diff --git a/test/ExtendedXmlSerializer.Tests.ReportedIssues/Issue423Tests.cs b/test/ExtendedXmlSerializer.Tests.ReportedIssues/Issue423Tests.cs
new file mode 100644
index 000000000..c2e897b21
--- /dev/null
+++ b/test/ExtendedXmlSerializer.Tests.ReportedIssues/Issue423Tests.cs
@@ -0,0 +1,49 @@
+using ExtendedXmlSerializer.Configuration;
+using ExtendedXmlSerializer.Tests.ReportedIssues.Support;
+using FluentAssertions;
+using JetBrains.Annotations;
+using System.Collections.Generic;
+using System.Linq;
+using Xunit;
+
+namespace ExtendedXmlSerializer.Tests.ReportedIssues
+{
+	public sealed class Issue423Tests
+	{
+		[Fact]
+		public void Verify()
+		{
+			var serializer = new ConfigurationContainer().UseOptimizedNamespaces().Create().ForTesting();
+			var first = new Subject
+			{
+				Message = "Hello World!",
+				Dictionaries =
+				{
+					new Dictionary<int, string> {[123] = "Hello", [456] = "World"},
+					new Dictionary<int, string> {[678] = "Hello", [910] = "World"}
+				}
+			};
+			var second = new Subject
+			{
+				Message = "Hello again!",
+				Dictionaries =
+				{
+					new Dictionary<int, string> {[1112] = "Hello", [1314] = "Again"},
+					new Dictionary<int, string> {[1516] = "Hello", [1718] = "Again"}
+				}
+			};
+			var instance = new[] {first, second}.ToList();
+
+			serializer.Cycle(instance).Should().BeEquivalentTo(instance);
+		}
+
+		sealed class Subject
+		{
+			[UsedImplicitly]
+			public string Message { get; set; }
+
+			[UsedImplicitly]
+			public List<Dictionary<int, string>> Dictionaries { get; set; } = new List<Dictionary<int, string>>();
+		}
+	}
+}
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