diff --git a/test/Riok.Mapperly.IntegrationTests/BaseMapperTest.cs b/test/Riok.Mapperly.IntegrationTests/BaseMapperTest.cs
index 0eaa946613..8e547c30f3 100644
--- a/test/Riok.Mapperly.IntegrationTests/BaseMapperTest.cs
+++ b/test/Riok.Mapperly.IntegrationTests/BaseMapperTest.cs
@@ -109,6 +109,7 @@ public static TestObject NewTestObj()
                 ExistingISet = { "1", "2", "3", },
                 ExistingHashSet = { "1", "2", "3", },
                 ExistingSortedSet = { "1", "2", "3", },
+                ExistingList = { "1", "2", "3", },
                 ISet = new HashSet<string> { "1", "2", "3", },
 #if NET5_0_OR_GREATER
                 IReadOnlySet = new HashSet<string> { "1", "2", "3", },
diff --git a/test/Riok.Mapperly.IntegrationTests/Dto/TestObjectDto.cs b/test/Riok.Mapperly.IntegrationTests/Dto/TestObjectDto.cs
index 2e0c554ea2..ea814ea60f 100644
--- a/test/Riok.Mapperly.IntegrationTests/Dto/TestObjectDto.cs
+++ b/test/Riok.Mapperly.IntegrationTests/Dto/TestObjectDto.cs
@@ -79,9 +79,11 @@ public TestObjectDto(int ctorValue, int unknownValue = 10, int ctorValue2 = 100)
 
         public ISet<int> ExistingISet { get; } = new HashSet<int>();
 
-        public HashSet<int> ExistingHashSet { get; } = new HashSet<int>();
+        public HashSet<int> ExistingHashSet { get; } = new();
 
-        public SortedSet<int> ExistingSortedSet { get; } = new SortedSet<int>();
+        public SortedSet<int> ExistingSortedSet { get; } = new();
+
+        public List<int> ExistingList { get; } = new();
 
         public ISet<int> ISet { get; set; } = new HashSet<int>();
 
diff --git a/test/Riok.Mapperly.IntegrationTests/Mapper/StaticTestMapper.cs b/test/Riok.Mapperly.IntegrationTests/Mapper/StaticTestMapper.cs
index 84c41bbf12..ffe5161dd3 100644
--- a/test/Riok.Mapperly.IntegrationTests/Mapper/StaticTestMapper.cs
+++ b/test/Riok.Mapperly.IntegrationTests/Mapper/StaticTestMapper.cs
@@ -38,6 +38,15 @@ public static TestObjectDto MapToDto(TestObject src)
             return target;
         }
 
+        public static void MapExistingList(List<string> src, List<int> dst)
+        {
+            dst.EnsureCapacity(src.Count + dst.Count);
+            foreach (var item in src)
+            {
+                dst.Add(int.Parse(item));
+            }
+        }
+
         // disable obsolete warning, as the obsolete attribute should still be tested.
 #pragma warning disable CS0618
         [MapperIgnore(nameof(TestObjectDto.IgnoredStringValue))]
diff --git a/test/Riok.Mapperly.IntegrationTests/Models/TestObject.cs b/test/Riok.Mapperly.IntegrationTests/Models/TestObject.cs
index c01df23838..86605edc40 100644
--- a/test/Riok.Mapperly.IntegrationTests/Models/TestObject.cs
+++ b/test/Riok.Mapperly.IntegrationTests/Models/TestObject.cs
@@ -77,9 +77,11 @@ public TestObject(int ctorValue, int unknownValue = 10, int ctorValue2 = 100)
 
         public ISet<string> ExistingISet { get; } = new HashSet<string>();
 
-        public HashSet<string> ExistingHashSet { get; } = new HashSet<string>();
+        public HashSet<string> ExistingHashSet { get; } = new();
 
-        public SortedSet<string> ExistingSortedSet { get; } = new SortedSet<string>();
+        public SortedSet<string> ExistingSortedSet { get; } = new();
+
+        public List<string> ExistingList { get; } = new();
 
         public ISet<string> ISet { get; set; } = new HashSet<string>();