diff --git a/test/Riok.Mapperly.IntegrationTests/Dto/TestObjectDto.cs b/test/Riok.Mapperly.IntegrationTests/Dto/TestObjectDto.cs
index c5d8408d32..ad4b5ee476 100644
--- a/test/Riok.Mapperly.IntegrationTests/Dto/TestObjectDto.cs
+++ b/test/Riok.Mapperly.IntegrationTests/Dto/TestObjectDto.cs
@@ -99,9 +99,9 @@ public TestObjectDto(int ctorValue, int unknownValue = 10, int ctorValue2 = 100)
         public IReadOnlySet<int> IReadOnlySet { get; set; } = new HashSet<int>();
 #endif
 
-        public HashSet<int> HashSet { get; set; } = [];
+        public HashSet<int> HashSet { get; set; } = new();
 
-        public SortedSet<int> SortedSet { get; set; } = [];
+        public SortedSet<int> SortedSet { get; set; } = new();
 
         public TestEnumDtoByValue EnumValue { get; set; }
 
@@ -131,7 +131,7 @@ public TestObjectDto(int ctorValue, int unknownValue = 10, int ctorValue2 = 100)
 
         public TimeOnly DateTimeValueTargetTimeOnly { get; set; }
 
-        public byte[] ToByteArrayWithInstanceMethod { get; set; } = [];
+        public byte[]? ToByteArrayWithInstanceMethod { get; set; }
 
         public int WithCreateMethod { get; set; }
 
diff --git a/test/Riok.Mapperly.IntegrationTests/_snapshots/MapperTest.SnapshotGeneratedSource_NET8_0.verified.cs b/test/Riok.Mapperly.IntegrationTests/_snapshots/MapperTest.SnapshotGeneratedSource_NET8_0.verified.cs
index 00634d6e33..804f7f7252 100644
--- a/test/Riok.Mapperly.IntegrationTests/_snapshots/MapperTest.SnapshotGeneratedSource_NET8_0.verified.cs
+++ b/test/Riok.Mapperly.IntegrationTests/_snapshots/MapperTest.SnapshotGeneratedSource_NET8_0.verified.cs
@@ -388,7 +388,10 @@ public partial byte[] ConvertWithInstanceMethod(global::System.Guid id)
             {
                 target.SubObject = null;
             }
-            target.ToByteArrayWithInstanceMethod = new global::System.Guid(dto.ToByteArrayWithInstanceMethod);
+            if (dto.ToByteArrayWithInstanceMethod != null)
+            {
+                target.ToByteArrayWithInstanceMethod = new global::System.Guid(dto.ToByteArrayWithInstanceMethod);
+            }
             target.WithCreateMethod = global::Riok.Mapperly.IntegrationTests.Models.ConvertWithStaticMethodObject.Create(dto.WithCreateMethod);
             target.WithCreateFromMethod = global::Riok.Mapperly.IntegrationTests.Models.ConvertWithStaticMethodObject.CreateFrom(dto.WithCreateFromMethod);
             target.WithFromSingleMethod = global::Riok.Mapperly.IntegrationTests.Models.ConvertWithStaticMethodObject.FromSingle(dto.WithFromSingleMethod);
diff --git a/test/Riok.Mapperly.IntegrationTests/_snapshots/StaticMapperTest.SnapshotGeneratedSource_NET6_0.verified.cs b/test/Riok.Mapperly.IntegrationTests/_snapshots/StaticMapperTest.SnapshotGeneratedSource_NET6_0.verified.cs
index f2d42e097f..c4d13f4b0e 100644
--- a/test/Riok.Mapperly.IntegrationTests/_snapshots/StaticMapperTest.SnapshotGeneratedSource_NET6_0.verified.cs
+++ b/test/Riok.Mapperly.IntegrationTests/_snapshots/StaticMapperTest.SnapshotGeneratedSource_NET6_0.verified.cs
@@ -562,7 +562,10 @@ public static partial void MapIdTargetFirst(global::Riok.Mapperly.IntegrationTes
             {
                 target.SubObject = null;
             }
-            target.ToByteArrayWithInstanceMethod = new global::System.Guid(dto.ToByteArrayWithInstanceMethod);
+            if (dto.ToByteArrayWithInstanceMethod != null)
+            {
+                target.ToByteArrayWithInstanceMethod = new global::System.Guid(dto.ToByteArrayWithInstanceMethod);
+            }
             target.WithCreateMethod = global::Riok.Mapperly.IntegrationTests.Models.ConvertWithStaticMethodObject.Create(dto.WithCreateMethod);
             target.WithCreateFromMethod = global::Riok.Mapperly.IntegrationTests.Models.ConvertWithStaticMethodObject.CreateFrom(dto.WithCreateFromMethod);
             target.WithFromSingleMethod = global::Riok.Mapperly.IntegrationTests.Models.ConvertWithStaticMethodObject.FromSingle(dto.WithFromSingleMethod);