diff --git a/app/controllers/projects/clusters/applications_controller.rb b/app/controllers/projects/clusters/applications_controller.rb
index fae1ceb04b0..4b9d54a8537 100644
--- a/app/controllers/projects/clusters/applications_controller.rb
+++ b/app/controllers/projects/clusters/applications_controller.rb
@@ -9,7 +9,7 @@ class Projects::Clusters::ApplicationsController < Projects::ApplicationControll
                                                                         application_class: @application_class,
                                                                         cluster: @cluster).execute
     if scheduled
-      head :no_data
+      head :no_content
     else
       head :bad_request
     end
diff --git a/config/routes/project.rb b/config/routes/project.rb
index ee252ee2466..a1e429e6c20 100644
--- a/config/routes/project.rb
+++ b/config/routes/project.rb
@@ -192,7 +192,7 @@ constraints(ProjectUrlConstrainer.new) do
           get :status, format: :json
 
           scope :applications do
-            post '/*application', to: 'clusters/applications#create'
+            post '/*application', to: 'clusters/applications#create', as: :install_applications
           end
         end
       end
diff --git a/spec/controllers/projects/clusters/applications_controller_spec.rb b/spec/controllers/projects/clusters/applications_controller_spec.rb
new file mode 100644
index 00000000000..b8464b713c4
--- /dev/null
+++ b/spec/controllers/projects/clusters/applications_controller_spec.rb
@@ -0,0 +1,73 @@
+require 'spec_helper'
+
+describe Projects::Clusters::ApplicationsController do
+  include AccessMatchersForController
+
+  def current_application
+    Clusters::Cluster::APPLICATIONS[application]
+  end
+
+  describe 'POST create' do
+    let(:cluster) { create(:cluster, :project, :providing_by_gcp) }
+    let(:project) { cluster.project }
+    let(:application) { 'helm' }
+    let(:params) { { application: application, id: cluster.id } }
+
+    describe 'functionality' do
+      let(:user) { create(:user) }
+
+      before do
+        project.add_master(user)
+        sign_in(user)
+      end
+
+      it 'schedule an application installation' do
+        expect(ClusterInstallAppWorker).to receive(:perform_async).with(application, anything).once
+
+        expect { go }.to change { current_application.count }
+        expect(response).to have_http_status(:no_content)
+        expect(cluster.application_helm).to be_scheduled
+      end
+
+      context 'when cluster do not exists' do
+        before do
+          cluster.destroy!
+        end
+
+        it 'return 404' do
+          expect { go }.not_to change { current_application.count }
+          expect(response).to have_http_status(:not_found)
+        end
+      end
+
+      context 'when application is unknown' do
+        let(:application) { 'unkwnown-app' }
+
+        it 'return 404' do
+          go
+
+          expect(response).to have_http_status(:not_found)
+        end
+      end
+    end
+
+    describe 'security' do
+      before do
+        allow(ClusterInstallAppWorker).to receive(:perform_async)
+      end
+
+      it { expect { go }.to be_allowed_for(:admin) }
+      it { expect { go }.to be_allowed_for(:owner).of(project) }
+      it { expect { go }.to be_allowed_for(:master).of(project) }
+      it { expect { go }.to be_denied_for(:developer).of(project) }
+      it { expect { go }.to be_denied_for(:reporter).of(project) }
+      it { expect { go }.to be_denied_for(:guest).of(project) }
+      it { expect { go }.to be_denied_for(:user) }
+      it { expect { go }.to be_denied_for(:external) }
+    end
+
+    def go
+      post :create, params.merge(namespace_id: project.namespace, project_id: project)
+    end
+  end
+end
diff --git a/spec/support/matchers/access_matchers_for_controller.rb b/spec/support/matchers/access_matchers_for_controller.rb
index bb6b7c63ee9..cdb62a5deee 100644
--- a/spec/support/matchers/access_matchers_for_controller.rb
+++ b/spec/support/matchers/access_matchers_for_controller.rb
@@ -5,7 +5,7 @@ module AccessMatchersForController
   extend RSpec::Matchers::DSL
   include Warden::Test::Helpers
 
-  EXPECTED_STATUS_CODE_ALLOWED = [200, 201, 302].freeze
+  EXPECTED_STATUS_CODE_ALLOWED = [200, 201, 204, 302].freeze
   EXPECTED_STATUS_CODE_DENIED = [401, 404].freeze
 
   def emulate_user(role, membership = nil)