diff --git a/tests/UpcloudApiKubernetesOperator.Tests/UpcloudApiKubernetesOperator.Tests.csproj b/tests/UpcloudApiKubernetesOperator.Tests/UpcloudApiKubernetesOperator.Tests.csproj
index a5fff97..b7c1ecf 100644
--- a/tests/UpcloudApiKubernetesOperator.Tests/UpcloudApiKubernetesOperator.Tests.csproj
+++ b/tests/UpcloudApiKubernetesOperator.Tests/UpcloudApiKubernetesOperator.Tests.csproj
@@ -12,7 +12,7 @@
 
   <ItemGroup>
     <PackageReference Include="Microsoft.NET.Test.Sdk" Version="17.7.2" />
-    <PackageReference Include="NUnit" Version="3.13.3" />
+    <PackageReference Include="NUnit" Version="4.0.0" />
     <PackageReference Include="NUnit3TestAdapter" Version="4.5.0" />
     <PackageReference Include="NUnit.Analyzers" Version="3.9.0" />
     <PackageReference Include="coverlet.collector" Version="6.0.0" />