DB speedup in API:: controller/request specs (#25516)

spec/controllers/api/v1/conversations_controller_spec.rb

@@ -21,17 +21,14 @@ RSpec.describe Api::V1::ConversationsController do
       PostStatusService.new.call(user.account, text: 'Hey, nobody here', visibility: 'direct')
     end
 
-    it 'returns http success' do
-      get :index
-      expect(response).to have_http_status(200)
-    end
-
-    it 'returns pagination headers' do
+    it 'returns pagination headers', :aggregate_failures do
       get :index, params: { limit: 1 }
+
+      expect(response).to have_http_status(200)
       expect(response.headers['Link'].links.size).to eq(2)
     end
 
-    it 'returns conversations' do
+    it 'returns conversations', :aggregate_failures do
       get :index
       json = body_as_json
       expect(json.size).to eq 2