Just add a new class to locate the expand button

app/views/projects/deploy_keys/_index.html.haml

@@ -3,7 +3,7 @@
   .settings-header
     %h4
       Deploy Keys
-    %button.btn.js-settings-toggle
+    %button.btn.js-settings-toggle.qa-expand-deploy-keys
       = expanded ? 'Collapse' : 'Expand'
     %p
       Deploy keys allow read-only or read-write (if enabled) access to your repository. Deploy keys can be used for CI, staging or production servers. You can create a deploy key or add an existing one.

qa/qa/page/project/settings/repository.rb

@@ -5,11 +5,7 @@ module QA
         class Repository < Page::Base
           def expand(title)
             page.within('#content-body') do
-              find(
-                :xpath,
-                "//button[contains(text(), 'Expand')]" +
-                  "[../h4[contains(text(), '#{title}')]]"
-              ).click
+              find('.qa-expand-deploy-keys').click
             end
           end
         end