diff --git a/test/Directory.Build.props b/test/Directory.Build.props
index 980f4c83a2b..e363febfdd8 100644
--- a/test/Directory.Build.props
+++ b/test/Directory.Build.props
@@ -35,7 +35,7 @@
   </ItemGroup>
 
   <ItemGroup>
-    <PackageReference Include="FluentAssertions" />
+    <PackageReference Include="AwesomeAssertions" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" />
     <PackageReference Include="xunit.runner.visualstudio" />
     <PackageReference Include="xunit" />
diff --git a/test/Directory.Packages.props b/test/Directory.Packages.props
index ea8bad2e500..789d50a4d95 100644
--- a/test/Directory.Packages.props
+++ b/test/Directory.Packages.props
@@ -3,7 +3,7 @@
   <Import Project="$([MSBuild]::GetPathOfFileAbove('$(MSBuildThisFile)', '$(MSBuildThisFileDirectory)../'))" />
 
   <ItemGroup>
-    <PackageVersion Include="FluentAssertions" Version="[7.1.0]" />
+    <PackageVersion Include="AwesomeAssertions" Version="8.0.1" />
     <PackageVersion Include="Microsoft.NET.Test.Sdk" Version="17.13.0" />
     <PackageVersion Include="Verify.DiffPlex" Version="3.1.2" />
     <PackageVersion Include="Verify.Xunit" Version="28.12.1" />
diff --git a/test/docfx.Tests/SerializationTests/JsonSerializationTest.cs b/test/docfx.Tests/SerializationTests/JsonSerializationTest.cs
index b751e20b36a..efc3b471eaa 100644
--- a/test/docfx.Tests/SerializationTests/JsonSerializationTest.cs
+++ b/test/docfx.Tests/SerializationTests/JsonSerializationTest.cs
@@ -33,7 +33,7 @@ protected void ValidateJsonRoundTrip<T>(T model)
         result.Should().BeEquivalentTo(model, customAssertionOptions);
     }
 
-    private static EquivalencyAssertionOptions<T> customAssertionOptions<T>(EquivalencyAssertionOptions<T> opt)
+    private static EquivalencyOptions<T> customAssertionOptions<T>(EquivalencyOptions<T> opt)
     {
         // By default. JsonElement is compared by reference because JsonElement don't override Equals.
         return opt.ComparingByMembers<JsonElement>()
diff --git a/test/docfx.Tests/SerializationTests/Shared/CustomEqualityEquivalencyStep.cs b/test/docfx.Tests/SerializationTests/Shared/CustomEqualityEquivalencyStep.cs
index 1a1b2380c34..6e107f511d4 100644
--- a/test/docfx.Tests/SerializationTests/Shared/CustomEqualityEquivalencyStep.cs
+++ b/test/docfx.Tests/SerializationTests/Shared/CustomEqualityEquivalencyStep.cs
@@ -13,7 +13,7 @@ internal class CustomEqualityEquivalencyStep : IEquivalencyStep
     public EquivalencyResult Handle(
         Comparands comparands,
         IEquivalencyValidationContext context,
-        IEquivalencyValidator nestedValidator)
+        IValidateChildNodeEquivalency nestedValidator)
     {
         if (comparands.Subject is null || comparands.Expectation is null)
             return EquivalencyResult.ContinueWithNext;
diff --git a/test/docfx.Tests/SerializationTests/YamlSerializationTest.cs b/test/docfx.Tests/SerializationTests/YamlSerializationTest.cs
index 96088759bcb..badbc3ccc32 100644
--- a/test/docfx.Tests/SerializationTests/YamlSerializationTest.cs
+++ b/test/docfx.Tests/SerializationTests/YamlSerializationTest.cs
@@ -55,7 +55,7 @@ protected void ValidateYamlJsonRoundTrip<T>(T model)
         newtownsoftJsonModel.Should().BeEquivalentTo(systemTextJsonModel, customAssertionOptions);
     }
 
-    private static EquivalencyAssertionOptions<T> customAssertionOptions<T>(EquivalencyAssertionOptions<T> opt)
+    private static EquivalencyOptions<T> customAssertionOptions<T>(EquivalencyOptions<T> opt)
     {
         // By default. JsonElement is compared by reference because JsonElement don't override Equals.
         return opt.ComparingByMembers<JsonElement>()