Thank you for reviewing the patch. My understanding is that the next major release is 4.2.0, and the next minor release is 4.1.2.
I have just checked the following files and no other cases are found.
$ grep -lr "^\s*private\s*$" test
test/mocks/open_id_authentication_mock.rb
test/unit/project_nested_set_test.rb
test/unit/mailer_localisation_test.rb
test/unit/mailer_test.rb
test/unit/version_test.rb
test/unit/search_test.rb
test/unit/mail_handler_test.rb
test/unit/repository_bazaar_test.rb
test/unit/activity_test.rb
test/unit/lib/redmine/configuration_test.rb
test/unit/lib/redmine/unified_diff_test.rb
test/unit/lib/redmine/scm/adapters/subversion_adapter_test.rb
test/unit/lib/redmine/scm/adapters/bazaar_adapter_test.rb
test/unit/lib/redmine/scm/adapters/cvs_adapter_test.rb
test/unit/lib/redmine/scm/adapters/mercurial_adapter_test.rb
test/unit/lib/redmine/scm/adapters/git_adapter_test.rb
test/unit/lib/redmine/wiki_formatting/markdown_formatter_test.rb
test/unit/lib/redmine/wiki_formatting/textile_formatter_test.rb
test/unit/issue_nested_set_concurrency_test.rb
test/unit/repository_mercurial_test.rb
test/integration/attachments_test.rb
test/integration/sudo_mode_test.rb
test/system/sudo_mode_test.rb
test/helpers/application_helper_test.rb
test/helpers/sort_helper_test.rb
test/coverage/html_formatter.rb
test/functional/repositories_git_controller_test.rb
test/functional/admin_controller_test.rb
test/functional/timelog_custom_fields_visibility_test.rb