diff --git a/services/jenkins/configmap-jcasc.yaml b/services/jenkins/configmap-jcasc.yaml
index 3c5822113..f84d2d797 100644
--- a/services/jenkins/configmap-jcasc.yaml
+++ b/services/jenkins/configmap-jcasc.yaml
@@ -605,11 +605,18 @@ data:
                           writeFile file: 'test-runner-job.yaml', text: manifest.join('\\n') + '\\n'
                           sh 'kubectl -n hermes-triage-demo create -f test-runner-job.yaml'
                           def verdict = 'unknown'
+                          // Read the container's exit code, not the Job status.
+                          // The kubelet records the exit code the moment the
+                          // container stops; the Job controller can take minutes
+                          // to reconcile .status.failed, and has been observed
+                          // taking over half an hour on this cluster. Waiting on
+                          // the Job made the build look hung long after the test
+                          // had actually finished.
                           timeout(time: 3, unit: 'MINUTES') {
                             waitUntil {
-                              def st = sh(script: 'kubectl -n hermes-triage-demo get job ' + jobName + ' -o jsonpath={.status.succeeded}:{.status.failed}', returnStdout: true).trim()
-                              if (st.startsWith('1')) { verdict = 'pass'; return true }
-                              if (st.endsWith(':1')) { verdict = 'fail'; return true }
+                              def code = sh(script: 'kubectl -n hermes-triage-demo get pods -l job-name=' + jobName + ' -o jsonpath="{.items[0].status.containerStatuses[0].state.terminated.exitCode}" 2>/dev/null || true', returnStdout: true).trim()
+                              if (code == '0') { verdict = 'pass'; return true }
+                              if (code != '') { verdict = 'fail'; return true }
                               return false
                             }
                           }