diff --git a/app/helpers/diff_helper.rb b/app/helpers/diff_helper.rb
index 9b930bda5..164e4020c 100644
--- a/app/helpers/diff_helper.rb
+++ b/app/helpers/diff_helper.rb
@@ -1,7 +1,7 @@
 module DiffHelper
   def render_diff_stats(stats)
     path = @pull.try(:id) ? polymorphic_path([@project, @pull]) : ''
-    res = ["<table class='commit_stats'>"]
+    res = ["<table class='table table-responsive commit_stats'>"]
     stats.each_with_index do |stat, ind|
       res << "<tr>"
       res << "<td>#{link_to stat.filename.rtruncate(120), "#{path}#diff-#{ind}"}</td>"
@@ -36,7 +36,7 @@ module DiffHelper
            end
     prepare(args.merge({filepath: filepath, comments: comments, in_discussion: in_discussion}))
 
-    res = '<table class="table diff inline" cellspacing="0" cellpadding="0">'
+    res = '<table class="table diff inline table-responsive" cellspacing="0" cellpadding="0">'
     res << '<tbody>'
     res << renderer(diff_display.data) #diff_display.render(Git::Diff::InlineCallback.new comments, path)
     res << tr_line_comments(comments) if in_discussion
diff --git a/app/views/projects/pull_requests/_nav_tabs.html.slim b/app/views/projects/pull_requests/_nav_tabs.html.slim
index fc9ef12ed..b6bd65570 100644
--- a/app/views/projects/pull_requests/_nav_tabs.html.slim
+++ b/app/views/projects/pull_requests/_nav_tabs.html.slim
@@ -6,7 +6,7 @@ ul.nav.nav-tabs#pull_tabs role = 'tablist'
        href          = '#discussion' ]= t 'pull_requests.tabs.discussion'
   -if @stats
     li role = 'presentation'
-      a[ data-toggle   = 'diff'
+      a[ data-toggle   = 'tab'
          role          = 'tab'
          aria-controls = 'diff'
          href          = "#diff" ]= "#{t'pull_requests.tabs.diff'} (#{@stats.count})"
diff --git a/app/views/projects/pull_requests/_pull_diff.html.haml b/app/views/projects/pull_requests/_pull_diff.html.slim
similarity index 93%
rename from app/views/projects/pull_requests/_pull_diff.html.haml
rename to app/views/projects/pull_requests/_pull_diff.html.slim
index afbc97420..1c30a02f8 100644
--- a/app/views/projects/pull_requests/_pull_diff.html.haml
+++ b/app/views/projects/pull_requests/_pull_diff.html.slim
@@ -1,6 +1,6 @@
 - commit_id = pull_diff.deleted_file ? @pull.to_commit.id : @pull.from_commit.id
 .file
-  %a{name: "diff-#{pull_diff_counter}"}
+  a name = "diff-#{pull_diff_counter}"
   .top
     .l= h(pull_diff.renamed_file ? "#{pull_diff.a_path.rtruncate 60}=>#{pull_diff.b_path.rtruncate 60}" : pull_diff.b_path.rtruncate(120))
     - if @pull.from_project.present?