This way it's more clear what the user experience is during the process.
Note this did not result in flaky tests, since the tests continue by
clicking links, that are only present after the request has finished.
However, we're adding expectations so we don't have to think whether the
tests could be flaky and because this way we're also testing the user
experience; it would be strange for a user if they were redirected to a
page without a flash message.
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