base := environment.MustBaseEnvSet(environment.DefaultCompatibilityVersion(), strictCost)
	extended, err := base.Extend(environment.VersionedOptions{
		IntroducedVersion: version.MustParseGeneric("1.999"),
		EnvOptions:        []cel.EnvOption{library.Test()},
	})
	if err != nil {
		t.Fatal(err)
	}
	if strictCost {
		strictStatelessCELCompiler = plugincel.NewCompiler(extended)

			return 0, 0, fmt.Errorf("failed to get kernel version, unable to determine if feature %s can be supported : %w",
				features.UserNamespacesSupport, err)
		}
		if kernelVersion != nil && !kernelVersion.AtLeast(version.MustParseGeneric(utilkernel.UserNamespacesSupportKernelVersion)) {
			klog.InfoS("WARNING: the kernel version is incompatible with the feature gate, which needs as a minimum kernel version",