Fix rspec failures

app/models/ci/pipeline.rb

@@ -198,12 +198,14 @@ module Ci
     def self.newest_first(ref: nil, limit: 100)
       relation = order(id: :desc)
       relation = relation.where(ref: ref) if ref
+
       if limit
         ids = relation.limit(limit).select(:id)
         # MySQL does not support limit in subquery
         ids = ids.pluck(:id) if Gitlab::Database.mysql?
         relation = relation.where(id: ids)
       end
+
       relation
     end
 

spec/models/ci/pipeline_spec.rb

@@ -1052,6 +1052,11 @@ describe Ci::Pipeline, :mailer do
       expect(described_class.newest_first.pluck(:status))
         .to eq(%w[skipped failed success canceled])
     end
+
+    it 'searches limited backlog' do
+      expect(described_class.newest_first(limit: 1).pluck(:status))
+        .to eq(%w[skipped])
+    end
   end
 
   describe '.latest_status' do