1 files changed, 13 insertions, 1 deletions
diff --git a/spec/requests/api/branches_spec.rb b/spec/requests/api/branches_spec.rb
index 750b9a39e15..eba1a06b5e4 100644
--- a/spec/requests/api/branches_spec.rb
+++ b/spec/requests/api/branches_spec.rb
@@ -2,7 +2,7 @@
 
 require 'spec_helper'
 
-RSpec.describe API::Branches do
+RSpec.describe API::Branches, feature_category: :source_code_management do
   let_it_be(:user) { create(:user) }
 
   let(:project) { create(:project, :repository, creator: user, path: 'my.project', create_branch: 'ends-with.txt') }
@@ -344,6 +344,18 @@ RSpec.describe API::Branches do
         end
       end
 
+      context 'when branch is ambiguous' do
+        let(:branch_name) { 'prefix' }
+
+        before do
+          project.repository.create_branch('prefix/branch')
+        end
+
+        it_behaves_like '404 response' do
+          let(:request) { get api(route, current_user) }
+        end
+      end
+
       context 'when repository does not exist' do
         it_behaves_like '404 response' do
           let(:project) { create(:project, creator: user) }