Add spec

spec/requests/api/runner_spec.rb

@@ -797,6 +797,15 @@ describe API::Runner, :clean_gitlab_redis_shared_state do
           it { expect(job).to be_runner_system_failure }
         end
+
+        context 'when failure_reason is runner_execution_timeout' do
+          before do
+            update_job(state: 'failed', failure_reason: 'runner_execution_timeout')
+            job.reload
+          end
+
+          it { expect(job).to be_runner_execution_timeout }
+        end
       end
       context 'when trace is given' do