diff --git a/src/Avalonia.Samples/Testing/TestableApp.Headless.NUnit/TestableApp.Headless.NUnit.csproj b/src/Avalonia.Samples/Testing/TestableApp.Headless.NUnit/TestableApp.Headless.NUnit.csproj
index 707de1d..16a1c25 100644
--- a/src/Avalonia.Samples/Testing/TestableApp.Headless.NUnit/TestableApp.Headless.NUnit.csproj
+++ b/src/Avalonia.Samples/Testing/TestableApp.Headless.NUnit/TestableApp.Headless.NUnit.csproj
@@ -11,7 +11,7 @@
   <ItemGroup>
     <PackageReference Include="Avalonia.Headless.NUnit" Version="11.0.0" />
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.6.0" />
-    <PackageReference Include="NUnit" Version="3.13.3" />
+    <PackageReference Include="NUnit" Version="4.3.2" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.2.1" />
     <PackageReference Include="NUnit.Analyzers" Version="3.6.1" />
     <PackageReference Include="coverlet.collector" Version="6.0.0" />