assert_select count expected exactly 2 elements matching "a[href="/"]", found 4

I'm trying to check how many links are routed to root_path here is my code for the integration test. My question is why is every route in my _header.html.erb file, when counted by assert_select is being doubled. root_path is used in the page twice <%= link_to "sample app", root_path, id: "logo" %> and

• <%= link_to "Home", root_path %>
• so why is it giving me 4? I'm new to rails and i'm follwing hartls tutorial.

require 'test_helper'
        class SiteLayoutTest < ActionDispatch::IntegrationTest
                test "layout links" do
                get root_path
                assert_template 'static_pages/home'
                assert_select "a[href=?]", root_path, count:2
                assert_select "a[href=?]", help_path
                assert_select "a[href=?]", about_path
                assert_select "a[href=?]", contact_path
        end
end

and this is the partial code for my html file (_header.html.erb)

<header class="nav-bar navbar-fixed-top navbar-inverse" id="header">
                        <div class="container">
                                <%= link_to "sample app", root_path, id: "logo" %>
                                <nav>
                                        <ul class="nav navbar-nav navbar-right">
                                                <li> <%= link_to "Home", root_path %> </li>
                                                <li> <%= link_to "Help", help_path %> </li>
                                                <li> <%= link_to "Log in", "#" %> </li>
                                        </ul>
                                </nav>    
                        </div>
</header>

when I run bundle exec rake test it gives me 1 failure which is

FAIL["test_layout_links", SiteLayoutTest, 2016-06-15 20:11:58 +0800] test_layout_links#SiteLayoutTest (1465992718.76s) Expected exactly 2 elements matching "a[href="/"]", found 4.. Expected: 2 Actual: 4 test/integration/site_layout_test.rb:6:in `block in '