1 files changed, 22 insertions, 1 deletions
diff --git a/spec/controllers/projects/clusters_controller_spec.rb b/spec/controllers/projects/clusters_controller_spec.rb
index 38f72c769f3..d16e5eea2e9 100644
--- a/spec/controllers/projects/clusters_controller_spec.rb
+++ b/spec/controllers/projects/clusters_controller_spec.rb
@@ -7,7 +7,7 @@ RSpec.describe Projects::ClustersController, feature_category: :kubernetes_manag
   include GoogleApi::CloudPlatformHelpers
   include KubernetesHelpers
 
-  let_it_be(:project) { create(:project) }
+  let_it_be_with_reload(:project) { create(:project) }
 
   let(:user) { create(:user) }
 
@@ -140,6 +140,27 @@ RSpec.describe Projects::ClustersController, feature_category: :kubernetes_manag
           expect(response).to redirect_to(new_user_session_path)
         end
       end
+
+      context 'with a public project' do
+        before do
+          project.update!(visibility_level: Gitlab::VisibilityLevel::PUBLIC)
+          project.project_feature.update!(metrics_dashboard_access_level: ProjectFeature::ENABLED)
+        end
+
+        context 'with guest user' do
+          let(:prometheus_body) { nil }
+
+          before do
+            project.add_guest(user)
+          end
+
+          it 'returns 404' do
+            get :prometheus_proxy, params: prometheus_proxy_params
+
+            expect(response).to have_gitlab_http_status(:not_found)
+          end
+        end
+      end
     end
   end