Before:
```
$ bundle exec rspec -e ".render_as"
(...)
Run options: include {:full_description=>/\.render_as/}
WARNING: Using the `raise_error` matcher without providing a specific error or message risks false positives, since `raise_error` will match when Ruby raises a `NoMethodError`, `NameError` or `ArgumentError`, potentially allowing the expectation to pass without even executing the method you are intending to call. Actual error raised was #<ActionController::BadRequest: report_format should be in [:csv, :json, :html, :xlsx, :pdf]>. Instead consider providing a specific error class or message. This message can be suppressed by setting: `RSpec::Expectations.configuration.on_potential_false_positives = :nothing`. Called from /path/to/spec/lib/reports/report_renderer_spec.rb:34:in `block (3 levels) in <main>'.
.
Finished in 0.02544 seconds (files took 4.08 seconds to load)
1 example, 0 failures
```
After this patch:
```
$ bundle exec rspec -e ".render_as"
(...)
Run options: include {:full_description=>/\.render_as/}
.
Finished in 0.02488 seconds (files took 4.09 seconds to load)
1 example, 0 failures
```
