diff --git a/CHANGELOG b/CHANGELOG
index d248639296f..282e4b9b449 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -5,6 +5,7 @@ v 8.11.0 (unreleased)
   - Fix don't pass a local variable called `i` to a partial. !20510 (herminiotorres)
   - Fix rename `add_users_into_project` and `projects_ids`. !20512 (herminiotorres)
   - Fix the title of the toggle dropdown button. !5515 (herminiotorres)
+  - Rename `markdown_preview` routes to `preview_markdown`. (Christopher Bartz)
   - Improve diff performance by eliminating redundant checks for text blobs
   - Ensure that branch names containing escapable characters (e.g. %20) aren't unescaped indiscriminately. !5770 (ewiltshi)
   - Convert switch icon into icon font (ClemMakesApps)
diff --git a/app/assets/javascripts/dropzone_input.js b/app/assets/javascripts/dropzone_input.js
index 288cce04f87..4a6fea929c7 100644
--- a/app/assets/javascripts/dropzone_input.js
+++ b/app/assets/javascripts/dropzone_input.js
@@ -1,5 +1,5 @@
 
-/*= require markdown_preview */
+/*= require preview_markdown */
 
 (function() {
   this.DropzoneInput = (function() {
diff --git a/app/assets/javascripts/markdown_preview.js b/app/assets/javascripts/preview_markdown.js
similarity index 98%
rename from app/assets/javascripts/markdown_preview.js
rename to app/assets/javascripts/preview_markdown.js
index 18fc7bae09a..5fd75799640 100644
--- a/app/assets/javascripts/markdown_preview.js
+++ b/app/assets/javascripts/preview_markdown.js
@@ -28,7 +28,7 @@
     };
 
     MarkdownPreview.prototype.renderMarkdown = function(text, success) {
-      if (!window.markdown_preview_path) {
+      if (!window.preview_markdown_path) {
         return;
       }
       if (text === this.ajaxCache.text) {
@@ -36,7 +36,7 @@
       }
       return $.ajax({
         type: 'POST',
-        url: window.markdown_preview_path,
+        url: window.preview_markdown_path,
         data: {
           text: text
         },
diff --git a/app/controllers/projects/wikis_controller.rb b/app/controllers/projects/wikis_controller.rb
index 607fe9c7fed..177ccf5eec9 100644
--- a/app/controllers/projects/wikis_controller.rb
+++ b/app/controllers/projects/wikis_controller.rb
@@ -91,7 +91,7 @@ class Projects::WikisController < Projects::ApplicationController
     )
   end
 
-  def markdown_preview
+  def preview_markdown
     text = params[:text]
 
     ext = Gitlab::ReferenceExtractor.new(@project, current_user)
diff --git a/app/controllers/projects_controller.rb b/app/controllers/projects_controller.rb
index 207f9d6a77f..47efbd4a939 100644
--- a/app/controllers/projects_controller.rb
+++ b/app/controllers/projects_controller.rb
@@ -238,7 +238,7 @@ class ProjectsController < Projects::ApplicationController
     }
   end
 
-  def markdown_preview
+  def preview_markdown
     text = params[:text]
 
     ext = Gitlab::ReferenceExtractor.new(@project, current_user)
diff --git a/app/views/layouts/project.html.haml b/app/views/layouts/project.html.haml
index ee9c0366f2b..9fe94291db7 100644
--- a/app/views/layouts/project.html.haml
+++ b/app/views/layouts/project.html.haml
@@ -6,13 +6,13 @@
 - content_for :scripts_body_top do
   - project = @target_project || @project
   - if @project_wiki && @page
-    - markdown_preview_path = namespace_project_wiki_markdown_preview_path(project.namespace, project, @page.slug)
+    - preview_markdown_path = namespace_project_wiki_preview_markdown_path(project.namespace, project, @page.slug)
   - else
-    - markdown_preview_path = markdown_preview_namespace_project_path(project.namespace, project)
+    - preview_markdown_path = preview_markdown_namespace_project_path(project.namespace, project)
   - if current_user
     :javascript
       window.project_uploads_path = "#{namespace_project_uploads_path project.namespace,project}";
-      window.markdown_preview_path = "#{markdown_preview_path}";
+      window.preview_markdown_path = "#{preview_markdown_path}";
 
 - content_for :scripts_body do
   = render "layouts/init_auto_complete" if current_user
diff --git a/config/routes.rb b/config/routes.rb
index 99a2cd884fe..9a98fab15a3 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -468,7 +468,7 @@ Rails.application.routes.draw do
         post :unarchive
         post :housekeeping
         post :toggle_star
-        post :markdown_preview
+        post :preview_markdown
         post :export
         post :remove_export
         post :generate_new_export
@@ -672,7 +672,7 @@ Rails.application.routes.draw do
           get '/wikis/*id', to: 'wikis#show', as: 'wiki', constraints: WIKI_SLUG_ID
           delete '/wikis/*id', to: 'wikis#destroy', constraints: WIKI_SLUG_ID
           put '/wikis/*id', to: 'wikis#update', constraints: WIKI_SLUG_ID
-          post '/wikis/*id/markdown_preview', to: 'wikis#markdown_preview', constraints: WIKI_SLUG_ID, as: 'wiki_markdown_preview'
+          post '/wikis/*id/preview_markdown', to: 'wikis#preview_markdown', constraints: WIKI_SLUG_ID, as: 'wiki_preview_markdown'
         end
 
         resource :repository, only: [:create] do
diff --git a/spec/routing/project_routing_spec.rb b/spec/routing/project_routing_spec.rb
index b941e78f983..77842057a10 100644
--- a/spec/routing/project_routing_spec.rb
+++ b/spec/routing/project_routing_spec.rb
@@ -60,7 +60,7 @@ end
 #                  project GET    /:id(.:format)          projects#show
 #                          PUT    /:id(.:format)          projects#update
 #                          DELETE /:id(.:format)          projects#destroy
-# markdown_preview_project POST   /:id/markdown_preview(.:format) projects#markdown_preview
+# preview_markdown_project POST   /:id/preview_markdown(.:format) projects#preview_markdown
 describe ProjectsController, 'routing' do
   it 'to #create' do
     expect(post('/projects')).to route_to('projects#create')
@@ -91,9 +91,9 @@ describe ProjectsController, 'routing' do
     expect(delete('/gitlab/gitlabhq')).to route_to('projects#destroy', namespace_id: 'gitlab', id: 'gitlabhq')
   end
 
-  it 'to #markdown_preview' do
-    expect(post('/gitlab/gitlabhq/markdown_preview')).to(
-      route_to('projects#markdown_preview', namespace_id: 'gitlab', id: 'gitlabhq')
+  it 'to #preview_markdown' do
+    expect(post('/gitlab/gitlabhq/preview_markdown')).to(
+      route_to('projects#preview_markdown', namespace_id: 'gitlab', id: 'gitlabhq')
     )
   end
 end