldType, Type newAnonymousType)
                     }
                 });
 
-            anonymousTypesConfigurationProvider = new MapperConfiguration(anonymousTypesBaseMappings);
+            anonymousTypesConfigurationProvider = ConfigurationHelper.GetMapperConfiguration(anonymousTypesBaseMappings);
         }
 
         private MemberInitExpression GetAnonymousTypeMemberInitExpression(Dictionary<string, Expression> bindingExpressions, Type oldType)
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapExpressionWithListConstants.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapExpressionWithListConstants.cs
index c1ab754..96f9c10 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapExpressionWithListConstants.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapExpressionWithListConstants.cs
@@ -12,7 +12,7 @@ public class CanMapExpressionWithListConstants
         public void Map_expression_with_constant_array()
         {
             //Arrange
-            var config = new MapperConfiguration
+            var config = ConfigurationHelper.GetMapperConfiguration
             (
                 cfg =>
                 {
@@ -43,7 +43,7 @@ public void Map_expression_with_constant_array()
         public void Map_expression_with_constant_list_using_generic_list_dot_contains()
         {
             //Arrange
-            var config = new MapperConfiguration
+            var config = ConfigurationHelper.GetMapperConfiguration
             (
                 cfg =>
                 {
@@ -73,7 +73,7 @@ public void Map_expression_with_constant_list_using_generic_list_dot_contains()
         public void Map_expression_with_constant_list_using_generic_enumerable_dot_contains()
         {
             //Arrange
-            var config = new MapperConfiguration
+            var config = ConfigurationHelper.GetMapperConfiguration
             (
                 cfg =>
                 {
@@ -103,7 +103,7 @@ public void Map_expression_with_constant_list_using_generic_enumerable_dot_conta
         public void Map_expression_with_constant_dictionary()
         {
             //Arrange
-            var config = new MapperConfiguration
+            var config = ConfigurationHelper.GetMapperConfiguration
             (
                 cfg =>
                 {
@@ -133,7 +133,7 @@ public void Map_expression_with_constant_dictionary()
         public void Map_expression_with_constant_dictionary_mapping_both_Key_and_value()
         {
             //Arrange
-            var config = new MapperConfiguration
+            var config = ConfigurationHelper.GetMapperConfiguration
             (
                 cfg =>
                 {
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapExpressionWithLocalExpressionConstant.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapExpressionWithLocalExpressionConstant.cs
index d83f867..1451df4 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapExpressionWithLocalExpressionConstant.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapExpressionWithLocalExpressionConstant.cs
@@ -12,7 +12,7 @@ public class CanMapExpressionWithLocalExpressionConstant
         public void Map_expression_wchich_includes_local_constant()
         {
             //Arrange
-            var config = new MapperConfiguration
+            var config = ConfigurationHelper.GetMapperConfiguration
             (
                 cfg =>
                 {
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapMemberFromTypeBinaryExpression.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapMemberFromTypeBinaryExpression.cs
index 68c1877..bd42d44 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapMemberFromTypeBinaryExpression.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapMemberFromTypeBinaryExpression.cs
@@ -12,7 +12,7 @@ public class CanMapMemberFromTypeBinaryExpression
         public void Can_map_using_type_binary_expression_to_test_the_parameter_expression()
         {
             //arrange
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
 
@@ -41,7 +41,7 @@ public void Can_map_using_type_binary_expression_to_test_the_parameter_expressio
         public void Can_map_using_type_binary_expression_to_test_a_member_expression()
         {
             //arrange
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
 
@@ -77,7 +77,7 @@ public void Can_map_using_type_binary_expression_to_test_a_member_expression()
         public void Can_map_using_instance_method_call_to_test_the_parameter_expression()
         {
             //arrange
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
 
@@ -101,7 +101,7 @@ public void Can_map_using_instance_method_call_to_test_the_parameter_expression(
         public void Can_map_using_static_method_call_to_test_the_parameter_expression()
         {
             //arrange
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
 
@@ -129,7 +129,7 @@ public void Can_map_using_static_method_call_to_test_the_parameter_expression()
         public void Can_map_using_static_generic_method_call_to_test_the_parameter_expression()
         {
             //arrange
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
 
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapMismatchedLiteralMemberExpressionsWithoutCustomExpressions.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapMismatchedLiteralMemberExpressionsWithoutCustomExpressions.cs
index cfd5472..ecf7bbf 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapMismatchedLiteralMemberExpressionsWithoutCustomExpressions.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapMismatchedLiteralMemberExpressionsWithoutCustomExpressions.cs
@@ -198,7 +198,7 @@ public void CanMapNullableSelectorToNonNullableelectorWithoutCustomExpression(st
 
         private static IMapper GetModelToDataMapper()
         {
-            var config = new MapperConfiguration(c =>
+            var config = ConfigurationHelper.GetMapperConfiguration(c =>
             {
                 c.CreateMap<ProductModel, Product>();
             });
@@ -208,7 +208,7 @@ private static IMapper GetModelToDataMapper()
 
         private static IMapper GetDataToModelMapper()
         {
-            var config = new MapperConfiguration(c =>
+            var config = ConfigurationHelper.GetMapperConfiguration(c =>
             {
                 c.CreateMap<Product, ProductModel>();
             });
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapParameterBodyFromChildReferenceWithoutMemberExpression.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapParameterBodyFromChildReferenceWithoutMemberExpression.cs
index 0c26713..5848f28 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapParameterBodyFromChildReferenceWithoutMemberExpression.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapParameterBodyFromChildReferenceWithoutMemberExpression.cs
@@ -12,7 +12,7 @@ public class CanMapParameterBodyFromChildReferenceWithoutMemberExpression
         public void Can_map_parameter_body_from_child_reference_without_member_expression()
         {
             // Arrange
-            var config = new MapperConfiguration(c =>
+            var config = ConfigurationHelper.GetMapperConfiguration(c =>
             {
                 c.CreateMap<TestCategory, TestProductDTO>()
                    .ForMember(p => p.Brand, c => c.MapFrom(p => EF.Property<int>(p, "BrandId"))); ;
@@ -42,7 +42,7 @@ public class TestCategory
         }
         public class TestProduct
         {
-            public TestCategory? Category { get; set; }
+            public TestCategory Category { get; set; }
         }
 
         public class TestProductDTO
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapParameterBodyWithoutMemberExpression.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapParameterBodyWithoutMemberExpression.cs
index f0e8db3..c4676a0 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapParameterBodyWithoutMemberExpression.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/CanMapParameterBodyWithoutMemberExpression.cs
@@ -12,7 +12,7 @@ public class CanMapParameterBodyWithoutMemberExpression
         public void Can_map_parameter_body_without_member_expression()
         {
             // Arrange
-            var config = new MapperConfiguration(c =>
+            var config = ConfigurationHelper.GetMapperConfiguration(c =>
             {
                 c.CreateMap<TestProduct, TestProductDTO>()
                   .ForMember(p => p.Brand, c => c.MapFrom(p => EF.Property<int>(p, "BrandId")));
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/EnumerableDotContainsWorksOnLocalVariables.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/EnumerableDotContainsWorksOnLocalVariables.cs
index 8fec94b..723c141 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/EnumerableDotContainsWorksOnLocalVariables.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/EnumerableDotContainsWorksOnLocalVariables.cs
@@ -12,7 +12,7 @@ public class EnumerableDotContainsWorksOnLocalVariables
         [Fact]
         public void Issue87()
         {
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
 
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExplicitExpansionAsDataSource.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExplicitExpansionAsDataSource.cs
index 0690279..224d0c2 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExplicitExpansionAsDataSource.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExplicitExpansionAsDataSource.cs
@@ -44,7 +44,7 @@ public class GrandChildDest
             
         }
 
-        protected override MapperConfiguration Configuration { get; } = new MapperConfiguration(cfg =>
+        protected override MapperConfiguration Configuration { get; } = ConfigurationHelper.GetMapperConfiguration(cfg =>
         {
 
             cfg.CreateMap<Source, Dest>()
@@ -145,7 +145,7 @@ public class GrandChildDest
 
         }
 
-        protected override MapperConfiguration Configuration { get; } = new MapperConfiguration(cfg =>
+        protected override MapperConfiguration Configuration { get; } = ConfigurationHelper.GetMapperConfiguration(cfg =>
         {
             cfg.CreateMap<Source, Dest>()
                 .ForMember(m => m.Child1, opt => opt.ExplicitExpansion())
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionConversion.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionConversion.cs
index 15c9814..aa0a9b7 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionConversion.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionConversion.cs
@@ -53,7 +53,7 @@ public class DestWithEnum : Dest
         [Fact]
         public void Can_map_unary_expression_converting_enum_to_int()
         {
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
                 cfg.CreateMap<SourceEnum, DestEnum>();
@@ -77,7 +77,7 @@ public void Can_map_unary_expression_converting_enum_to_int()
         [Fact]
         public void Can_map_single_properties()
         {
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
                 cfg.CreateMap<Source, Dest>();
@@ -100,7 +100,7 @@ public void Can_map_single_properties()
         [Fact]
         public void Can_map_flattened_properties()
         {
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
                 cfg.CreateMap<Source, Dest>();
@@ -123,7 +123,7 @@ public void Can_map_flattened_properties()
         [Fact]
         public void Can_map_custom_mapped_properties()
         {
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
                 cfg.CreateMap<Source, Dest>().ForMember(d => d.Bar, opt => opt.MapFrom(src => src.Foo));
@@ -146,7 +146,7 @@ public void Can_map_custom_mapped_properties()
         [Fact]
         public void Throw_AutoMapperMappingException_if_expression_types_dont_match()
         {
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
                 cfg.CreateMap<Source, Dest>();
@@ -160,7 +160,7 @@ public void Throw_AutoMapperMappingException_if_expression_types_dont_match()
         [Fact]
         public void Can_map_with_different_destination_types()
         {
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
                 cfg.CreateMap<Source, Dest>().ForMember(d => d.Bar, opt => opt.MapFrom(src => src.Foo));
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMapping.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMapping.cs
index 8fd3643..6638c39 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMapping.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMapping.cs
@@ -23,7 +23,7 @@ public class DestExpressionHolder
             public Expression<Func<ExpressionMapping.Parent, bool>> Expression { get; set; }
         }
 
-        protected override MapperConfiguration Configuration { get; } = new MapperConfiguration(cfg =>
+        protected override MapperConfiguration Configuration { get; } = ConfigurationHelper.GetMapperConfiguration(cfg =>
         {
             cfg.AddExpressionMapping();
             cfg.CreateMap<SourceExpressionHolder, DestExpressionHolder>().ReverseMap();
@@ -109,7 +109,7 @@ public Parent Parent
         private Expression<Func<ParentDTO, bool>> _predicateExpression;
         private Parent _valid;
 
-        protected override MapperConfiguration Configuration { get; } = new MapperConfiguration(cfg =>
+        protected override MapperConfiguration Configuration { get; } = ConfigurationHelper.GetMapperConfiguration(cfg =>
         {
             cfg.AddExpressionMapping();
             cfg.CreateMap<GrandParent, GrandParentDTO>().ReverseMap();
@@ -319,7 +319,7 @@ public class TestModel
             public string Code { get; set; }
         }
 
-        protected override MapperConfiguration Configuration { get; } = new MapperConfiguration(config => config.CreateMap<TestModel, TestData>());
+        protected override MapperConfiguration Configuration { get; } = ConfigurationHelper.GetMapperConfiguration(config => config.CreateMap<TestModel, TestData>());
 
         public void Should_map_with_closures()
         {
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMappingEnumToNumericOrString.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMappingEnumToNumericOrString.cs
index bda7b52..75d841a 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMappingEnumToNumericOrString.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMappingEnumToNumericOrString.cs
@@ -69,7 +69,7 @@ protected override MapperConfiguration Configuration
         {
             get
             {
-                return new MapperConfiguration(config =>
+                return ConfigurationHelper.GetMapperConfiguration(config =>
                 {
                     config.AddExpressionMapping();
                     config.CreateMap<Entity<byte>, EntityDto<SimpleEnumByte>>()
@@ -169,7 +169,6 @@ protected override MapperConfiguration Configuration
         [InlineData(SimpleEnumUInt.Value3, 1U)]
         [InlineData(SimpleEnumLong.Value3, 1L)]
         [InlineData(SimpleEnumULong.Value3, 1UL)]
-        [InlineData(SimpleEnumSByte.Value3, (sbyte)3)]
         [InlineData(SimpleEnumByte.Value3, (byte)3)]
         [InlineData(SimpleEnumShort.Value3, (short)3)]
         [InlineData(SimpleEnumUShort.Value3, (ushort)3)]
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMappingPropertyFromBaseClass.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMappingPropertyFromBaseClass.cs
index 4ccbac5..1c471e3 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMappingPropertyFromBaseClass.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMappingPropertyFromBaseClass.cs
@@ -39,7 +39,7 @@ protected override MapperConfiguration Configuration
         {
             get
             {
-                var config = new MapperConfiguration(cfg =>
+                var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
                 {
                     cfg.AddExpressionMapping();
                     // issue #1886
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMappingPropertyFromDerviedType.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMappingPropertyFromDerviedType.cs
index e26c978..1833f21 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMappingPropertyFromDerviedType.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMappingPropertyFromDerviedType.cs
@@ -17,7 +17,7 @@ protected override MapperConfiguration Configuration
         {
             get
             {
-                var config = new MapperConfiguration(cfg =>
+                var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
                 {
                     cfg.AddExpressionMapping();
                     cfg.AddProfile(typeof(DerivedTypeProfile));
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMappingWithUseAsDataSource.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMappingWithUseAsDataSource.cs
index 8bbc8da..13e59d4 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMappingWithUseAsDataSource.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ExpressionMappingWithUseAsDataSource.cs
@@ -73,7 +73,7 @@ public void Should_Map_From_Generic_Type()
 
         private static IMapper CreateMapper()
         {
-            var mapperConfig = new MapperConfiguration(cfg =>
+            var mapperConfig = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.CreateMap<Model, DTO>()
                     .ForMember(d => d.Nested, opt => opt.MapFrom(s => s));
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/Impl/SourceInjectedQuery.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/Impl/SourceInjectedQuery.cs
index 01bb42b..b3739e2 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/Impl/SourceInjectedQuery.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/Impl/SourceInjectedQuery.cs
@@ -35,7 +35,7 @@ public class Destination
             public string[] Strings { get; set; }
         }
 
-        protected override MapperConfiguration Configuration { get; } = new MapperConfiguration(cfg =>
+        protected override MapperConfiguration Configuration { get; } = ConfigurationHelper.GetMapperConfiguration(cfg =>
         {
             cfg.CreateMap<Destination, Source>()
                 .ForMember(s => s.SrcValue, opt => opt.MapFrom(d => d.DestValue))
@@ -480,7 +480,7 @@ public void SupportsParmeterization()
             int value = 0;
 
             Expression<Func<SourceWithParams, int>> sourceMember = src => value + 5;
-            var config = new MapperConfiguration(cfg => cfg.CreateMap<SourceWithParams, DestWithParams>()
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg => cfg.CreateMap<SourceWithParams, DestWithParams>()
                 .ForMember(dest => dest.Value, opt => opt.MapFrom(sourceMember)));
             var mapper = new Mapper(config);
 
@@ -505,7 +505,7 @@ public void SupportsParmeterization_DoesNotCacheParameter()
             int value = 0;
 
             Expression<Func<SourceWithParams, int>> sourceMember = src => value + 5;
-            var config = new MapperConfiguration(cfg => cfg.CreateMap<SourceWithParams, DestWithParams>()
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg => cfg.CreateMap<SourceWithParams, DestWithParams>()
                 .ForMember(dest => dest.Value, opt => opt.MapFrom(sourceMember)));
             var mapper = new Mapper(config);
 
@@ -560,7 +560,7 @@ public void SupportsParameterizationInQuery()
             // so that we can declare a parameter (userId) that is independent of mapping and query definition.
             // that way, in the query, we have a parameter which needs to be replaced.
             // (in SourceInjectedQueryProvider.ConvertDestinationExpressionToSourceExpression)
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 // parameter defined in mapping part
                 long userId = default(long);
@@ -611,7 +611,7 @@ public void Shoud_convert_type_changes()
         //[Fact(Skip="Conventions not available like this.")]
         //public void Shoud_work_with_conventions()
         //{
-        //    //var mapper = new MapperConfiguration(cfg => cfg.AddConditionalObjectMapper()
+        //    //var mapper = ConfigurationHelper.GetMapperConfiguration(cfg => cfg.AddConditionalObjectMapper()
         //    //    .Where((s, d) => s.Name == d.Name + "Model" || s.Name + "Model" == d.Name)).CreateMapper();
 
 
@@ -642,7 +642,7 @@ public void Should_dispose_enumerator_when_arbitrary_projection_is_enumerated()
 
         private static IMapper SetupAutoMapper()
         {
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.CreateMap<User, UserModel>()
                 .ForMember(d => d.Id, opt => opt.MapFrom(s => s.UserId))
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/MappingMemberInitWithCustomExpressions.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/MappingMemberInitWithCustomExpressions.cs
index 28ca63b..5792f5e 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/MappingMemberInitWithCustomExpressions.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/MappingMemberInitWithCustomExpressions.cs
@@ -45,7 +45,7 @@ public void Map_member_init_using_custom_expressions()
         }
 
         MapperConfiguration GetConfiguration()
-            => new
+            => ConfigurationHelper.GetMapperConfiguration
             (
                 cfg =>
                 {
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/MappingMemberInitWithPropertiesInBaseClass.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/MappingMemberInitWithPropertiesInBaseClass.cs
index 0d768f2..2001408 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/MappingMemberInitWithPropertiesInBaseClass.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/MappingMemberInitWithPropertiesInBaseClass.cs
@@ -175,7 +175,7 @@ public void Map_member_init_without_include_members_and_including_nested_members
         }
 
         MapperConfiguration GetConfigurationWiithoutIncludeMembers()
-            => new MapperConfiguration(cfg =>
+            => ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
 
@@ -191,7 +191,7 @@ MapperConfiguration GetConfigurationWiithoutIncludeMembers()
             });
 
         MapperConfiguration GetConfigurationWiithIncludeMembers()
-            => new MapperConfiguration(cfg =>
+            => ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
 
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/MappingWithIncludeMembersConfigurations.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/MappingWithIncludeMembersConfigurations.cs
index 79f825e..4e126be 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/MappingWithIncludeMembersConfigurations.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/MappingWithIncludeMembersConfigurations.cs
@@ -175,7 +175,7 @@ public void Map_member_init_without_include_members_and_including_nested_members
         }
 
         MapperConfiguration GetConfigurationWiithoutIncludeMembers() 
-            => new MapperConfiguration(cfg =>
+            => ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
 
@@ -191,7 +191,7 @@ MapperConfiguration GetConfigurationWiithoutIncludeMembers()
             });
 
         MapperConfiguration GetConfigurationWiithIncludeMembers()
-            => new MapperConfiguration(cfg =>
+            => ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
 
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/MemberMappingsOfLiteralParentTypesMustMatch.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/MemberMappingsOfLiteralParentTypesMustMatch.cs
index 27b7a4d..a652514 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/MemberMappingsOfLiteralParentTypesMustMatch.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/MemberMappingsOfLiteralParentTypesMustMatch.cs
@@ -79,7 +79,7 @@ public void MappingMemberOfNonNullableParentToMemberOfNullableParentWorksUsingCu
 
         private static IMapper GetMapper()
         {
-            var config = new MapperConfiguration(c =>
+            var config = ConfigurationHelper.GetMapperConfiguration(c =>
             {
                 c.CreateMap<Product, ProductModel>();
             });
@@ -89,7 +89,7 @@ private static IMapper GetMapper()
 
         private static IMapper GetMapperWithCustomExpressions()
         {
-            var config = new MapperConfiguration(c =>
+            var config = ConfigurationHelper.GetMapperConfiguration(c =>
             {
                 c.CreateMap<Product, ProductModel>()
                     .ForMember(d => d.DateTime, o => o.MapFrom(s => s.DateTime.Value))
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ParameterizedQueriesTestsAsDataSource.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ParameterizedQueriesTestsAsDataSource.cs
index aee8eb0..97c8a7d 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ParameterizedQueriesTestsAsDataSource.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ParameterizedQueriesTestsAsDataSource.cs
@@ -21,7 +21,7 @@ public class Dest
             public int Value { get; set; }
         }
 
-        protected override MapperConfiguration Configuration { get; } = new MapperConfiguration(cfg =>
+        protected override MapperConfiguration Configuration { get; } = ConfigurationHelper.GetMapperConfiguration(cfg =>
         {
             int value = 0;
 
@@ -69,7 +69,7 @@ public class Dest
             public int Value { get; set; }
         }
 
-        protected override MapperConfiguration Configuration { get; } = new MapperConfiguration(cfg =>
+        protected override MapperConfiguration Configuration { get; } = ConfigurationHelper.GetMapperConfiguration(cfg =>
         {
             int value = 0;
 
@@ -134,7 +134,7 @@ public DB()
             public IQueryable<User> Users { get; }
         }
 
-        protected override MapperConfiguration Configuration { get; } = new MapperConfiguration(cfg =>
+        protected override MapperConfiguration Configuration { get; } = ConfigurationHelper.GetMapperConfiguration(cfg =>
         {
             DB db = null;
 
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ShouldOnlyMapExistingTypeMaps.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ShouldOnlyMapExistingTypeMaps.cs
index 04dcebb..3cb00a0 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ShouldOnlyMapExistingTypeMaps.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ShouldOnlyMapExistingTypeMaps.cs
@@ -11,7 +11,7 @@ public class ShouldOnlyMapExistingTypeMaps
         [Fact]
         public void Issue85()
         {
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
 
@@ -37,7 +37,7 @@ public void Issue85()
         [Fact]
         public void Issue93()
         {
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
 
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ShouldUseDeclaringTypeForInstanceMethodCalls.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ShouldUseDeclaringTypeForInstanceMethodCalls.cs
index 6d6ecaf..6db6f2c 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ShouldUseDeclaringTypeForInstanceMethodCalls.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/ShouldUseDeclaringTypeForInstanceMethodCalls.cs
@@ -12,7 +12,7 @@ public class ShouldUseDeclaringTypeForInstanceMethodCalls
         public void MethodInfoShouldRetainDeclaringTypeInMappedExpression()
         {
             //Arrange
-            var config = new MapperConfiguration
+            var config = ConfigurationHelper.GetMapperConfiguration
             (
                 cfg =>
                 {
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/XpressionMapper.ForPath.Tests.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/XpressionMapper.ForPath.Tests.cs
index 98b186c..c0050e0 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/XpressionMapper.ForPath.Tests.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/XpressionMapper.ForPath.Tests.cs
@@ -150,7 +150,7 @@ private void SetupQueryableCollection()
 
         private void SetupAutoMapper()
         {
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
                 cfg.AddMaps(typeof(ForPathCustomerProfile));
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/XpressionMapper.Structs.Tests.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/XpressionMapper.Structs.Tests.cs
index 5196188..0ca9286 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/XpressionMapper.Structs.Tests.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/XpressionMapper.Structs.Tests.cs
@@ -14,7 +14,7 @@ public class XpressionMapperStructsTests
         public void Can_map_value_types_constants_with_instance_methods()
         {
             // Arrange
-            var config = new MapperConfiguration(c =>
+            var config = ConfigurationHelper.GetMapperConfiguration(c =>
             {
                 c.CreateMap<GarageModel, Garage>()
                     .ReverseMap()
@@ -44,7 +44,7 @@ public void Can_map_value_types_constants_with_instance_methods()
         public void Can_convert_return_type()
         {
             // Arrange
-            var config = new MapperConfiguration(c =>
+            var config = ConfigurationHelper.GetMapperConfiguration(c =>
             {
                 c.CreateMap<GarageModel, Garage>()
                     .ReverseMap()
@@ -74,7 +74,7 @@ public void Can_convert_return_type()
         public void Replace_operator_when_operands_change()
         {
             // Arrange
-            var config = new MapperConfiguration(cfg => {
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg => {
                 cfg.AddExpressionMapping();
                 cfg.CreateMap<Source, Dest>().ReverseMap();
             });
@@ -94,7 +94,7 @@ public void Replace_operator_when_operands_change()
         public void Can_map_local_variable_in_filter()
         {
             // Arrange
-            var config = new MapperConfiguration(c =>
+            var config = ConfigurationHelper.GetMapperConfiguration(c =>
             {
                 c.CreateMap<GarageModel, Garage>()
                     .ReverseMap()
@@ -119,7 +119,7 @@ public void Can_map_local_variable_in_filter()
         public void Can_map_child_property_of_local_variable_in_filter()
         {
             // Arrange
-            var config = new MapperConfiguration(c =>
+            var config = ConfigurationHelper.GetMapperConfiguration(c =>
             {
                 c.CreateMap<GarageModel, Garage>()
                     .ReverseMap()
@@ -144,7 +144,7 @@ public void Can_map_child_property_of_local_variable_in_filter()
         public void Can_map_listeral_child_property_of_local_variable_in_filter()
         {
             // Arrange
-            var config = new MapperConfiguration(c =>
+            var config = ConfigurationHelper.GetMapperConfiguration(c =>
             {
                 c.CreateMap<GarageModel, Garage>()
                     .ReverseMap()
@@ -170,7 +170,7 @@ public void Can_map_listeral_child_property_of_local_variable_in_filter()
         public void Ignore_member_expressions_where_type_is_literal_and_node_type_is_constant()
         {
             // Arrange
-            var config = new MapperConfiguration(c =>
+            var config = ConfigurationHelper.GetMapperConfiguration(c =>
             {
                 c.CreateMap<GarageModel, Garage>()
                     .ReverseMap()
@@ -197,7 +197,7 @@ public void Ignore_member_expressions_where_type_is_literal_and_node_type_is_con
         public void Can_map_local_variable_literal_in_filter()
         {
             // Arrange
-            var config = new MapperConfiguration(c =>
+            var config = ConfigurationHelper.GetMapperConfiguration(c =>
             {
                 c.CreateMap<ItemWithDateLiteral, ItemWithDateLiteralDto>()
                 .ForMember(dest => dest.CreateDate, opts => opts.MapFrom(x => x.Date));
@@ -223,7 +223,7 @@ public void Can_map_local_variable_literal_in_filter()
         public void Can_map_local_variable_nullable_in_filter()
         {
             // Arrange
-            var config = new MapperConfiguration(c =>
+            var config = ConfigurationHelper.GetMapperConfiguration(c =>
             {
                 c.CreateMap<ItemWithDateLiteral, ItemWithDateLiteralDto>()
                 .ForMember(dest => dest.CreateDate, opts => opts.MapFrom(x => x.Date));
diff --git a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/XpressionMapperTests.cs b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/XpressionMapperTests.cs
index 244d0f8..2195d56 100644
--- a/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/XpressionMapperTests.cs
+++ b/tests/AutoMapper.Extensions.ExpressionMapping.UnitTests/XpressionMapperTests.cs
@@ -327,7 +327,7 @@ public void Map_object_when_null_values_are_typed()
         public void Map_expression_should_throws_exception_when_mapping_is_missed()
         {
             // Arrange
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
                 cfg.CreateMap<Car, CarModel>();
@@ -352,7 +352,7 @@ public void Map_expression_should_throws_exception_when_mapping_is_missed()
         public void Map_expression_should_throws_exception_when_mapping_for_property_is_missed()
         {
             // Arrange    
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
                 cfg.CreateMap<ThingModel, Thing>();
@@ -1041,7 +1041,7 @@ public void Can_map_expression_with_multiple_destination_parameters_of_the_same_
 
         private static void SetupAutoMapper()
         {
-            var config = new MapperConfiguration(cfg =>
+            var config = ConfigurationHelper.GetMapperConfiguration(cfg =>
             {
                 cfg.AddExpressionMapping();
                 cfg.AddMaps(typeof(OrganizationProfile));