features/project/source/markdown_render.feature fails on master

https://gitlab.com/gitlab-org/gitlab-ee/builds/18165993

Feature: Project Source Markdown Render

  Scenario: I navigate to doc directory to view documentation in markdown # features/project/source/markdown_render.feature:51
    ✔  Given I sign in as a user                        # features/steps/shared/authentication.rb:7
    ✔  And I own project "Delta"                        # features/steps/project/source/markdown_render.rb:10
    ✔  And I visit markdown branch                      # features/steps/project/source/markdown_render.rb:121
    ✔  And I navigate to the doc/api/README             # features/steps/project/source/markdown_render.rb:84
    HTML screenshot: /builds/gitlab-org/gitlab-ee/tmp/capybara/screenshot_2017-06-08-07-26-22.330.html
    Image screenshot: /builds/gitlab-org/gitlab-ee/tmp/capybara/screenshot_2017-06-08-07-26-22.330.png
    ✘  And I see correct file rendered                  # features/steps/project/source/markdown_render.rb:98
    ~  And I click on users in doc/api/README           
    ~  Then I should see the correct document file      

        
        expected: "/user1/gitlabhq/blob/markdown/doc/api/README.md"
             got: "/user1/gitlabhq/tree/markdown/doc/api"
        
        (compared using ==)
        /builds/gitlab-org/gitlab-ee/vendor/ruby/2.3.0/gems/rspec-support-3.5.0/lib/rspec/support.rb:87:in `block in <module:Support>'

Error summary:
  Failures (1)
    Project Source Markdown Render :: I navigate to doc directory to view documentation in markdown :: And I see correct file rendered


Knapsack global time execution for tests: 20s
Knapsack report was generated. Preview:
{
  "features/project/source/markdown_render.feature": 20.553019523620605
}

Steps Summary: (4) Successful, (0) Pending, (0) Undefined, (1) Failed, (0) Error

I can reproduce locally on CE and EE, but CE master is green?