diff --git a/SharpNBT.Tests/SharpNBT.Tests.csproj b/SharpNBT.Tests/SharpNBT.Tests.csproj
index 15aafb5..9fb8c29 100644
--- a/SharpNBT.Tests/SharpNBT.Tests.csproj
+++ b/SharpNBT.Tests/SharpNBT.Tests.csproj
@@ -1,9 +1,13 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>net5.0</TargetFramework>
+        <TargetFramework>net7.0</TargetFramework>
 
         <IsPackable>false</IsPackable>
+
+        <LangVersion>latestmajor</LangVersion>
+
+        <Nullable>enable</Nullable>
     </PropertyGroup>
 
     <ItemGroup>
diff --git a/SharpNBT.Tests/TestHelper.cs b/SharpNBT.Tests/TestHelper.cs
index 809a86e..9b7960e 100644
--- a/SharpNBT.Tests/TestHelper.cs
+++ b/SharpNBT.Tests/TestHelper.cs
@@ -2,7 +2,6 @@ using System;
 using System.IO;
 using System.IO.Compression;
 using System.Reflection;
-using SharpNBT.ZLib;
 
 namespace SharpNBT.Tests
 {