Fix findertest readability

| Q             | A
| ------------- | ---
| Bug fix?      | [yes]
| New feature?  | [no]
| BC breaks?    | [no]
| Deprecations? | [no]
| Tests pass?   | [yes]
| Fixed tickets | part of 11631, 11588
| License       | MIT

When running on Ubuntu it is hard to setup an account that allows the `chmod` to downgrade the rights on a directory but is not allow to read from the downgraded directory.