if err != nil {
		t.Fatal(err)
	}

	var nextFiles []string
	if v := runtime.Version(); strings.Contains(v, "devel") || strings.Contains(v, "beta") {
		next, err := filepath.Glob(filepath.Join(testenv.GOROOT(t), "api/next/*.txt"))
		if err != nil {
			t.Fatal(err)
		}
		nextFiles = next
	}

	for _, c := range contexts {