diff --git a/app/controllers/projects/environments_controller.rb b/app/controllers/projects/environments_controller.rb
index fd57afbd05f23d6264eb0c41d84581c47d524829..efe8377683400306889b108ac38c2b0b41ce9f4d 100644
--- a/app/controllers/projects/environments_controller.rb
+++ b/app/controllers/projects/environments_controller.rb
@@ -31,6 +31,7 @@ class Projects::EnvironmentsController < Projects::ApplicationController
   def folder
     folder_environments = project.environments.where(environment_type: params[:id])
     @environments = folder_environments.with_state(params[:scope] || :available)
+      .order(:name)
 
     respond_to do |format|
       format.html
diff --git a/changelogs/unreleased/zj-sort-env-folders.yml b/changelogs/unreleased/zj-sort-env-folders.yml
new file mode 100644
index 0000000000000000000000000000000000000000..b3ca97aef945190c0af91f58a57ec2a3a7cbb6d3
--- /dev/null
+++ b/changelogs/unreleased/zj-sort-env-folders.yml
@@ -0,0 +1,4 @@
+---
+title: Sort folder for environments
+merge_request:
+author:
diff --git a/spec/controllers/projects/environments_controller_spec.rb b/spec/controllers/projects/environments_controller_spec.rb
index c0f8c36a0180a2433ca8560b0a4ee69b3786f6af..20f99b209eb5ba328fc802bb2221eacab43f9946 100644
--- a/spec/controllers/projects/environments_controller_spec.rb
+++ b/spec/controllers/projects/environments_controller_spec.rb
@@ -1,25 +1,25 @@
 require 'spec_helper'
 
 describe Projects::EnvironmentsController do
-  let(:user) { create(:user) }
-  let(:project) { create(:empty_project) }
+  set(:user) { create(:user) }
+  set(:project) { create(:empty_project) }
 
-  let(:environment) do
+  set(:environment) do
     create(:environment, name: 'production', project: project)
   end
 
   before do
-    project.team << [user, :master]
+    project.add_master(user)
 
     sign_in(user)
   end
 
   describe 'GET index' do
-    context 'when standardrequest has been made' do
+    context 'when a request for the HTML is made' do
       it 'responds with status code 200' do
         get :index, environment_params
 
-        expect(response).to be_ok
+        expect(response).to have_http_status(:ok)
       end
     end
 
@@ -84,6 +84,9 @@ describe Projects::EnvironmentsController do
       create(:environment, project: project,
                            name: 'staging-1.0/review',
                            state: :available)
+      create(:environment, project: project,
+                           name: 'staging-1.0/zzz',
+                           state: :available)
     end
 
     context 'when using default format' do
@@ -98,7 +101,7 @@ describe Projects::EnvironmentsController do
     end
 
     context 'when using JSON format' do
-      it 'responds with JSON' do
+      it 'sorts the subfolders lexicographically' do
         get :folder, namespace_id: project.namespace,
                      project_id: project,
                      id: 'staging-1.0',
@@ -108,6 +111,8 @@ describe Projects::EnvironmentsController do
         expect(response).not_to render_template 'folder'
         expect(json_response['environments'][0])
           .to include('name' => 'staging-1.0/review')
+        expect(json_response['environments'][1])
+          .to include('name' => 'staging-1.0/zzz')
       end
     end
   end