Broken master in ./spec/lib/gitlab/kubernetes/helm/parsers/list_v2_spec.rb:59

Job #551700044 failed for 565f7f09:

 Failures:
  1) Gitlab::Kubernetes::Helm::Parsers::ListV2#initialize raises an error on invalid JSON
     Failure/Error:
       expect do
         described_class.new('')
       end.to raise_error(described_class::ParserError, 'A JSON text must at least contain two octets!')
       expected Gitlab::Kubernetes::Helm::Parsers::ListV2::ParserError with "A JSON text must at least contain two octets!", got #<Gitlab::Kubernetes::Helm::Parsers::ListV2::ParserError: 783: unexpected token at ''> with backtrace:
         # ./lib/gitlab/kubernetes/helm/parsers/list_v2.rb:17:in `rescue in initialize'
         # ./lib/gitlab/kubernetes/helm/parsers/list_v2.rb:13:in `initialize'
         # ./spec/lib/gitlab/kubernetes/helm/parsers/list_v2_spec.rb:61:in `new'
         # ./spec/lib/gitlab/kubernetes/helm/parsers/list_v2_spec.rb:61:in `block (4 levels) in <top (required)>'

Looks like the exception message changed when we upgraded the JSON gem.