if !isTestParam(fn.Type.Params.List[0].Type, prefix[:1]) {
		return
	}

	if tparams := fn.Type.TypeParams; tparams != nil && len(tparams.List) > 0 {
		// Note: cmd/go/internal/load also errors about TestXXX and BenchmarkXXX functions with type parameters.
		// We have currently decided to also warn before compilation/package loading. This can help users in IDEs.
		at := tokenRange{tparams.Opening, tparams.Closing}