diff --git a/test/LibDeflate.DangerousTests/LibDeflate.DangerousTests.csproj b/test/LibDeflate.DangerousTests/LibDeflate.DangerousTests.csproj
index c0837af..7fb0d87 100644
--- a/test/LibDeflate.DangerousTests/LibDeflate.DangerousTests.csproj
+++ b/test/LibDeflate.DangerousTests/LibDeflate.DangerousTests.csproj
@@ -4,12 +4,9 @@
     <TargetFrameworks>net6.0;net7.0</TargetFrameworks>
 
     <IsPackable>false</IsPackable>
+    <LangVersion>latest</LangVersion>
   </PropertyGroup>
 
-  <ItemGroup>
-    <None Remove="xunit.runner.json" />
-  </ItemGroup>
-
   <ItemGroup>
     <Content Include="xunit.runner.json">
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
@@ -18,8 +15,8 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="xunit" Version="2.5.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.0">
+    <PackageReference Include="xunit" Version="2.5.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.1">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>
diff --git a/test/LibDeflate.Tests/LibDeflate.Tests.csproj b/test/LibDeflate.Tests/LibDeflate.Tests.csproj
index 5c6813f..80c11b0 100644
--- a/test/LibDeflate.Tests/LibDeflate.Tests.csproj
+++ b/test/LibDeflate.Tests/LibDeflate.Tests.csproj
@@ -1,5 +1,8 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
+  <!-- Why don't we test netXXX when we support netstandard2.0? -->
+  <!-- https://gist.github.com/jzebedee/d5e6c726692b83baf68fb5fc241c2929 -->
+  
   <PropertyGroup>
     <TargetFrameworks>net6.0;net7.0</TargetFrameworks>
 
@@ -9,8 +12,8 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="xunit" Version="2.5.0" />
-    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.0">
+    <PackageReference Include="xunit" Version="2.5.1" />
+    <PackageReference Include="xunit.runner.visualstudio" Version="2.5.1">
       <IncludeAssets>runtime; build; native; contentfiles; analyzers; buildtransitive</IncludeAssets>
       <PrivateAssets>all</PrivateAssets>
     </PackageReference>