diff --git a/test/docfx.Tests/SerializationTests/TestData/ApiPage/ApiPage.yml b/test/docfx.Tests/SerializationTests/TestData/ApiPage/ApiPage.yml
new file mode 100644
index 00000000000..b25d28d2265
--- /dev/null
+++ b/test/docfx.Tests/SerializationTests/TestData/ApiPage/ApiPage.yml
@@ -0,0 +1,15 @@
+### YamlMime:ApiPage
+title: Class Class1
+body:
+- api1: Class Class1
+  id: BuildFromAssembly_Class1
+  metadata:
+    uid: BuildFromAssembly.Class1
+    commentId: T:BuildFromAssembly.Class1
+languageId: csharp
+metadata:
+  description: This is a test class.
+  listOfString:
+    - aaa
+    - bbb
+    - ccc 
diff --git a/test/docfx.Tests/SerializationTests/TestData/ApiPage/BuildFromAssembly.Class1.yml b/test/docfx.Tests/SerializationTests/TestData/ApiPage/BuildFromAssembly.Class1.yml
new file mode 100644
index 00000000000..6311af13cfa
--- /dev/null
+++ b/test/docfx.Tests/SerializationTests/TestData/ApiPage/BuildFromAssembly.Class1.yml
@@ -0,0 +1,57 @@
+### YamlMime:ApiPage
+title: Class Class1
+body:
+- api1: Class Class1
+  id: BuildFromAssembly_Class1
+  metadata:
+    uid: BuildFromAssembly.Class1
+    commentId: T:BuildFromAssembly.Class1
+- facts:
+  - name: Namespace
+    value:
+      text: BuildFromAssembly
+      url: BuildFromAssembly.html
+  - name: Assembly
+    value: BuildFromAssembly.dll
+- markdown: This is a test class.
+- code: public class Class1
+- h4: Inheritance
+- inheritance:
+  - text: object
+    url: https://learn.microsoft.com/dotnet/api/system.object
+  - text: Class1
+    url: BuildFromAssembly.Class1.html
+- h4: Inherited Members
+- list:
+  - text: object.GetType()
+    url: https://learn.microsoft.com/dotnet/api/system.object.gettype
+  - text: object.MemberwiseClone()
+    url: https://learn.microsoft.com/dotnet/api/system.object.memberwiseclone
+  - text: object.ToString()
+    url: https://learn.microsoft.com/dotnet/api/system.object.tostring
+  - text: object.Equals(object?)
+    url: https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals(system-object)
+  - text: object.Equals(object?, object?)
+    url: https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals(system-object-system-object)
+  - text: object.ReferenceEquals(object?, object?)
+    url: https://learn.microsoft.com/dotnet/api/system.object.referenceequals
+  - text: object.GetHashCode()
+    url: https://learn.microsoft.com/dotnet/api/system.object.gethashcode
+- h2: Constructors
+- api3: Class1()
+  id: BuildFromAssembly_Class1__ctor
+  metadata:
+    uid: BuildFromAssembly.Class1.#ctor
+    commentId: M:BuildFromAssembly.Class1.#ctor
+- code: public Class1()
+- h2: Methods
+- api3: HelloWorld()
+  id: BuildFromAssembly_Class1_HelloWorld
+  metadata:
+    uid: BuildFromAssembly.Class1.HelloWorld
+    commentId: M:BuildFromAssembly.Class1.HelloWorld
+- markdown: Hello World.
+- code: public static void HelloWorld()
+languageId: csharp
+metadata:
+  description: This is a test class.
diff --git a/test/docfx.Tests/SerializationTests/TestData/ApiPage/BuildFromAssembly.Issue5432.yml b/test/docfx.Tests/SerializationTests/TestData/ApiPage/BuildFromAssembly.Issue5432.yml
new file mode 100644
index 00000000000..969ab4f0858
--- /dev/null
+++ b/test/docfx.Tests/SerializationTests/TestData/ApiPage/BuildFromAssembly.Issue5432.yml
@@ -0,0 +1,43 @@
+### YamlMime:ApiPage
+title: Struct Issue5432
+body:
+- api1: Struct Issue5432
+  id: BuildFromAssembly_Issue5432
+  metadata:
+    uid: BuildFromAssembly.Issue5432
+    commentId: T:BuildFromAssembly.Issue5432
+- facts:
+  - name: Namespace
+    value:
+      text: BuildFromAssembly
+      url: BuildFromAssembly.html
+  - name: Assembly
+    value: BuildFromAssembly.dll
+- code: public struct Issue5432
+- h4: Inherited Members
+- list:
+  - text: object.GetType()
+    url: https://learn.microsoft.com/dotnet/api/system.object.gettype
+  - text: object.ToString()
+    url: https://learn.microsoft.com/dotnet/api/system.object.tostring
+  - text: object.Equals(object?)
+    url: https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals(system-object)
+  - text: object.Equals(object?, object?)
+    url: https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals(system-object-system-object)
+  - text: object.ReferenceEquals(object?, object?)
+    url: https://learn.microsoft.com/dotnet/api/system.object.referenceequals
+  - text: object.GetHashCode()
+    url: https://learn.microsoft.com/dotnet/api/system.object.gethashcode
+- h2: Properties
+- api3: Name
+  id: BuildFromAssembly_Issue5432_Name
+  metadata:
+    uid: BuildFromAssembly.Issue5432.Name
+    commentId: P:BuildFromAssembly.Issue5432.Name
+- code: public string Name { get; }
+- h4: Property Value
+- parameters:
+  - type:
+    - text: string
+      url: https://learn.microsoft.com/dotnet/api/system.string
+languageId: csharp
diff --git a/test/docfx.Tests/SerializationTests/TestData/ApiPage/BuildFromProject.Class1.Issue8696Attribute.yml b/test/docfx.Tests/SerializationTests/TestData/ApiPage/BuildFromProject.Class1.Issue8696Attribute.yml
new file mode 100644
index 00000000000..5ac63efdba0
--- /dev/null
+++ b/test/docfx.Tests/SerializationTests/TestData/ApiPage/BuildFromProject.Class1.Issue8696Attribute.yml
@@ -0,0 +1,165 @@
+### YamlMime:ApiPage
+title: Class Class1.Issue8696Attribute
+body:
+- api1: Class Class1.Issue8696Attribute
+  id: BuildFromProject_Class1_Issue8696Attribute
+  preview: "[DOCFX001](https://example.org/DOCFX001): 'BuildFromProject.Class1.Issue8696Attribute' is for evaluation purposes only and is subject to change or removal in future updates."
+  src: https://github.com/dotnet/docfx/blob/main/samples/seed/dotnet/project/Project/Class1.cs#L126
+  metadata:
+    uid: BuildFromProject.Class1.Issue8696Attribute
+    commentId: T:BuildFromProject.Class1.Issue8696Attribute
+- facts:
+  - name: Namespace
+    value:
+      text: BuildFromProject
+      url: BuildFromProject.html
+  - name: Assembly
+    value: BuildFromProject.dll
+- code: 'public class Class1.Issue8696Attribute : Attribute'
+- h4: Inheritance
+- inheritance:
+  - text: object
+    url: https://learn.microsoft.com/dotnet/api/system.object
+  - text: Attribute
+    url: https://learn.microsoft.com/dotnet/api/system.attribute
+  - text: Class1.Issue8696Attribute
+    url: BuildFromProject.Class1.Issue8696Attribute.html
+- h4: Inherited Members
+- list:
+  - text: Attribute.Equals(object?)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.equals
+  - text: Attribute.GetCustomAttribute(Assembly, Type)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattribute#system-attribute-getcustomattribute(system-reflection-assembly-system-type)
+  - text: Attribute.GetCustomAttribute(Assembly, Type, bool)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattribute#system-attribute-getcustomattribute(system-reflection-assembly-system-type-system-boolean)
+  - text: Attribute.GetCustomAttribute(MemberInfo, Type)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattribute#system-attribute-getcustomattribute(system-reflection-memberinfo-system-type)
+  - text: Attribute.GetCustomAttribute(MemberInfo, Type, bool)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattribute#system-attribute-getcustomattribute(system-reflection-memberinfo-system-type-system-boolean)
+  - text: Attribute.GetCustomAttribute(Module, Type)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattribute#system-attribute-getcustomattribute(system-reflection-module-system-type)
+  - text: Attribute.GetCustomAttribute(Module, Type, bool)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattribute#system-attribute-getcustomattribute(system-reflection-module-system-type-system-boolean)
+  - text: Attribute.GetCustomAttribute(ParameterInfo, Type)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattribute#system-attribute-getcustomattribute(system-reflection-parameterinfo-system-type)
+  - text: Attribute.GetCustomAttribute(ParameterInfo, Type, bool)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattribute#system-attribute-getcustomattribute(system-reflection-parameterinfo-system-type-system-boolean)
+  - text: Attribute.GetCustomAttributes(Assembly)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattributes#system-attribute-getcustomattributes(system-reflection-assembly)
+  - text: Attribute.GetCustomAttributes(Assembly, bool)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattributes#system-attribute-getcustomattributes(system-reflection-assembly-system-boolean)
+  - text: Attribute.GetCustomAttributes(Assembly, Type)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattributes#system-attribute-getcustomattributes(system-reflection-assembly-system-type)
+  - text: Attribute.GetCustomAttributes(Assembly, Type, bool)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattributes#system-attribute-getcustomattributes(system-reflection-assembly-system-type-system-boolean)
+  - text: Attribute.GetCustomAttributes(MemberInfo)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattributes#system-attribute-getcustomattributes(system-reflection-memberinfo)
+  - text: Attribute.GetCustomAttributes(MemberInfo, bool)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattributes#system-attribute-getcustomattributes(system-reflection-memberinfo-system-boolean)
+  - text: Attribute.GetCustomAttributes(MemberInfo, Type)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattributes#system-attribute-getcustomattributes(system-reflection-memberinfo-system-type)
+  - text: Attribute.GetCustomAttributes(MemberInfo, Type, bool)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattributes#system-attribute-getcustomattributes(system-reflection-memberinfo-system-type-system-boolean)
+  - text: Attribute.GetCustomAttributes(Module)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattributes#system-attribute-getcustomattributes(system-reflection-module)
+  - text: Attribute.GetCustomAttributes(Module, bool)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattributes#system-attribute-getcustomattributes(system-reflection-module-system-boolean)
+  - text: Attribute.GetCustomAttributes(Module, Type)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattributes#system-attribute-getcustomattributes(system-reflection-module-system-type)
+  - text: Attribute.GetCustomAttributes(Module, Type, bool)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattributes#system-attribute-getcustomattributes(system-reflection-module-system-type-system-boolean)
+  - text: Attribute.GetCustomAttributes(ParameterInfo)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattributes#system-attribute-getcustomattributes(system-reflection-parameterinfo)
+  - text: Attribute.GetCustomAttributes(ParameterInfo, bool)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattributes#system-attribute-getcustomattributes(system-reflection-parameterinfo-system-boolean)
+  - text: Attribute.GetCustomAttributes(ParameterInfo, Type)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattributes#system-attribute-getcustomattributes(system-reflection-parameterinfo-system-type)
+  - text: Attribute.GetCustomAttributes(ParameterInfo, Type, bool)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.getcustomattributes#system-attribute-getcustomattributes(system-reflection-parameterinfo-system-type-system-boolean)
+  - text: Attribute.GetHashCode()
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.gethashcode
+  - text: Attribute.IsDefaultAttribute()
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.isdefaultattribute
+  - text: Attribute.IsDefined(Assembly, Type)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.isdefined#system-attribute-isdefined(system-reflection-assembly-system-type)
+  - text: Attribute.IsDefined(Assembly, Type, bool)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.isdefined#system-attribute-isdefined(system-reflection-assembly-system-type-system-boolean)
+  - text: Attribute.IsDefined(MemberInfo, Type)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.isdefined#system-attribute-isdefined(system-reflection-memberinfo-system-type)
+  - text: Attribute.IsDefined(MemberInfo, Type, bool)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.isdefined#system-attribute-isdefined(system-reflection-memberinfo-system-type-system-boolean)
+  - text: Attribute.IsDefined(Module, Type)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.isdefined#system-attribute-isdefined(system-reflection-module-system-type)
+  - text: Attribute.IsDefined(Module, Type, bool)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.isdefined#system-attribute-isdefined(system-reflection-module-system-type-system-boolean)
+  - text: Attribute.IsDefined(ParameterInfo, Type)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.isdefined#system-attribute-isdefined(system-reflection-parameterinfo-system-type)
+  - text: Attribute.IsDefined(ParameterInfo, Type, bool)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.isdefined#system-attribute-isdefined(system-reflection-parameterinfo-system-type-system-boolean)
+  - text: Attribute.Match(object?)
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.match
+  - text: Attribute.TypeId
+    url: https://learn.microsoft.com/dotnet/api/system.attribute.typeid
+  - text: object.Equals(object?)
+    url: https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals(system-object)
+  - text: object.Equals(object?, object?)
+    url: https://learn.microsoft.com/dotnet/api/system.object.equals#system-object-equals(system-object-system-object)
+  - text: object.GetHashCode()
+    url: https://learn.microsoft.com/dotnet/api/system.object.gethashcode
+  - text: object.GetType()
+    url: https://learn.microsoft.com/dotnet/api/system.object.gettype
+  - text: object.MemberwiseClone()
+    url: https://learn.microsoft.com/dotnet/api/system.object.memberwiseclone
+  - text: object.ReferenceEquals(object?, object?)
+    url: https://learn.microsoft.com/dotnet/api/system.object.referenceequals
+  - text: object.ToString()
+    url: https://learn.microsoft.com/dotnet/api/system.object.tostring
+- h2: Constructors
+- api3: Issue8696Attribute(string?, int, int, string[]?, bool, Type?)
+  id: BuildFromProject_Class1_Issue8696Attribute__ctor_System_String_System_Int32_System_Int32_System_String___System_Boolean_System_Type_
+  src: https://github.com/dotnet/docfx/blob/main/samples/seed/dotnet/project/Project/Class1.cs#L128
+  metadata:
+    uid: BuildFromProject.Class1.Issue8696Attribute.#ctor(System.String,System.Int32,System.Int32,System.String[],System.Boolean,System.Type)
+    commentId: M:BuildFromProject.Class1.Issue8696Attribute.#ctor(System.String,System.Int32,System.Int32,System.String[],System.Boolean,System.Type)
+- code: >-
+    [Class1.Issue8696("Changes the name of the server in the server list", 0, 0, null, false, null)]
+
+    public Issue8696Attribute(string? description = null, int boundsMin = 0, int boundsMax = 0, string[]? validGameModes = null, bool hasMultipleSelections = false, Type? enumType = null)
+- h4: Parameters
+- parameters:
+  - name: description
+    type:
+    - text: string
+      url: https://learn.microsoft.com/dotnet/api/system.string
+    - '?'
+    optional: true
+  - name: boundsMin
+    type:
+    - text: int
+      url: https://learn.microsoft.com/dotnet/api/system.int32
+    optional: true
+  - name: boundsMax
+    type:
+    - text: int
+      url: https://learn.microsoft.com/dotnet/api/system.int32
+    optional: true
+  - name: validGameModes
+    type:
+    - text: string
+      url: https://learn.microsoft.com/dotnet/api/system.string
+    - '['
+    - ']'
+    - '?'
+    optional: true
+  - name: hasMultipleSelections
+    type:
+    - text: bool
+      url: https://learn.microsoft.com/dotnet/api/system.boolean
+    optional: true
+  - name: enumType
+    type:
+    - text: Type
+      url: https://learn.microsoft.com/dotnet/api/system.type
+    - '?'
+    optional: true
+languageId: csharp
diff --git a/test/docfx.Tests/SerializationTests/YamlSerializationTest.ApiPage.cs b/test/docfx.Tests/SerializationTests/YamlSerializationTest.ApiPage.cs
new file mode 100644
index 00000000000..c0db0066478
--- /dev/null
+++ b/test/docfx.Tests/SerializationTests/YamlSerializationTest.ApiPage.cs
@@ -0,0 +1,84 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+using System.Diagnostics;
+using System.IO;
+using System.Net;
+using System.Runtime.CompilerServices;
+using System.Text.Json;
+using Docfx.Build.ApiPage;
+using Docfx.Build.ManagedReference;
+using Docfx.Common;
+using Docfx.DataContracts.ManagedReference;
+using Docfx.Tests;
+using FluentAssertions;
+using Microsoft.Playwright;
+using OneOf;
+using YamlDotNet.Serialization;
+
+namespace docfx.Tests;
+
+public partial class YamlSerializationTest
+{
+    [Theory]
+    [TestData<ApiPage>]
+    public void YamlSerializationTest_ApiPage(string path)
+    {
+        // Arrange
+        var model = LoadApiPage(path); // Note: Loading ApiPage YAML file requires custom logics.
+
+        // Act/Assert
+        ValidateApiPageRoundTrip(model);
+    }
+
+    /// <summary>
+    /// 
+    /// </summary>
+    private static ApiPage LoadApiPage(string path)
+    {
+        path = PathHelper.ResolveTestDataPath(path);
+
+        var deserializer = new DeserializerBuilder().WithAttemptingUnquotedStringTypeDeserialization()
+                                                    .Build();
+
+        // 1. Deserialize ApiPage yaml as Dictionary
+        // 2. Serialize to json
+        // 3. Deserialize as ApiPage instance
+        var model = deserializer.Deserialize<Dictionary<object, object>>(File.ReadAllText(path));
+        var json = JsonSerializer.Serialize(model);
+        return JsonSerializer.Deserialize<ApiPage>(json, ApiPage.JsonSerializerOptions);
+    }
+
+    private static void ValidateApiPageRoundTrip(ApiPage model)
+    {
+        // Act
+        var yaml = ToYaml(model);
+        var result = ToApiPage(yaml);
+
+        // Assert
+
+        // ApiPage model can't be validated with `BeEquivalentTo` (See: https://github.com/dotnet/docfx/pull/10232)
+        // So compare serialized YAML contents.
+        ToYaml(result).Should().Be(yaml);
+    }
+
+    private static string ToYaml(ApiPage model)
+    {
+        var deserializer = new DeserializerBuilder().WithAttemptingUnquotedStringTypeDeserialization().Build();
+
+        var json = JsonSerializer.Serialize(model, Docfx.Build.ApiPage.ApiPage.JsonSerializerOptions);
+        var obj = deserializer.Deserialize(json);
+
+        using var writer = new StringWriter();
+        YamlUtility.Serialize(writer, obj, "YamlMime:ApiPage");
+        return writer.ToString();
+    }
+
+    private static ApiPage ToApiPage(string yaml)
+    {
+        var deserializer = new DeserializerBuilder().WithAttemptingUnquotedStringTypeDeserialization().Build();
+        var dict = deserializer.Deserialize<Dictionary<object, object>>(new StringReader(yaml));
+        var json = JsonSerializer.Serialize(dict);
+        return JsonSerializer.Deserialize<ApiPage>(json, ApiPage.JsonSerializerOptions);
+    }
+}