【Rspec】Error: raise WrongScopeError の解消法

RSPecでテストを実行すると以下のエラーが発生。

Failure/Error:
       raise WrongScopeError,
             "`#{name}` is not available from within an example (e.g. an " \
             "`it` block) or from constructs that run in the scope of an " \
             "example (e.g. `before`, `let`, etc). It is only available " \
             "on an example group (e.g. a `describe` or `context` block)."
     
       `name` is not available from within an example (e.g. an `it` block) or from constructs that run in the scope of an example (e.g. `before`, `let`, etc). It is only available on an example group (e.g. a `describe` or `context` block).
     
                 raise WrongScopeError,
                 ^^^^^

バージョンを 5.1.1にしたら解消されました！

バージョンが古かったのが原因だと思われます。

gem 'rspec-rails','~> 5.1.1'