In https://github.com/jenkinsci/jenkins/pull/4835/files#diff-df2e4725157a32efaf285487dbc9accbR33 the tab + changed from a "" to an image. Therefore as of Jenkins 2.246 ATH test plugins.FolderPluginTest.folderViewsTest fails because now this piece of code doesn't remove the "" tab:

https://github.com/jenkinsci/acceptance-test-harness/blob/be0ea7fbb695a5d7239dc70e285947ae2a79c6e0/src/main/java/org/jenkinsci/test/acceptance/po/Folder.java#L132

This code should change to remove the last tab if it's "" (blank) or similar.

Recommended approach

Change the code of getViewTabs to work with versions before 2.246 ("+") and after including 2.246 ("").

Acceptance Criteria

• Fix the ATH failure for this test