diff --git a/src/api/spec/models/bs_request_action_spec.rb b/src/api/spec/models/bs_request_action_spec.rb
index e599cbc22ca..eb492d3f1b0 100644
--- a/src/api/spec/models/bs_request_action_spec.rb
+++ b/src/api/spec/models/bs_request_action_spec.rb
@@ -1,5 +1,37 @@
 require 'rails_helper'
 
 RSpec.describe BsRequestAction do
+  context 'uniqueness validation of type' do
+    let(:bs_request) { create(:bs_request) }
+    let(:action_attributes) {
+      {
+        bs_request:     bs_request,
+        type:           'submit',
+        target_project: 'target_prj',
+        target_package: 'target_pkg'
+      }
+    }
+    let!(:bs_request_action) { create(:bs_request_action, action_attributes) }
+
+    it { expect(bs_request_action).to be_valid }
+
+    it 'validates uniqueness of type among bs requests, target_project and target_package' do
+      duplicated_bs_request_action = build(:bs_request_action, action_attributes)
+      expect(duplicated_bs_request_action).not_to be_valid
+      expect(duplicated_bs_request_action.errors.full_messages.to_sentence).to eq('Type has already been taken')
+    end
+
+    RSpec.shared_examples 'it skips validation for type' do |type|
+      context "type '#{type}'" do
+        it 'allows multiple bs request actions' do
+          expect(build(:bs_request_action, action_attributes.merge(type: 'add_role'))).to be_valid
+        end
+      end
+    end
+
+    it_should_behave_like 'it skips validation for type', 'add_role'
+    it_should_behave_like 'it skips validation for type', 'maintenance_incident'
+  end
+
   it { should belong_to(:bs_request).touch(true) }
 end