diff --git a/Directory.Packages.props b/Directory.Packages.props
index c6798931317..35af6ec1040 100644
--- a/Directory.Packages.props
+++ b/Directory.Packages.props
@@ -45,6 +45,6 @@
     <PackageVersion Include="Verify.DiffPlex" Version="2.3.0" />
     <PackageVersion Include="Verify.Xunit" Version="22.1.4" />
     <PackageVersion Include="xunit.runner.visualstudio" Version="2.5.3" />
-    <PackageVersion Include="xunit" Version="2.5.3" />
+    <PackageVersion Include="xunit" Version="2.6.1" />
   </ItemGroup>
-</Project>
\ No newline at end of file
+</Project>
diff --git a/test/Docfx.Common.Tests/ConvertToObjectHelperTest.cs b/test/Docfx.Common.Tests/ConvertToObjectHelperTest.cs
index c0f0b20ca43..2ee62694c6b 100644
--- a/test/Docfx.Common.Tests/ConvertToObjectHelperTest.cs
+++ b/test/Docfx.Common.Tests/ConvertToObjectHelperTest.cs
@@ -64,7 +64,7 @@ public void ConvertObjectWithCircularReferenceToDynamic()
         a["key1"] = a;
 
         dynamic converted = ConvertToObjectHelper.ConvertToDynamic(a);
-        Assert.Equal(converted.key1, converted);
+        Assert.Same(converted.key1, converted);
         Assert.Equal("value", converted.key1.key);
 
         Dictionary<string, object> obj = ConvertToObjectHelper.ConvertExpandoObjectToObject(converted);